检索结果-内蒙古大学图书馆

Transverse momentum and centrality dependence of dihadron correlations in Au+Au collisions at sNN=200 GeV: Jet quenching and the response of partonic matter

引用

Physical Review C 2008年第1期77卷 011901(R)-011901(R)页

作者： A. Adare S. Afanasiev C. Aidala N. N. Ajitanand Y. Akiba H. Al-Bataineh J. Alexander A. Al-Jamel K. Aoki L. Aphecetche R. Armendariz S. H. Aronson J. Asai E. T. Atomssa R. Averbeck T. C. Awes B. Azmoun V. Babintsev G. Baksay L. Baksay A. Baldisseri K. N. Barish P. D. Barnes B. Bassalleck S. Bathe S. Batsouli V. Baublis F. Bauer A. Bazilevsky S. Belikov R. Bennett Y. Berdnikov A. A. Bickley M. T. Bjorndal J. G. Boissevain H. Borel K. Boyle M. L. Brooks D. S. Brown D. Bucher H. Buesching V. Bumazhnov G. Bunce J. M. Burward-Hoy S. Butsyk S. Campbell J.-S. Chai B. S. Chang J.-L. Charvet S. Chernichenko J. Chiba C. Y. Chi M. Chiu I. J. Choi T. Chujo P. Chung A. Churyn V. Cianciolo C. R. Cleven Y. Cobigo B. A. Cole M. P. Comets P. Constantin M. Csanád T. Csörgő T. Dahms K. Das G. David M. B. Deaton K. Dehmelt H. Delagrange A. Denisov D. d’Enterria A. Deshpande E. J. Desmond O. Dietzsch A. Dion M. Donadelli J. L. Drachenberg O. Drapier A. Drees A. K. Dubey A. Durum V. Dzhordzhadze Y. V. Efremenko J. Egdemir F. Ellinghaus W. S. Emam A. Enokizono H. En’yo B. Espagnon S. Esumi K. O. Eyser D. E. Fields M. Finger M. Finger Jr. F. Fleuret S. L. Fokin B. Forestier Z. Fraenkel J. E. Frantz A. Franz A. D. Frawley K. Fujiwara Y. Fukao S.-Y. Fung T. Fusayasu S. Gadrat I. Garishvili F. Gastineau M. Germain A. Glenn H. Gong M. Gonin J. Gosset Y. Goto R. Granier de Cassagnac N. Grau S. V. Greene M. Grosse Perdekamp T. Gunji H.-Å. Gustafsson T. Hachiya A. Hadj Henni C. Haegemann J. S. Haggerty M. N. Hagiwara H. Hamagaki R. Han H. Harada E. P. Hartouni K. Haruna M. Harvey E. Haslum K. Hasuko R. Hayano M. Heffner T. K. Hemmick T. Hester J. M. Heuser X. He H. Hiejima J. C. Hill R. Hobbs M. Hohlmann M. Holmes W. Holzmann K. Homma B. Hong T. Horaguchi D. Hornback M. G. Hur T. Ichihara K. Imai M. Inaba Y. Inoue D. Isenhower L. Isenhower M. Ishihara T. Isobe M. Issah A. Isupov B. V. Jacak J. Jia J. Jin O. Jinnouchi B. M. Johnson K. S. Joo D. Jouan F. Kajihara S. Kametani N. Kamihara J. Kamin M. Kaneta J. H. Kang H. Kanou T. Kawagishi D. Kawa University of Colorado Boulder Colorado 80309 USA Joint Institute for Nuclear Research Moscow Region RU-141980 Dubna Russia Columbia University New York New York 10027 and Nevis Laboratories Irvington New York 10533 USA Chemistry Department Stony Brook University SUNY Stony Brook New York 11794-3400 USA RIKEN The Institute of Physical and Chemical Research Wako Saitama 351-0198 Japan RIKEN BNL Research Center Brookhaven National Laboratory Upton New York 11973-5000 USA New Mexico State University Las Cruces New Mexico 88003 USA Kyoto University Kyoto 606-8502 Japan SUBATECH (Ecole des Mines de Nantes CNRS-IN2P3 Université de Nantes) BP 20722-44307 Nantes France Brookhaven National Laboratory Upton New York 11973-5000 USA Laboratoire Leprince-Ringuet Ecole Polytechnique CNRS-IN2P3 Route de Saclay F-91128 Palaiseau France Department of Physics and Astronomy Stony Brook University SUNY Stony Brook New York 11794 USA Oak Ridge National Laboratory Oak Ridge Tennessee 37831 USA IHEP Protvino State Research Center of Russian Federation Institute for High Energy Physics Protvino RU-142281 Russia Florida Institute of Technology Melbourne Florida 32901 USA Dapnia CEA Saclay F-91191 Gif-sur-Yvette France University of California–Riverside Riverside California 92521 USA Los Alamos National Laboratory Los Alamos New Mexico 87545 USA University of New Mexico Albuquerque New Mexico 87131 USA PNPI Petersburg Nuclear Physics Institute Gatchina Leningrad Region RU-188300 Russia Iowa State University Ames Iowa 50011 USA Saint Petersburg State Polytechnic University Saint Petersburg Russia Institut für Kernphysik University of Muenster D-48149 Muenster Germany KAERI Cyclotron Application Laboratory Seoul Korea Yonsei University IPAP Seoul 120-749 Korea KEK High Energy Accelerator Research Organization Tsukuba Ibaraki 305-0801 Japan University of Illinois at Urbana-Champaign Urbana Illinois 61801 USA Vanderbilt University Nashville Tennes

