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Search for continuous gravitational waves from neutron stars in globular cluster NGC 6544

Physical Review D 2017年第8期95卷 082005-082005页

作者： B. P. Abbott R. Abbott T. D. Abbott M. R. Abernathy F. Acernese K. Ackley C. Adams T. Adams P. Addesso R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain B. Allen A. Allocca P. A. Altin S. B. Anderson W. G. Anderson K. Arai M. C. Araya C. C. Arceneaux J. S. Areeda N. Arnaud K. G. Arun S. Ascenzi G. Ashton M. Ast S. M. Aston P. Astone P. Aufmuth C. Aulbert S. Babak P. Bacon M. K. M. Bader P. T. Baker F. Baldaccini G. Ballardin S. W. Ballmer J. C. Barayoga S. E. Barclay B. C. Barish D. Barker F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti J. C. Batch C. Baune V. Bavigadda M. Bazzan M. Bejger A. S. Bell B. K. Berger G. Bergmann C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser S. Bhagwat R. Bhandare I. A. Bilenko G. Billingsley J. Birch R. Birney S. Biscans A. Bisht M. Bitossi C. Biwer M. A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair S. Bloemen O. Bock M. Boer G. Bogaert C. Bogan A. Bohe C. Bond F. Bondu R. Bonnand B. A. Boom R. Bork V. Boschi S. Bose Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady V. B. Braginsky M. Branchesi J. E. Brau T. Briant A. Brillet M. Brinkmann V. Brisson P. Brockill J. E. Broida A. F. Brooks D. A. Brown D. D. Brown N. M. Brown S. Brunett C. C. Buchanan A. Buikema T. Bulik H. J. Bulten A. Buonanno D. Buskulic C. Buy R. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo T. Callister E. Calloni J. B. Camp K. C. Cannon J. Cao C. D. Capano E. Capocasa F. Carbognani S. Caride J. Casanueva Diaz C. Casentini S. Caudill M. Cavaglià F. Cavalier R. Cavalieri G. Cella C. B. Cepeda L. Cerboni Baiardi G. Cerretani E. Cesarini S. J. Chamberlin M. Chan S. Chao P. Charlton E. Chassande-Mottin B. D. Cheeseboro H. Y. Chen Y. Chen C. Cheng A. Chincarini A. Chiummo H. S. Cho M. Cho J. H. Chow N. Christensen Q. Chu S. Chua S. Chung G. Ciani F. Clara J. A. Clark F. Cleva E. Coccia P.-F. Cohadon A. Colla C. G. Collette L. Cominsky M. Constancio, Jr. A. Conte L. Conti LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA American University Washington D.C. 20016 USA Università di Salerno Fisciano I-84084 Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy University of Florida Gainesville Florida 32611 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP) Université Savoie Mont Blanc CNRS/IN2P3 F-74941 Annecy-le-Vieux France University of Sannio at Benevento I-82100 Benevento Italy and INFN Sezione di Napoli I-80100 Napoli Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-30167 Hannover Germany Nikhef Science Park 1098 XG Amsterdam Netherlands LIGO Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil INFN Gran Sasso Science Institute I-67100 L’Aquila Italy INFN Sezione di Roma Tor Vergata I-00133 Roma Italy Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA Leibniz Universität Hannover D-30167 Hannover Germany Università di Pisa I-56127 Pisa Italy INFN Sezione di Pisa I-56127 Pisa Italy Australian National University Canberra Australian Capital Territory 0200 Australia The University of Mississippi University Mississippi 38677 USA California State University Fullerton Fullerton California 92831 USA LAL University of Paris-Sud CNRS/IN2P3 Université Paris-Saclay F-91898 Orsay France Chennai Mathematical Institute Chennai 603103 India Università di Roma Tor Vergata I-00133 Roma Italy University of Southampton Southampton SO17 1BJ United Kingdom Universität Hamburg D-22761 Hamburg Germany INFN Sezione di Roma I-00185 Roma Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitati

We describe a directed search for continuous gravitational waves in data from the sixth initial LIGO science run. The target was the nearby globular cluster NGC 6544 at a distance of ≈2.7 kpc. The search covered a broad band of frequencies along with first and second frequency derivatives for a fixed sky position. The search coherently integrated data from the two LIGO interferometers over a time span of 9.2 days using the matched-filtering F-statistic. We found no gravitational-wave signals and set 95% confidence upper limits as stringent as 6.0×10−25 on intrinsic strain and 8.5×10−6 on fiducial ellipticity. These values beat the indirect limits from energy conservation for stars with characteristic spin-down ages older than 300 years and are within the range of theoretical predictions for possible neutron-star ellipticities. An important feature of this search was use of a barycentric resampling algorithm which substantially reduced computational cost; this method is used extensively in searches of Advanced LIGO and Virgo detector data.