Azimuthal angle (Δϕ) correlations are presented for charged hadrons from dijets for 0.4<pT<10 GeV/c in Au+Au collisions at sNN=200 GeV. With increasing pT, the away-side distribution evolves from a broad and re...

Azimuthal angle (Δϕ) correlations are presented for charged hadrons from dijets for 0.4

关键词：

来源：评论

学校读者我要写书评

暂无评论

Evidence for a gamma-ray molecular target in the enigmatic PeVatron candidate LHAASO J2108+5157

arXiv

引用

arXiv 2023年

作者： de la Fuente, Eduardo Toledano-Juárez, Ivan Kawata, Kazumasa Trinidad, Miguel A. Yamagishi, Mitsuyosh Takekawa, Shunya Tafoya, Daniel Ohnishi, Munehiro Nishimura, Atsushi Kato, Sei Sako, Takashi Takita, Masato Sano, Hidetoshi Yadav, Ram K. Departamento de Física Centro Universitario de Ciencias Exactas e Ingenierías Universidad de Guadalajara Blvd. Marcelino García Barragán 1420 Jalisco Guadalajara44430 Mexico Institute for Cosmic Ray Research University of Tokyo Kashiwa277-8582 Japan Ciencias en Física Centro Universitario de Ciencias Exactas e Ingenierías Universidad de Guadalajara Blvd. Marcelino García Barragán 1420 Jalisco Guadalajara44430 Mexico Departamento de Astronomía Universidad de Guanajuato Apartado Postal 144 Guanajuato Guanajuato36000 Mexico Institute of Astronomy Graduate School of Science The University of Tokyo 2-21-1 Osawa Mitaka Tokyo181-0015 Japan Department of Applied Physics Faculty of Engineering Kanagawa University 3-27-1 Rokkakubashi Kanagawa-ku Kanagawa Yokohama221-8686 Japan Department of Space Earth and Enviroment Chalmers University of Technology Onsala Space Observatory 439 92 Sweden 462-2 Nobeyama Minamimaki Minamisaku Nagano384-1305 Japan Faculty of Engineering Gifu University 1-1 Yanagido Gifu501-1193 Japan 260 Moo 4 T. Donkaew A. Maerim Chiangmai50180 Thailand

Context. Peta-eV (PeV) astronomy emerged in 2021 with the discovery of ultra-high-energy gamma-ray sources associated with powerful natural particle accelerators known as PeVatrons. In order to determine the nature of their emission, namely whether it has a hadronic or leptonic origin, it is essential to characterise the physical parameters of the environment where it originates. Aims. We unambiguously confirm the association of molecular gas with the PeVatron candidate LHAASO J2108+5157 using unprecedented high angular-resolution (17′′) 12,13CO(J=1→0) observations carried out with the Nobeyama 45m radio telescope. Methods. We characterised a molecular cloud in the vicinity of the PeVatron candidate LHAASO J2108+5157 by determining its physical parameters from our 12,13CO(J=1→0) line observations. We used an updated estimation of the distance to the cloud, which provided a more reliable result. The molecular emission was compared with excess gamma-ray images obtained with FERMI-LAT at energies above 2 GeV to search for spatial correlations and test a possible hadronic (π0 decay) origin for the gamma-ray emission. Results. We find that the morphology of the spatial distribution of the CO emission is strikingly similar to that of the FERMI-LAT excess gamma ray. By combining our observations with archival 21cm HI line data, the nucleons (HI + H2) number density of the target molecular cloud is found to be 133.0 ± 45.0 cm−3, for the measured angular size of 0.55 ± 0.02◦ at a distance of 1.6 ± 0.1 kpc. The resulting total mass of the cloud is M(HI +H2) = 7.5±2.9×103 Mo. Under a hadronic scenario, we obtain a total energy of protons of Wp = 4.3±1.5 × 1046 erg with a cutoff of 700±300 TeV, which reproduces the sub-PeV gamma-ray emission. Conclusions. We identified a molecular cloud in the vicinity of LHAASO J2107+5157 as the main target where cosmic rays from an unknown PeVatron produce the observed gamma-ray emission via π0 decay. Copyright © 2023, The Authors. All rights