关键词： Gravitational waves Neutron stars & pulsars Gravitational wave detectors

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Comprehensive all-sky search for periodic gravitational waves in the sixth science run LIGO data

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Physical Review D 2016年第4期94卷 042002-042002页

作者： B. P. Abbott R. Abbott T. D. Abbott M. R. Abernathy F. Acernese K. Ackley C. Adams T. Adams P. Addesso R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith B. Allen A. Allocca P. A. Altin S. B. Anderson W. G. Anderson K. Arai M. C. Araya C. C. Arceneaux J. S. Areeda N. Arnaud K. G. Arun S. Ascenzi G. Ashton M. Ast S. M. Aston P. Astone P. Aufmuth C. Aulbert S. Babak P. Bacon M. K. M. Bader P. T. Baker F. Baldaccini G. Ballardin S. W. Ballmer J. C. Barayoga S. E. Barclay B. C. Barish D. Barker F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti J. C. Batch C. Baune V. Bavigadda M. Bazzan M. Bejger A. S. Bell B. K. Berger G. Bergmann C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser S. Bhagwat R. Bhandare I. A. Bilenko G. Billingsley J. Birch R. Birney S. Biscans A. Bisht M. Bitossi C. Biwer M. A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair S. Bloemen O. Bock M. Boer G. Bogaert C. Bogan A. Bohe C. Bond F. Bondu R. Bonnand B. A. Boom R. Bork V. Boschi S. Bose Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady V. B. Braginsky M. Branchesi J. E. Brau T. Briant A. Brillet M. Brinkmann V. Brisson P. Brockill J. E. Broida A. F. Brooks D. A. Brown D. D. Brown N. M. Brown S. Brunett C. C. Buchanan A. Buikema T. Bulik H. J. Bulten A. Buonanno D. Buskulic C. Buy R. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo T. Callister E. Calloni J. B. Camp K. C. Cannon J. Cao C. D. Capano E. Capocasa F. Carbognani S. Caride J. Casanueva Diaz C. Casentini S. Caudill M. Cavaglià F. Cavalier R. Cavalieri G. Cella C. B. Cepeda L. Cerboni Baiardi G. Cerretani E. Cesarini M. Chan S. Chao P. Charlton E. Chassande-Mottin B. D. Cheeseboro H. Y. Chen Y. Chen C. Cheng A. Chincarini A. Chiummo H. S. Cho M. Cho J. H. Chow N. Christensen Q. Chu S. Chua S. Chung G. Ciani F. Clara J. A. Clark F. Cleva E. Coccia P.-F. Cohadon A. Colla C. G. Collette L. Cominsky M. Constancio, Jr. A. Conte L. Conti D. Cook LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA American University Washington D.C. 20016 USA Università di Salerno Fisciano I-84084 Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy University of Florida Gainesville Florida 32611 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA Laboratoire d’Annecy-le-Vieux de Physique des Particules (LAPP) Université Savoie Mont Blanc CNRS/IN2P3 F-74941 Annecy-le-Vieux France University of Sannio at Benevento I-82100 Benevento Italy and INFN Sezione di Napoli I-80100 Napoli Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-30167 Hannover Germany Nikhef Science Park 1098 XG Amsterdam The Netherlands LIGO Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil INFN Gran Sasso Science Institute I-67100 L’Aquila Italy INFN Sezione di Roma Tor Vergata I-00133 Roma Italy Inter-University Centre for Astronomy and Astrophysics Pune 411007 India International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bangalore 560012 India University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA Leibniz Universität Hannover D-30167 Hannover Germany Università di Pisa I-56127 Pisa Italy INFN Sezione di Pisa I-56127 Pisa Italy Australian National University Canberra Australian Capital Territory 0200 Australia The University of Mississippi University Mississippi 38677 USA California State University Fullerton Fullerton California 92831 USA LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay Orsay France Chennai Mathematical Institute Chennai 603103 India Università di Roma Tor Vergata I-00133 Roma Italy University of Southampton Southampton SO17 1BJ United Kingdom Universität Hamburg D-22761 Hamburg Germany INF

We report on a comprehensive all-sky search for periodic gravitational waves in the frequency band 100–1500 Hz and with a frequency time derivative in the range of [−1.18,+1.00]×10−8 Hz/s. Such a signal could be produced by a nearby spinning and slightly nonaxisymmetric isolated neutron star in our galaxy. This search uses the data from the initial LIGO sixth science run and covers a larger parameter space with respect to any past search. A Loosely Coherent detection pipeline was applied to follow up weak outliers in both Gaussian (95% recovery rate) and non-Gaussian (75% recovery rate) bands. No gravitational wave signals were observed, and upper limits were placed on their strength. Our smallest upper limit on worst-case (linearly polarized) strain amplitude h0 is 9.7×10−25 near 169 Hz, while at the high end of our frequency range we achieve a worst-case upper limit of 5.5×10−24. Both cases refer to all sky locations and entire range of frequency derivative values.

关键词： Gravitational waves Gravitational wave detectors

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GW190521: A Binary Black Hole Merger with a Total Mass of 150 M⊙

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Physical Review Letters 2020年第10期125卷 101102-101102页

作者： R. Abbott T. D. Abbott S. Abraham F. Acernese K. Ackley C. Adams R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar A. Aich L. Aiello A. Ain P. Ajith S. Akcay G. Allen A. Allocca P. A. Altin A. Amato S. Anand A. Ananyeva S. B. Anderson W. G. Anderson S. V. Angelova S. Ansoldi S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali S. Ascenzi G. Ashton S. M. Aston P. Astone F. Aubin P. Aufmuth K. AultONeal C. Austin V. Avendano S. Babak P. Bacon F. Badaracco M. K. M. Bader S. Bae A. M. Baer J. Baird F. Baldaccini G. Ballardin S. W. Ballmer A. Bals A. Balsamo G. Baltus S. Banagiri D. Bankar R. S. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker K. Barkett P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley M. Bazzan B. Bécsy M. Bejger I. Belahcene A. S. Bell D. Beniwal M. G. Benjamin J. D. Bentley F. Bergamin B. K. Berger G. Bergmann S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser R. Bhandare A. V. Bhandari J. Bidler E. Biggs I. A. Bilenko G. Billingsley R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht G. Bissenbayeva M. Bitossi M. A. Bizouard J. K. Blackburn J. Blackman C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer Y. Boetzel G. Bogaert F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi S. Bose V. Bossilkov J. Bosveld Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs F. Brighenti A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz A. Buikema T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic R. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. B. Camp M. Canepa K. C. Cannon H. Cao J. Cao G. Carapella F. Carbognani S. Caride M. F. Carney G. Carullo J. Casanueva Diaz C. Casentini J. Castañ LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Cambridge Cambridge CB2 1TN United Kingdom University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil The University of Texas Rio Grande Valley Brownsville Texas 78520 USA Gran Sasso Science Institute (GSSI) I-67100 L’Aquila Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India NCSA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA INFN Sezione di Pisa I-56127 Pisa Italy Laboratoire des Matériaux Avancés (LMA) IP2I—UMR 5822 CNRS Université de Lyon F-69622 Villeurbanne France University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA SUPA University of Strathclyde Glasgow G1 1XQ United Kingdom Dipartimento di Matematica e Informatica Università di Udine I-33100 Udine Italy INFN Sezione di Trieste I-34127 Trieste Italy APC AstroP

On May 21, 2019 at 03:02:29 UTC Advanced LIGO and Advanced Virgo observed a short duration gravitational-wave signal, GW190521, with a three-detector network signal-to-noise ratio of 14.7, and an estimated false-alarm rate of 1 in 4900 yr using a search sensitive to generic transients. If GW190521 is from a quasicircular binary inspiral, then the detected signal is consistent with the merger of two black holes with masses of 85−14+21 M⊙ and 66−18+17 M⊙ (90% credible intervals). We infer that the primary black hole mass lies within the gap produced by (pulsational) pair-instability supernova processes, with only a 0.32% probability of being below 65 M⊙. We calculate the mass of the remnant to be 142−16+28 M⊙, which can be considered an intermediate mass black hole (IMBH). The luminosity distance of the source is 5.3−2.6+2.4 Gpc, corresponding to a redshift of 0.82−0.34+0.28. The inferred rate of mergers similar to GW190521 is 0.13−0.11+0.30 Gpc−3 yr−1.

关键词： Experimental studies of gravity General relativity Gravitational waves

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Search of the early O3 LIGO data for continuous gravitational waves from the Cassiopeia A and Vela Jr. supernova remnants

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Physical Review D 2022年第8期105卷 082005-082005页

作者： R. Abbott T. D. Abbott F. Acernese K. Ackley C. Adams N. Adhikari R. X. Adhikari V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith S. Albanesi A. Allocca P. A. Altin A. Amato C. Anand S. Anand A. Ananyeva S. B. Anderson W. G. Anderson T. Andrade N. Andres T. Andrić S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali G. Ashton M. Assiduo S. M. Aston P. Astone F. Aubin C. Austin S. Babak F. Badaracco M. K. M. Bader C. Badger S. Bae A. M. Baer S. Bagnasco Y. Bai J. Baird M. Ball G. Ballardin S. W. Ballmer A. Balsamo G. Baltus S. Banagiri D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley A. C. Baylor M. Bazzan B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene V. Benedetto D. Beniwal T. F. Bennett J. D. Bentley M. BenYaala F. Bergamin B. K. Berger S. Bernuzzi D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare U. Bhardwaj D. Bhattacharjee S. Bhaumik I. A. Bilenko G. Billingsley S. Bini R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer G. Bogaert M. Boldrini L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz J. Bryant T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic C. Buy R. L. Byer L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. Cameron J. B. Camp M. Canepa S. Canevarolo M. Cannavacciuolo K. C. Cannon H. Cao E. Capote G. LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics and Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India INFN Sezione di Torino I-10125 Torino Italy Università di Napoli “Federico II” Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière F-69622 Villeurbanne France Institut de Ciències del Cosmos (ICCUB) Universitat de Barcelona C/ Martí i Franquès 1 Barcelona 08028 Spain Laboratoire d’Annecy de Physique des Particules (LAPP) Université Grenoble Alpes Université Savoie Mont Blanc CNRS/IN

We present directed searches for continuous gravitational waves from the neutron stars in the Cassiopeia A (Cas A) and Vela Jr. supernova remnants. We carry out the searches in the LIGO detector data from the first six months of the third Advanced LIGO and Virgo observing run using the weave semicoherent method, which sums matched-filter detection-statistic values over many time segments spanning the observation period. No gravitational wave signal is detected in the search band of 20–976 Hz for assumed source ages greater than 300 years for Cas A and greater than 700 years for Vela Jr. Estimates from simulated continuous wave signals indicate we achieve the most sensitive results to date across the explored parameter space volume, probing to strain magnitudes as low as ∼6.3×10−26 for Cas A and ∼5.6×10−26 for Vela Jr. at frequencies near 166 Hz at 95% efficiency.