关键词： Clouds

来源：评论

学校读者我要写书评

暂无评论

TOI-1408: Discovery and Photodynamical Modeling of a Small Inner Companion to a Hot Jupiter Revealed by TTVs

arXiv

引用

arXiv 2024年

作者： Korth, Judith Chaturvedi, Priyanka Parviainen, Hannu Carleo, Ilaria Endl, Michael Guenther, Eike W. Nowak, Grzegorz Persson, Carina MacQueen, Phillip J. Mustill, Alexander J. Cabrera, Juan Cochran, William D. Lillo-Box, Jorge Hobbs, David Murgas, Felipe Greklek-McKeon, Michael Kellermann, Hanna Hébrard, Guillaume Fukui, Akihiko Pallé, Enric Jenkins, Jon M. Twicken, Joseph D. Collins, Karen A. Quinn, Samuel N. Šubjak, Ján Beck, Paul G. Gandolfi, Davide Mathur, Savita Deeg, Hans J. Latham, David W. Albrecht, Simon Barrado, David Boisse, Isabelle Bouy, Hervé Delfosse, Xavier Demangeon, Olivier García, Rafael A. Hatzes, Artie P. Heidari, Neda Ikuta, Kai Kabáth, Petr Knutson, Heather A. Livingston, John Martioli, Eder Morales-Calderón, María Morello, Giuseppe Narita, Norio Orell-Miquel, Jaume Osborne, Hanna L.M. Palakkatharappil, Dinil B. Pinter, Viktoria Redfield, Seth Relles, Howard M. Schwarz, Richard P. Seager, Sara Shporer, Avi Skarka, Marek Srdoc, Gregor Stangret, Monika Thomas, Luis Van Eylen, Vincent Watanabe, Noriharu Winn, Joshua N. Lund Observatory Division of Astrophysics Department of Physics Lund University Box 118 Lund22100 Sweden Thüringer Landessternwarte Tautenburg Sternwarte 5 Tautenburg07778 Germany Homi Bhabha Road Colaba Mumbai400005 India Tenerife La LagunaE-38206 Spain Tenerife La LagunaE-38205 Spain INAF – Osservatorio Astrofisico di Torino Via Osservatorio 20 Pino TorineseI-10025 Italy McDonald Observatory The University of Texas AustinTX United States Center for Planetary Systems Habitability The University of Texas AustinTX United States Institute of Astronomy Faculty of Physics Astronomy and Informatics Nicolaus Copernicus University Grudzį adzka 5 Toruń87-100 Poland Department of Space Earth and Environment Chalmers University of Technology Onsala Space Observatory OnsalaSE-439 92 Sweden Institut für Planetenforschung Deutsches Zentrum für Luft- und Raumfahrt Rutherfordstr. 2 Berlin12489 Germany CSIC-INTA Camino Bajo del Castillo s/n ESAC campus Villanueva de la Cañada Madrid28692 Spain Division of Geological and Planetary Sciences California Institute of Technology PasadenaCA91125 United States University Observatory Munich Faculty of Physics Ludwig-Maximilians-Universität München Scheinerstr. 1 Munich81679 Germany Institut d’astrophysique de Paris UMR7095 CNRS Université Pierre & Marie Curie 98bis boulevard Arago Paris75014 France Observatoire de Haute-Provence CNRS Université d’Aix-Marseille Saint-Michel-l’Observatoire 04870 France Komaba Institute for Science The University of Tokyo 3-8-1 Komaba Tokyo Meguro153-8902 Japan NASA Ames Research Center Moffett Field CA94035 United States SETI Institute Mountain ViewCA94043 United States Center for Astrophysics | Harvard & Smithsonian 60 Garden Street CambridgeMA02138 United States Astronomical Institute Czech Academy of Sciences Fričova 298 Ondřejov251 65 Czech Republic Dipartimento di Fisica Università degli Studi di Torino via Pietro Giuria 1 TorinoI-10125

We report the discovery and characterization of a small planet, TOI-1408 c, on a 2.2-day orbit located interior to a previously known hot Jupiter, TOI-1408 b (P=4.42 d, M=1.86±0.02MJup, R=2.4± 0.5RJup) that exhibits grazing transits. The two planets are near 2:1 period commensurability, resulting in significant transit timing variations (TTVs) for both planets and transit duration variations (TDVs) for the inner planet. The TTV amplitude for TOI-1408 c is 15% of the planet’s orbital period, marking the largest TTV amplitude relative to the orbital period measured to date. Photodynamical modeling of ground-based radial velocity (RV) observations and transit light curves obtained with the Transiting Exoplanet Survey Satellite (TESS) and ground-based facilities leads to an inner planet radius of 2.22 ±0.06R☉ and mass of 7.6 ±0.2M☉ that locates the planet into the Sub-Neptune regime. The proximity to the 2:1 period commensurability leads to the libration of the resonant argument of the inner planet. The RV measurements support the existence of a third body with an orbital period of several thousand days. This discovery places the system among the rare systems featuring a hot Jupiter accompanied by an inner low-mass planet. © 2024, CC BY.