关键词： Astrophysical studies of gravity Gravitational wave detection Gravitational wave sources Gravitational waves

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GW190412: Observation of a binary-black-hole coalescence with asymmetric masses

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Physical Review D 2020年第4期102卷 043015-043015页

作者： R. Abbott T. D. Abbott S. Abraham F. Acernese K. Ackley C. Adams R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar A. Aich L. Aiello A. Ain P. Ajith S. Akcay G. Allen A. Allocca P. A. Altin A. Amato S. Anand A. Ananyeva S. B. Anderson W. G. Anderson S. V. Angelova S. Ansoldi S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali S. Ascenzi G. Ashton S. M. Aston P. Astone F. Aubin P. Aufmuth K. AultONeal C. Austin V. Avendano S. Babak P. Bacon F. Badaracco M. K. M. Bader S. Bae A. M. Baer J. Baird F. Baldaccini G. Ballardin S. W. Ballmer A. Bals A. Balsamo G. Baltus S. Banagiri D. Bankar R. S. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker K. Barkett P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley M. Bazzan B. Bécsy M. Bejger I. Belahcene A. S. Bell D. Beniwal M. G. Benjamin R. Benkel J. D. Bentley F. Bergamin B. K. Berger G. Bergmann S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser R. Bhandare A. V. Bhandari J. Bidler E. Biggs I. A. Bilenko G. Billingsley R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht G. Bissenbayeva M. Bitossi M. A. Bizouard J. K. Blackburn J. Blackman C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer Y. Boetzel G. Bogaert F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi S. Bose V. Bossilkov J. Bosveld Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs F. Brighenti A. Brillet M. Brinkmann R. Brito P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz A. Buikema T. Bulik H. J. Bulten A. Buonanno D. Buskulic R. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. B. Camp M. Canepa K. C. Cannon H. Cao J. Cao G. Carapella F. Carbognani S. Caride M. F. Carney G. Carullo J. Casanueva Diaz C. Casentini J. C LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Cambridge Cambridge CB2 1TN United Kingdom University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil The University of Texas Rio Grande Valley Brownsville Texas 78520 USA Gran Sasso Science Institute (GSSI) I-67100 L’Aquila Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India NCSA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA INFN Sezione di Pisa I-56127 Pisa Italy Laboratoire des Matériaux Avancés (LMA) IP2I–UMR 5822 CNRS Université de Lyon F-69622 Villeurbanne France University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA SUPA University of Strathclyde Glasgow G1 1XQ United Kingdom Dipartimento di Matematica e Informatica Università di Udine I-33100 Udine Italy INFN Sezione di Trieste I-34127 Trieste Italy APC Astro

We report the observation of gravitational waves from a binary-black-hole coalescence during the first two weeks of LIGO’s and Virgo’s third observing run. The signal was recorded on April 12, 2019 at 05∶30∶44 UTC with a network signal-to-noise ratio of 19. The binary is different from observations during the first two observing runs most notably due to its asymmetric masses: a ∼30 M⊙ black hole merged with a ∼8 M⊙ black hole companion. The more massive black hole rotated with a dimensionless spin magnitude between 0.22 and 0.60 (90% probability). Asymmetric systems are predicted to emit gravitational waves with stronger contributions from higher multipoles, and indeed we find strong evidence for gravitational radiation beyond the leading quadrupolar order in the observed signal. A suite of tests performed on GW190412 indicates consistency with Einstein’s general theory of relativity. While the mass ratio of this system differs from all previous detections, we show that it is consistent with the population model of stellar binary black holes inferred from the first two observing runs.

关键词： Gravitational wave detection Gravitational wave sources Gravitational waves Astronomical black holes

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GWTC-2: Compact Binary Coalescences Observed by LIGO and Virgo during the First Half of the Third Observing Run

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Physical Review X 2021年第2期11卷 021053-021053页

作者： R. Abbott T. D. Abbott S. Abraham F. Acernese K. Ackley A. Adams C. Adams R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith S. Akcay G. Allen A. Allocca P. A. Altin A. Amato S. Anand A. Ananyeva S. B. Anderson W. G. Anderson S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali S. Ascenzi G. Ashton S. M. Aston P. Astone F. Aubin P. Aufmuth K. AultONeal C. Austin V. Avendano S. Babak F. Badaracco M. K. M. Bader S. Bae A. M. Baer S. Bagnasco J. Baird M. Ball G. Ballardin S. W. Ballmer A. Bals A. Balsamo G. Baltus S. Banagiri D. Bankar R. S. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo S. Barnum F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley M. Bazzan B. R. Becher B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene D. Beniwal M. G. Benjamin T. F. Bennett J. D. Bentley F. Bergamin B. K. Berger G. Bergmann S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser R. Bhandare A. V. Bhandari D. Bhattacharjee J. Bidler I. A. Bilenko G. Billingsley R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht M. Bitossi M.-A. Bizouard J. K. Blackburn J. Blackman C. D. Blair D. G. Blair R. M. Blair O. Blanch F. Bobba N. Bode M. Boer Y. Boetzel G. Bogaert M. Boldrini F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs F. Brighenti A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz A. Buikema T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic R. L. Byer M. Cabero L. Cadonati M. Caesar G. Cagnoli C. Cahillane J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. B. Camp M. Canepa K. C. Cannon H. Cao J. Cao G. Carapella F. Carbognani M. F. LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy OzGrav School of Physics and Astronomy Monash University Clayton 3800 Victoria Australia Christopher Newport University Newport News Virginia 23606 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gran Sasso Science Institute (GSSI) I-67100L’Aquila Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi Italy INFN Sezione di Pisa I-56127 Pisa Italy Università di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India University College Dublin Dublin 4 Ireland NCSA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière F-69622 Villeurbanne France University of Wisconsin–Milwaukee Milwaukee Wisconsin 53201 USA SUPA University of Strathclyde Glasgow G1 1XQ United Kingdom Dipartimento di Matematica e Informatica Università di Udi

We report on gravitational-wave discoveries from compact binary coalescences detected by Advanced LIGO and Advanced Virgo in the first half of the third observing run (O3a) between 1 April 2019 15∶00 UTC and 1 October 2019 15∶00 UTC. By imposing a false-alarm-rate threshold of two per year in each of the four search pipelines that constitute our search, we present 39 candidate gravitational-wave events. At this threshold, we expect a contamination fraction of less than 10%. Of these, 26 candidate events were reported previously in near-real time through gamma-ray coordinates network notices and circulars; 13 are reported here for the first time. The catalog contains events whose sources are black hole binary mergers up to a redshift of approximately 0.8, as well as events whose components cannot be unambiguously identified as black holes or neutron stars. For the latter group, we are unable to determine the nature based on estimates of the component masses and spins from gravitational-wave data alone. The range of candidate event masses which are unambiguously identified as binary black holes (both objects ≥3 M⊙) is increased compared to GWTC-1, with total masses from approximately 14 M⊙ for GW190924_021846 to approximately 150 M⊙ for GW190521. For the first time, this catalog includes binary systems with significantly asymmetric mass ratios, which had not been observed in data taken before April 2019. We also find that 11 of the 39 events detected since April 2019 have positive effective inspiral spins under our default prior (at 90% credibility), while none exhibit negative effective inspiral spin. Given the increased sensitivity of Advanced LIGO and Advanced Virgo, the detection of 39 candidate events in approximately 26 weeks of data (approximately 1.5 per week) is consistent with GWTC-1.

关键词： Gravitational wave detection Gravitational wave sources

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GWTC-2.1: Deep extended catalog of compact binary coalescences observed by LIGO and Virgo during the first half of the third observing run

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Physical Review D 2024年第2期109卷 022001-022001页

作者： R. Abbott T. D. Abbott F. Acernese K. Ackley C. Adams N. Adhikari R. X. Adhikari V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith S. Albanesi A. Allocca P. A. Altin A. Amato C. Anand S. Anand A. Ananyeva S. B. Anderson W. G. Anderson T. Andrade N. Andres T. Andrić S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali G. Ashton M. Assiduo S. M. Aston P. Astone F. Aubin C. Austin S. Babak F. Badaracco M. K. M. Bader C. Badger S. Bae A. M. Baer S. Bagnasco Y. Bai J. Baird M. Ball G. Ballardin S. W. Ballmer A. Balsamo G. Baltus S. Banagiri D. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley A. C. Baylor M. Bazzan B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene V. Benedetto D. Beniwal T. F. Bennett J. D. Bentley M. BenYaala F. Bergamin B. K. Berger S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser D. Beveridge R. Bhandare U. Bhardwaj D. Bhattacharjee S. Bhaumik I. A. Bilenko G. Billingsley S. Bini R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer G. Bogaert M. Boldrini L. D. Bonavena F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz J. Bryant T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic C. Buy R. L. Byer L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. Cameron J. B. Camp M. Canepa S. Canevarolo M. Cannavacciuolo K. C. Cannon H. C LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy OzGrav School of Physics and Astronomy Monash University Clayton 3800 Victoria Australia LIGO Livingston Observatory Livingston Louisiana 70754 USA University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany Inter-University Centre for Astronomy and Astrophysics Pune 411007 India University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India INFN Sezione di Torino I-10125 Torino Italy Università di Napoli “Federico II” Complesso Universitario di Monte S. Angelo I-80126 Napoli Italy Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière F-69622 Villeurbanne France Institut de Ciències del Cosmos (ICCUB) Universitat de Barcelona C/ Martí i Franquès 1 Barcelona 08028 Spain Laboratoire d’Annecy de Physique des Particules (LAPP) Univ. Grenoble Alpes Université Savoie Mont Blanc CNRS/IN2P3