关键词： Exoplanets

来源：评论

学校读者我要写书评

暂无评论

Balmer Break Galaxy Candidates at z ∼ 6: A Potential View on the Star Formation Activity at z ⪆ 14

引用

Astrophysical Journal 2020年第2期889卷 137-137页

作者： Mawatari, Ken Inoue, Akio K. Hashimoto, Takuya Silverman, John Kajisawa, Masaru Yamanaka, Satoshi Yamada, Toru Davidzon, Iary Capak, Peter Lin, Lihwai Hsieh, Bau-Ching Taniguchi, Yoshiaki Tanaka, Masayuki Ono, Yoshiaki Harikane, Yuichi Sugahara, Yuma Fujimoto, Seiji Nagao, Tohru Institute for Cosmic Ray Research University of Tokyo Chiba Kashiwa 277-8582 Japan Department of Environmental Science and Technology Faculty of Design Technology Osaka Sangyo University 3-1-1 Nakagaito Daito Osaka 574-8530 Japan Department of Physics School of Advanced Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo 169-8555 Japan Waseda Research Institute for Science and Engineering 3-4-1 Okubo Shinjuku Tokyo 169-8555 Japan Faculty of Science and Engineering Waseda University 3-4-1 Okubo Shinjuku Tokyo 169-8555 Japan National Astronomical Observatory of Japan Osawa 2-21-1 Mitaka Tokyo 181-8588 Japan Tomonaga Center for the History of the Universe (TCHoU) Faculty of Pure and Applied Sciences University of Tsukuba Ibaraki Tsukuba 305-8571 Japan Kavli Institute for the Physics and Mathematics of the Universe University of Tokyo Chiba Kashiwa 277-8583 Japan Research Center for Space and Cosmic Evolution Ehime University 2-5 Bunkyo-cho Ehime Matsuyama 790-8577 Japan Institute of Space Astronautical Science Japan Aerospace Exploration Agency Kanagawa Sagamihara 252-5210 Japan Astronomical Institute Tohoku University Aoba Aramaki Aoba-ku Miyagi Sendai 980-8578 Japan Infrared Processing and Analysis Center California Institute of Technology 770 S. Wilson Avenue Pasadena 91125 CA United States California Institute of Technology 1200 E. California Boulevard Pasadena 91125 CA United States Institute of Astronomy and Astrophysics Academia Sinica Taipei 106 Taiwan Open University of Japan 2-11 Wakaba Mihama-ku Chiba 261-8586 Japan Department of Physics Graduate School of Science University of Tokyo 7-3-1 Hongo Bunkyo Tokyo 113-0033 Japan

We search for galaxies with a strong Balmer break (Balmer break galaxies;BBGs) at z ∼ 6 over a 0.41 deg2 effective area in the COSMOS field. Based on rich imaging data, including data obtained with the Atacama Large ... 详细信息

We search for galaxies with a strong Balmer break (Balmer break galaxies;BBGs) at z ∼ 6 over a 0.41 deg² effective area in the COSMOS field. Based on rich imaging data, including data obtained with the Atacama Large Millimeter/submillimeter Array (ALMA), three candidates are identified by their extremely red K-[3.6] colors, as well as by nondetection in the X-ray, optical, far-infrared, and radio bands. The nondetection in the deep ALMA observations suggests that they are not dusty galaxies but BBGs at z ∼ 6, although contamination from active galactic nuclei at z ∼ 0 cannot be completely ruled out for the moment. Our spectral energy distribution analyses reveal that the BBG candidates at z ∼ 6 have stellar masses of ≈5 × 10¹⁰ M _o˙ dominated by old stellar populations with ages of ⪆ 700 Myr. Assuming that all three candidates are real BBGs at z ∼ 6, we estimate the stellar mass density to be 2.4-1.3 +2.3× 10-4,M Mpc^-3. This is consistent with an extrapolation from the lower-redshift measurements. The onset of star formation in the three BBG candidates is expected to be several hundred million yr before the observed epoch of z ∼ 6. We estimate the star formation rate density (SFRD) contributed by progenitors of the BBGs to be 2.4-12 × 10^-5 M _o˙ yr^-1 Mpc^-3 at z > 14 (99.7% confidence range). Our result suggests a smooth evolution of the SFRD beyond z = 8. © 2020. The American Astronomical Society. All rights reserved.

关键词： Galaxy formation Early universe Star formation High-redshift galaxies

来源：评论

学校读者我要写书评

暂无评论

All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data

引用

Physical Review D 2021年第8期104卷 082004-082004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 T. Akutsu K. M. Aleman G. Allen A. Allocca P. A. Altin A. Amato S. Anand A. Ananyeva S. B. Anderson W. G. Anderson M. Ando S. V. Angelova S. Ansoldi J. M. Antelis S. Antier S. Appert Koya Arai Koji Arai Y. Arai S. Araki A. Araya M. C. Araya J. S. Areeda M. Arène N. Aritomi N. Arnaud S. M. Aronson H. Asada Y. Asali G. Ashton Y. Aso S. M. Aston P. Astone F. Aubin P. Aufmuth K. AultONeal C. Austin S. Babak F. Badaracco M. K. M. Bader S. Bae Y. Bae A. M. Baer S. Bagnasco Y. Bai L. Baiotti J. Baird R. Bajpai 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 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. 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 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 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 Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan California State University Fullerton Fullerton California 92831 USA NCSA University of Illi

We report on an all-sky search for continuous gravitational waves in the frequency band 20–2000 Hz and with a frequency time derivative in the range of [−1.0,+0.1]×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 LIGO data from the first six months of Advanced LIGO’s and Advanced Virgo’s third observational run, O3. No periodic gravitational wave signals are observed, and 95% confidence-level (C.L.) frequentist upper limits are placed on their strengths. The lowest upper limits on worst-case (linearly polarized) strain amplitude h0 are ∼1.7×10−25 near 200 Hz. For a circularly polarized source (most favorable orientation), the lowest upper limits are ∼6.3×10−26. These strict frequentist upper limits refer to all sky locations and the entire range of frequency derivative values. For a population-averaged ensemble of sky locations and stellar orientations, the lowest 95% C.L. upper limits on the strain amplitude are ∼1.4×10−25. These upper limits improve upon our previously published all-sky results, with the greatest improvement (factor of ∼2) seen at higher frequencies, in part because quantum squeezing has dramatically improved the detector noise level relative to the second observational run, O2. These limits are the most constraining to date over most of the parameter space searched.

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

来源：评论

学校读者我要写书评

暂无评论

The complex variability of blazars: Time-scales and periodicity analysis in S4 0954+65

arXiv

引用

arXiv 2021年

作者： Raiteri, Claudia M. Villata, M. Larionov, V.M. Jorstad, S.G. Marscher, A.P. Weaver, Z.R. Acosta-Pulido, J.A. Agudo, I. Andreeva, T. Arkharov, A. Bachev, R. Benítez, E. Berton, M. Björklund, I. Borman, G.A. Bozhilov, V. Carnerero, M.I. Carosati, D. Casadio, C. Chen, W.P. Damljanovic, G. D'Ammando, F. Escudero, J. Fuentes, A. Giroletti, M. Grishina, T.S. Gupta, A.C. Hagen-Thorn, V.A. Hart, M. Hiriart, D. Hou, W.-J. Ivanov, D. Kim, J.-Y. Kimeridze, G.N. Konstantopoulou, C. Kopatskaya, E.N. Kurtanidze, O.M. Kurtanidze, S.O. Lähteenmäki, A. Larionova, E.G. Larionova, L.V. Marchili, N. Markovic, G. Minev, M. Morozova, D.A. Myserlis, I. Nakamura, M. Nikiforova, A.A. Nikolashvili, M.G. Otero-Santos, J. Ovcharov, E. Pursimo, T. Rahimov, I. Righini, S. Sakamoto, T. Savchenko, S.S. Semkov, E.H. Shakhovskoy, D. Sigua, L.A. Stojanovic, M. Strigachev, A. Thum, C. Tornikoski, M. Traianou, E. Troitskaya, Y.V. Troitskiy, I.S. Tsai, A. Valcheva, A. Vasilyev, A.A. Vince, O. Zaharieva, E. INAF Osservatorio Astrofisico di Torino via Osservatorio 20 Pino TorineseI-10025 Italy Astronomical Institute St. Petersburg State University Universitetskij Pr. 28 Petrodvorets St. Petersburg198504 Russia Pulkovo Observatory St.-Petersburg196140 Russia Institute for Astrophysical Research Boston University 725 Commonwealth Avenue BostonMA02215 United States Instituto de Astrofísica de Canarias Tenerife La LagunaE-38200 Spain Universidad de La Laguna Departamento de Astrofisica Tenerife La LagunaE38206 Spain Instituto de Astrofísica de Andalucía-CSIC Glorieta de la Astronomía s/n GranadaE-18008 Spain Institute of Applied Astronomy RAS Nab Kutuzova 10 St Petersburg191187 Russia Institute of Astronomy and National Astronomical Observatory Bulgarian Academy of Sciences 72 Tsarigradsko Shose Blvd. Sofia Bulgaria Universidad Nacional Autónoma de México Instituto de Astronomía AP 70-264 CDMX 04510 Mexico University of Turku University of Turku Quantum Vesilinnantie 5 20014 Finland Aalto University Metsähovi Radio Observatory Metsähovintie 114 Kylmälä02540 Finland Aalto University Department of Electronics and Nanoengineering P.O. BOX 15500 AALTOFI-00076 Finland Crimean Astrophysical Observatory RAS P/O Nauchny Crimea298409 Ukraine Department of Astronomy Faculty of Physics University of Sofia SofiaBG-1164 Bulgaria EPT Observatories La Palm TijarafeE-38780 Spain EPT Observatories La Palm TijarafeE-38780 Spain Foundation for Research and Technology - Hellas IESL & Institute of Astrophysics Voutes Heraklion7110 Greece Department of Physics University of Crete Heraklion71003 Greece Max Planck Institute for Radio Astronomy Auf dem Hügel 69 BonnD-53121 Germany Graduate Institute of Astronomy National Central University Zhongli Taoyuan32051 Taiwan Astronomical Observatory Volgina 7 Belgrade11060 Serbia INAF Istituto di Radioastronomia Via Gobetti 101 BolognaI-40129 Italy Manora Peak Nainital263001 India Universidad Na