The second Gravitational-Wave Transient Catalog, GWTC-2, reported on 39 compact binary coalescences observed by the Advanced LIGO and Advanced Virgo detectors between 1 April 2019 15∶00 UTC and 1 October 2019 15∶00 UTC. Here, we present GWTC-2.1, which reports on a deeper list of candidate events observed over the same period. We analyze the final version of the strain data over this period with improved calibration and better subtraction of excess noise, which has been publicly released. We employ three matched-filter search pipelines for candidate identification, and estimate the probability of astrophysical origin for each candidate event. While GWTC-2 used a false alarm rate threshold of 2 per year, we include in GWTC-2.1, 1201 candidates that pass a false alarm rate threshold of 2 per day. We calculate the source properties of a subset of 44 high-significance candidates that have a probability of astrophysical origin greater than 0.5. Of these candidates, 36 have been reported in GWTC-2. We also calculate updated source properties for all binary black hole events previously reported in GWTC-1. If the eight additional high-significance candidates presented here are astrophysical, the mass range of events that are unambiguously identified as binary black holes (both objects ≥3M⊙) is increased compared to GWTC-2, with total masses from ∼14M⊙ for GW190924_021846 to ∼182M⊙ for GW190426_190642. Source properties calculated using our default prior suggest that the primary components of two new candidate events (GW190403_051519 and GW190426_190642) fall in the mass gap predicted by pair-instability supernova theory. We also expand the population of binaries with significantly asymmetric mass ratios reported in GWTC-2 by an additional two events (the mass ratio is less than 0.65 and 0.44 at 90% probability for GW190403_051519 and GW190917_114630 respectively), and find that two of the eight new events have effective inspiral spins χeff>0 (at 90% credibility), while no b

关键词： Gravitational wave sources Gravitational waves Astronomical black holes Binary stars Neutron stars & pulsars

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Tests of general relativity with binary black holes from the second LIGO-Virgo gravitational-wave transient catalog

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Physical Review D 2021年第12期103卷 122002-122002页

作者： R. Abbott T. D. Abbott S. Abraham F. Acernese K. Ackley A. Adams C. Adams R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith S. Akcay G. Allen A. Allocca P. A. Altin A. Amato S. Anand A. Ananyeva S. B. Anderson W. G. Anderson S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali S. Ascenzi G. Ashton S. M. Aston P. Astone F. Aubin P. Aufmuth K. AultONeal C. Austin V. Avendano S. Babak F. Badaracco M. K. M. Bader S. Bae A. M. Baer S. Bagnasco J. Baird M. Ball G. Ballardin S. W. Ballmer A. Bals A. Balsamo G. Baltus S. Banagiri D. Bankar R. S. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo S. Barnum F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley M. Bazzan B. R. Becher B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene D. Beniwal M. G. Benjamin R. Benkel T. F. Bennett J. D. Bentley F. Bergamin B. K. Berger G. Bergmann S. Bernuzzi C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser R. Bhandare A. V. Bhandari D. Bhattacharjee J. Bidler I. A. Bilenko G. Billingsley R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht M. Bitossi M.-A. Bizouard J. K. Blackburn J. Blackman C. D. Blair D. G. Blair R. M. Blair O. Blanch F. Bobba N. Bode M. Boer Y. Boetzel G. Bogaert M. Boldrini F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom S. Borhanian R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs F. Brighenti A. Brillet M. Brinkmann R. Brito P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz A. Buikema T. Bulik H. J. Bulten A. Buonanno D. Buskulic R. L. Byer M. Cabero L. Cadonati M. Caesar G. Cagnoli C. Cahillane J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. B. Camp M. Canepa K. C. Cannon H. Cao J. Cao G. Cara LIGO California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia Christopher Newport University Newport News Virginia 23606 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration and Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gran Sasso Science Institute (GSSI) I-67100 L’Aquila Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi Italy INFN Sezione di Pisa I-56127 Pisa Italy Università di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India NCSA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière F-69622 Villeurbanne France University of Wisconsin-Milwaukee Milwaukee Wisconsin 53201 USA SUPA University of Strathclyde Glasgow G1 1XQ United Kingdom Dipartimento di Matematica e Informatica Università di Udine I-33100 Udine Italy INFN Sezione di Trie

Gravitational waves enable tests of general relativity in the highly dynamical and strong-field regime. Using events detected by LIGO-Virgo up to 1 October 2019, we evaluate the consistency of the data with predictions from the theory. We first establish that residuals from the best-fit waveform are consistent with detector noise, and that the low- and high-frequency parts of the signals are in agreement. We then consider parametrized modifications to the waveform by varying post-Newtonian and phenomenological coefficients, improving past constraints by factors of ∼2; we also find consistency with Kerr black holes when we specifically target signatures of the spin-induced quadrupole moment. Looking for gravitational-wave dispersion, we tighten constraints on Lorentz-violating coefficients by a factor of ∼2.6 and bound the mass of the graviton to mg≤1.76×10−23 eV/c2 with 90% credibility. We also analyze the properties of the merger remnants by measuring ringdown frequencies and damping times, constraining fractional deviations away from the Kerr frequency to δf^220=0.03−0.35+0.38 for the fundamental quadrupolar mode, and δf^221=0.04−0.32+0.27 for the first overtone; additionally, we find no evidence for postmerger echoes. Finally, we determine that our data are consistent with tensorial polarizations through a template-independent method. When possible, we assess the validity of general relativity based on collections of events analyzed jointly. We find no evidence for new physics beyond general relativity, for black hole mimickers, or for any unaccounted systematics.