Among active galactic nuclei, blazars show extreme variability properties. We here investigate the case of the BL Lac object S4 0954+65 with data acquired in 2019-2020 by the Transiting Exoplanet Survey Satellite (TESS) and by the Whole Earth Blazar Telescope (WEBT) Collaboration. The 2-min cadence optical light curves provided by TESS during three observing sectors of nearly one month each, allow us to study the fast variability in great detail. We identify several characteristic short-term time-scales, ranging from a few hours to a few days. However, these are not persistent, as they differ in the various TESS sectors. The long-term photometric and polarimetric optical and radio monitoring undertaken by the WEBT brings significant additional information, revealing that i) in the optical, long-term flux changes are almost achromatic, while the short-term ones are strongly chromatic;ii) the radio flux variations at 37 GHz follow those in the optical with a delay of about three weeks;iii) the range of variation of the polarization degree and angle is much larger in the optical than in the radio band, but the mean polarization angles are similar;iv) the optical long-term variability is characterized by a quasi-periodicity of about one month. We explain the source behaviour in terms of a rotating inhomogeneous helical jet, whose pitch angle can change in time. Copyright © 2021, The Authors. All rights reserved.

关键词： Polarization

来源：评论

学校读者我要写书评

暂无评论

Author Correction: Competition between magnetic interactions and structural instabilities leading to itinerant frustration in the triangular lattice antiferromagnet LiCrSe2

Communications Materials

引用

Communications Materials 2023年第1期4卷 1页

作者： Elisabetta Nocerino Nami Matsubara Martin Månsson Shintaro Kobayashi Catherine Witteveen Fabian O. von Rohr Ola K. Forslund Yasmine Sassa Chiu Tang Takeshi Matsukawa Akinori Hoshikawa Akihiro Koda Kazuyoshi Yoshimura Izumi Umegaki Vladimir Pomjakushin Jess H. Brewer Jun Sugiyama KTH Royal Institute of Technology Department of Applied Physics Alba Nova University Center Stockholm SE-114 21 Sweden Japan Synchrotron Radiation Research Institute (JASRI) 1-1-1 Kouto Sayo 679-5198 Japan Department of Quantum Matter Physics University of Geneva 24 Quai Ernest-Ansermet 1211 Geneva Switzerland Department of Physics University of Zürich Winterthurerstr. 190 8057 Zürich Switzerland Chalmers University of Technology Department of Physics Göteborg SE-412 96 Sweden Diamond House Harwell Science and Innovation Campus Fermi Ave Didcot OX11 0DE UK Frontier Research Center for Applied Atomic Sciences Ibaraki University 162-1 Shirakata Tokai Ibaraki 319-1106 Japan Muon Science Laboratory Institute of Materials Structure Science High Energy Accelerator Research Organization (KEK) Tokai Ibaraki 319-1106 Japan Department of Materials Structure Science The Graduate University for Advanced Studies Tsukuba Ibaraki 305-0801 Japan Department of Chemistry Graduate School of Science Kyoto University Kyoto 606-8502 Japan Muon Science Laboratory Institute of Materials Structure Science KEK Tokai Ibaraki 319-1106 Japan Laboratory for Neutron Scattering and Imaging Paul Scherrer Institute 5232 Villigen PSI Switzerland Department of Physics and Astronomy University of British Columbia Vancouver BC V6T 1Z1 Canada TRIUMF 4004 Wesbrook Mall Vancouver BC V6T 2A3 Canada Neutron Science and Technology Center Comprehensive Research Organization for Science and Society (CROSS) Tokai Ibaraki 319-1106 Japan Advanced Science Research Center Japan Atomic Energy Agency Tokai Ibaraki 319-1195 Japan

来源：评论

学校读者我要写书评

暂无评论

Search for Gravitational Waves Associated with Fast Radio Bursts Detected by CHIME/FRB during the LIGO-Virgo Observing Run O3a