关键词： Classical black holes General relativity Gravitational wave detection Gravitational waves Astronomical black holes

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All-sky search in early O3 LIGO data for continuous gravitational-wave signals from unknown neutron stars in binary systems

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Physical Review D 2021年第6期103卷 064017-064017页

作者： R. Abbott T. D. Abbott S. Abraham F. Acernese K. Ackley A. Adams C. Adams R. X. Adhikari V. B. Adya C. Affeldt D. Agarwal M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith K. M. Aleman G. Allen A. Allocca P. A. Altin A. Amato S. Anand A. Ananyeva S. B. Anderson W. G. Anderson S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert K. Arai M. C. Araya J. S. Areeda M. Arène N. Arnaud S. M. Aronson K. G. Arun Y. Asali G. Ashton S. M. Aston P. Astone F. Aubin P. Aufmuth K. AultONeal C. Austin S. Babak F. Badaracco M. K. M. Bader S. Bae A. M. Baer S. Bagnasco Y. Bai J. Baird M. Ball G. Ballardin S. W. Ballmer M. Bals A. Balsamo G. Baltus S. Banagiri D. Bankar R. S. Bankar J. C. Barayoga C. Barbieri B. C. Barish D. Barker P. Barneo S. Barnum F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett M. A. Barton I. Bartos R. Bassiri A. Basti M. Bawaj J. C. Bayley A. C. Baylor M. Bazzan B. Bécsy V. M. Bedakihale M. Bejger I. Belahcene V. Benedetto D. Beniwal M. G. Benjamin T. F. Bennett J. D. Bentley M. BenYaala F. Bergamin B. K. Berger S. Bernuzzi D. Bersanetti A. Bertolini J. Betzwieser R. Bhandare A. V. Bhandari D. Bhattacharjee S. Bhaumik J. Bidler I. A. Bilenko G. Billingsley R. Birney O. Birnholtz S. Biscans M. Bischi S. Biscoveanu A. Bisht B. Biswas M. Bitossi M.-A. Bizouard J. K. Blackburn J. Blackman C. D. Blair D. G. Blair R. M. Blair F. Bobba N. Bode M. Boer G. Bogaert M. Boldrini F. Bondu E. Bonilla R. Bonnand P. Booker B. A. Boom R. Bork V. Boschi N. Bose S. Bose V. Bossilkov V. Boudart Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady A. Bramley A. Branch M. Branchesi J. E. Brau M. Breschi T. Briant J. H. Briggs A. Brillet M. Brinkmann P. Brockill A. F. Brooks J. Brooks D. D. Brown S. Brunett G. Bruno R. Bruntz J. Bryant A. Buikema T. Bulik H. J. Bulten A. Buonanno R. Buscicchio D. Buskulic R. L. Byer L. Cadonati M. Caesar G. Cagnoli C. Cahillane H. W. Cain, III J. Calderón Bustillo J. D. Callaghan T. A. Callister E. Calloni J. B. Camp M. Canepa M. Cannavacciuolo K. C. Canno LIGO Laboratory California Institute of Technology Pasadena California 91125 USA Louisiana State University Baton Rouge Louisiana 70803 USA Inter-University Centre for Astronomy and Astrophysics Pune 411007 India Dipartimento di Farmacia Università di Salerno I-84084 Fisciano Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 Victoria Australia Christopher Newport University Newport News Virginia 23606 USA LIGO Livingston Observatory Livingston Louisiana 70754 USA OzGrav Australian National University Canberra Australian Capital Territory 0200 Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) D-30167 Hannover Germany Leibniz Universität Hannover D-30167 Hannover Germany University of Cambridge Cambridge CB2 1TN United Kingdom Theoretisch-Physikalisches Institut Friedrich-Schiller-Universität Jena D-07743 Jena Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston Illinois 60208 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom Gran Sasso Science Institute (GSSI) I-67100 L’Aquila Italy INFN Laboratori Nazionali del Gran Sasso I-67100 Assergi Italy INFN Sezione di Pisa I-56127 Pisa Italy Università di Pisa I-56127 Pisa Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India California State University Fullerton Fullerton California 92831 USA NCSA University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Università di Napoli “Federico II” Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière

Rapidly spinning neutron stars are promising sources of continuous gravitational waves. Detecting such a signal would allow probing of the physical properties of matter under extreme conditions. A significant fraction of the known pulsar population belongs to binary systems. Searching for unknown neutron stars in binary systems requires specialized algorithms to address unknown orbital frequency modulations. We present a search for continuous gravitational waves emitted by neutron stars in binary systems in early data from the third observing run of the Advanced LIGO and Advanced Virgo detectors using the semicoherent, GPU-accelerated, binaryskyhough pipeline. The search analyzes the most sensitive frequency band of the LIGO detectors, 50–300 Hz. Binary orbital parameters are split into four regions, comprising orbital periods of three to 45 days and projected semimajor axes of two to 40 light seconds. No detections are reported. We estimate the sensitivity of the search using simulated continuous wave signals, achieving the most sensitive results to date across the analyzed parameter space.