引用

Astrophysical Journal 2023年第2期955卷 155-155页

作者： Abbott, R. Abbott, T.D. Acernese, F. Ackley, K. Adams, C. Adhikari, N. Adhikari, R.X. Adya, V.B. Affeldt, C. Agarwal, D. Agathos, M. Agatsuma, K. Aggarwal, N. Aguiar, O.D. Aiello, L. Ain, A. Ajith, P. Akutsu, T. Albanesi, S. Allocca, A. Altin, P.A. Amato, A. Anand, C. Anand, S. Ananyeva, A. Anderson, S.B. Anderson, W.G. Ando, M. Andrade, T. Andres, N. Andrić, T. Angelova, S.V. Ansoldi, S. Antelis, J.M. Antier, S. Appert, S. Arai, Koya Arai, Y. Araki, S. Araya, A. Araya, M.C. Areeda, J.S. Arène, M. Aritomi, N. Arnaud, N. Aronson, S.M. Arun, K.G. Asada, H. Asali, Y. Ashton, G. Aso, Y. Assiduo, M. Aston, S.M. Astone, P. Aubin, F. Austin, C. Babak, S. Badaracco, F. Bader, M.K.M. Badger, C. Bae, S. Bae, Y. Baer, A.M. Bagnasco, S. Bai, Y. Baiotti, L. Baird, J. Bajpai, R. Ball, M. Ballardin, G. Ballmer, S.W. Balsamo, A. Baltus, G. Banagiri, S. Bankar, D. Barayoga, J.C. Barbieri, C. Barish, B.C. Barker, D. Barneo, P. Barone, F. Barr, B. Barsotti, L. Barsuglia, M. Barta, D. Bartlett, J. Barton, M.A. Bartos, I. Bassiri, R. Basti, A. Bawaj, M. Bayley, J.C. Baylor, A.C. Bazzan, M. Bécsy, B. Bedakihale, V.M. Bejger, M. Belahcene, I. Benedetto, V. Beniwal, D. Bennett, T.F. Bentley, J.D. BenYaala, M. Bergamin, F. Berger, B.K. Bernuzzi, S. Berry, C.P.L. Bersanetti, D. Bertolini, A. Betzwieser, J. Beveridge, D. Bhandare, R. Bhardwaj, U. Bhattacharjee, D. Bhaumik, S. Bilenko, I.A. Billingsley, G. Bini, S. Birney, R. Birnholtz, O. Biscans, S. Bischi, M. Biscoveanu, S. Bisht, A. Biswas, B. Bitossi, M. Bizouard, M.-A. Blackburn, J.K. Blair, C.D. Blair, D.G. Blair, R.M. Bobba, F. Bode, N. Boer, M. Bogaert, G. Boldrini, M. Bonavena, L.D. Bondu, F. Bonilla, E. Bonnand, R. Booker, P. Boom, B.A. Bork, R. Boschi, V. Bose, N. Bose, S. Bossilkov, V. Boudart, V. Bouffanais, Y. Boumerdassi, A. Bozzi, A. Bradaschia, C. Brady, P.R. Bramley, A. Branch, A. Branchesi, M. Brau, J.E. Breschi, M. Briant, T. Briggs, J.H. Brillet, A. Brinkmann, M. Brockill, P. Brooks, A.F. Brooks, J. Brown, D.D. Brunett, S. Bruno, G. Bruntz, R. Bryant, J. Buchanan, J. B LIGO Laboratory California Institute of Technology Pasadena 91125 CA United States Louisiana State University Baton Rouge 70803 LA United States Dipartimento di Farmacia Università di Salerno Fisciano Salerno I-84084 Italy INFN Sezione di Napoli Complesso Universitario di Monte S. Angelo Napoli I-80126 Italy OzGrav School of Physics & Astronomy Monash University Clayton 3800 VIC Australia LIGO Livingston Observatory Livingston 70754 LA United States University of Wisconsin-Milwaukee Milwaukee 53201 WI United States OzGrav Australian National University Canberra 0200 ACT Australia Max Planck Institute for Gravitational Physics (Albert Einstein Institute) Hannover D-30167 Germany Leibniz Universität Hannover Hannover D-30167 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 Jena D-07743 Germany University of Birmingham Birmingham B15 2TT United Kingdom Center for Interdisciplinary Exploration & Research in Astrophysics (CIERA) Northwestern University Evanston 60208 IL United States Instituto Nacional de Pesquisas Espaciais São Paulo São José dos Campos 12227-010 Brazil Gravity Exploration Institute Cardiff University Cardiff CF24 3AA United Kingdom INFN Sezione di Pisa Pisa I-56127 Italy International Centre for Theoretical Sciences Tata Institute of Fundamental Research Bengaluru 560089 India Gravitational Wave Science Project National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan Advanced Technology Center National Astronomical Observatory of Japan (NAOJ) Mitaka City Tokyo 181-8588 Japan INFN Sezione di Torino Torino I-10125 Italy Università di Napoli “Federico II Complesso Universitario di Monte S. Angelo Napoli I-80126 Italy Université de Lyon Université Claude Bernard Lyon 1 CNRS Institut Lumière Matière Villeurbanne F-69622

We search for gravitational-wave (GW) transients associated with fast radio bursts (FRBs) detected by the Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst Project, during the first part of the third observing run of Advanced LIGO and Advanced Virgo (2019 April 1 15:00 UTC-2019 October 1 15:00 UTC). Triggers from 22 FRBs were analyzed with a search that targets both binary neutron star (BNS) and neutron star-black hole (NSBH) mergers. A targeted search for generic GW transients was conducted on 40 FRBs. We find no significant evidence for a GW association in either search. Given the large uncertainties in the distances of our FRB sample, we are unable to exclude the possibility of a GW association. Assessing the volumetric event rates of both FRB and binary mergers, an association is limited to 15% of the FRB population for BNS mergers or 1% for NSBH mergers. We report 90% confidence lower bounds on the distance to each FRB for a range of GW progenitor models and set upper limits on the energy emitted through GWs for a range of emission scenarios. We find values of order 10⁵¹-10⁵⁷ erg for models with central GW frequencies in the range 70-3560 Hz. At the sensitivity of this search, we find these limits to be above the predicted GW emissions for the models considered. We also find no significant coincident detection of GWs with the repeater, FRB 20200120E, which is the closest known extragalactic FRB. © 2023. The Author(s). Published by the American Astronomical Society.