关键词： Gravitational wave detection Gravitational wave sources Gravitational waves Binary stars Neutron stars & pulsars

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Erratum: 'First Search for Gravitational Waves from Known Pulsars with Advanced LIGO' (2017, ApJ, 839, 12)

引用

The Astrophysical Journal 2017年第1期851卷

作者： B. P. Abbott R. Abbott T. D. Abbott M. R. Abernathy F. Acernese K. Ackley C. Adams T. Adams P. Addesso R. X. Adhikari V. B. Adya C. Affeldt M. Agathos K. Agatsuma N. Aggarwal O. D. Aguiar L. Aiello A. Ain P. Ajith B. Allen A. Allocca P. A. Altin A. Ananyeva S. B. Anderson W. G. Anderson S. Appert K. Arai M. C. Araya J. S. Areeda N. Arnaud K. G. Arun S. Ascenzi G. Ashton M. Ast S. M. Aston P. Astone P. Aufmuth C. Aulbert A. Avila-Alvarez S. Babak P. Bacon M. K. M. Bader P. T. Baker F. Baldaccini G. Ballardin S. W. Ballmer J. C. Barayoga S. E. Barclay B. C. Barish D. Barker F. Barone B. Barr L. Barsotti M. Barsuglia D. Barta J. Bartlett I. Bartos R. Bassiri A. Basti J. C. Batch C. Baune V. Bavigadda M. Bazzan C. Beer M. Bejger I. Belahcene M. Belgin A. S. Bell B. K. Berger G. Bergmann C. P. L. Berry D. Bersanetti A. Bertolini J. Betzwieser S. Bhagwat R. Bhandare I. A. Bilenko G. Billingsley C. R. Billman J. Birch R. Birney O. Birnholtz S. Biscans A. Bisht M. Bitossi C. Biwer M. A. Bizouard J. K. Blackburn J. Blackman C. D. Blair D. G. Blair R. M. Blair S. Bloemen O. Bock M. Boer G. Bogaert A. Bohe F. Bondu R. Bonnand B. A. Boom R. Bork V. Boschi S. Bose Y. Bouffanais A. Bozzi C. Bradaschia P. R. Brady V. B. Braginsky M. Branchesi J. E. Brau T. Briant A. Brillet M. Brinkmann V. Brisson P. Brockill J. E. Broida A. F. Brooks D. A. Brown D. D. Brown N. M. Brown S. Brunett C. C. Buchanan A. Buikema T. Bulik H. J. Bulten A. Buonanno D. Buskulic C. Buy R. L. Byer M. Cabero L. Cadonati G. Cagnoli C. Cahillane J. Calderón Bustillo T. A. Callister E. Calloni J. B. Camp M. Canepa K. C. Cannon H. Cao J. Cao C. D. Capano E. Capocasa F. Carbognani S. Caride J. Casanueva Diaz C. Casentini S. Caudill M. Cavaglià F. Cavalier R. Cavalieri G. Cella C. B. Cepeda L. Cerboni Baiardi G. Cerretani E. Cesarini S. J. Chamberlin M. Chan S. Chao P. Charlton E. Chassande-Mottin B. D. Cheeseboro H. Y. Chen Y. Chen H.-P. Cheng A. Chincarini A. Chiummo T. Chmiel H. S. Cho M. Cho J. H. Chow N. Christensen Q. Chu A. J. K. Chua S. Chua S. Chung G. C LIGO California Institute of Technology Pasadena CA 91125 USA Louisiana State University Baton Rouge LA 70803 USA American University Washington DC 20016 USA Università di Salerno Fisciano I-84084 Salerno Italy INFN Sezione di Napoli Complesso Universitario di Monte S.Angelo I-80126 Napoli Italy University of Florida Gainesville FL 32611 USA LIGO Livingston Observatory Livingston LA 70754 USA Laboratoire d'Annecy-le-Vieux de Physique des Particules (LAPP) Université Savoie Mont Blanc CNRS/IN2P3 F-74941 Annecy-le-Vieux France University of Sannio at Benevento I-82100 Benevento Italy and INFN Sezione di Napoli I-80100 Napoli Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-30167 Hannover Germany Nikhef Science Park 1098 XG Amsterdam The Netherlands LIGO Massachusetts Institute of Technology Cambridge MA 02139 USA Instituto Nacional de Pesquisas Espaciais 12227-010 São José dos Campos São Paulo Brazil INFN Gran Sasso Science Institute I-67100 L'Aquila Italy INFN Sezione di Roma Tor Vergata I-00133 Roma Italy Inter-University Centre for Astronomy and Astrophysics Pune 411007 India International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India University of Wisconsin–Milwaukee Milwaukee WI 53201 USA Leibniz Universität Hannover D-30167 Hannover Germany Università di Pisa I-56127 Pisa Italy INFN Sezione di Pisa I-56127 Pisa Italy Australian National University Canberra Australian Capital Territory 0200 Australia California State University Fullerton Fullerton CA 92831 USA LAL Univ. Paris-Sud CNRS/IN2P3 Université Paris-Saclay F-91898 Orsay France Chennai Mathematical Institute Chennai 603103 India Università di Roma Tor Vergata I-00133 Roma Italy Universität Hamburg D-22761 Hamburg Germany INFN Sezione di Roma I-00185 Roma Italy Albert-Einstein-Institut Max-Planck-Institut für Gravitationsphysik D-14476 Potsdam-Golm Germany APC AstroParticule et Cosmologie Un

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