关键词： Gravitational wave astronomy Radio transient sources

来源：评论

学校读者我要写书评

暂无评论

Erratum to: A combined treatment of hydration and dynamical effects for the modeling of host-guest binding thermodynamics: the SAMPL5 blinded challenge

引用

Journal of computer-aided molecular design 2017年第1期31卷 45页

作者： Rajat Kumar Pal Kamran Haider Divya Kaur William Flynn Junchao Xia Ronald M Levy Tetiana Taran Lauren Wickstrom Tom Kurtzman Emilio Gallicchio Department of Chemistry Brooklyn College 2900 Bedford Avenue Brooklyn NY 11210 USA. Ph.D. Program in Biochemistry The Graduate Center of the City University of New York New York NY 10016 USA. Department of Chemistry Lehman College The City University of New York 250 Bedford Park Blvd. West Bronx New York NY 10468 USA. Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY 10016 USA. Center for Biophysics and Computational Biology Institute of Computational Molecular Science and Department of Chemistry Temple University Philadelphia PA USA. Department of Physics and Astronomy Rutgers University Piscataway NJ 08854 USA. Borough of Manhattan Community College Department of Science The City University of New York 199 Chambers Street New York NY 10007 USA. Department of Chemistry Brooklyn College 2900 Bedford Avenue Brooklyn NY 11210 USA. egallicchio@brooklyn.cuny.edu. Ph.D. Program in Biochemistry The Graduate Center of the City University of New York New York NY 10016 USA. egallicchio@brooklyn.cuny.edu. Ph.D. Program in Chemistry The Graduate Center of the City University of New York New York NY 10016 USA. egallicchio@brooklyn.cuny.edu.

来源：评论

学校读者我要写书评

暂无评论

The MOPYS project: A survey of 70 planets in search of extended He i and H atmospheres No evidence of enhanced evaporation in young planets

arXiv

引用

arXiv 2024年

作者： Orell-Miquel, J. Murgas, F. Pallé, E. Mallorquín, M. López-Puertas, M. Lampón, M. Sanz-Forcada, J. Nortmann, L. Czesla, S. Nagel, E. Ribas, I. Stangret, M. Livingston, J. Knudstrup, E. Albrecht, S.H. Carleo, I. Caballero, J.A. Dai, F. Esparza-Borges, E. Fukui, A. Heng, K. Henning, Th. Kagetani, T. Lesjak, F. de Leon, J.P. Montes, D. Morello, G. Narita, N. Quirrenbach, A. Amado, P.J. Reiners, A. Schweitzer, A. Linares, J.I. Vico La Laguna Tenerife38205 Spain La Laguna Tenerife38206 Spain Glorieta de la Astronomía s/n GranadaE-18008 Spain Camino Bajo del Castillo s/n Villanueva de la Cañada MadridE-28692 Spain Institut für Astrophysik und Geophysik Georg-August-Universität Friedrich-Hund-Platz 1 Göttingen37077 Germany Thüringer Landessternwarte Tautenburg Sternwarte 5 Tautenburg07778 Germany Campus UAB Can Ma-grans s/n Bellaterra Barcelona08193 Spain Barcelona08034 Spain Osservatorio Astronomico di Padova Vicolo dell’Osservatorio 5 Padova35122 Italy Astrobiology Center 2-21-1 Osawa Mitaka Tokyo181-8588 Japan National Astronomical Observatory of Japan 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Astronomical Science Program Graduate University for Advanced Studies SOKENDAI 2-21-1 Osawa Mitaka Tokyo181-8588 Japan Department of Space Earth and Environment Chalmers University of Technology Gothenburg412 93 Sweden Stellar Astrophysics Centre Department of Physics and Astronomy Aarhus University Ny Munkegade 120 Aarhus CDK-8000 Denmark NASA Sagan Fellow United States Division of Geological and Planetary Sciences 1200 E California Blvd PasadenaCA91125 United States Department of Astronomy California Institute of Technology PasadenaCA91125 United States Komaba Institute for Science The University of Tokyo 3-8-1 Komaba Meguro Tokyo153-8902 Japan Faculty of Physics Ludwig Maximilian University Scheinerstrasse 1 Munich BavariaD-81679 Germany Max-Planck-Institute für Astronomie Königstuhl 17 HeidelbergD-69117 Germany Department of Multi-Disciplinary Sciences Graduate School of Arts and Sciences The University of Tokyo 3-8-1 Komaba Meguro Tokyo Japan Facultad de Ciencias Físicas Universidad Complutense de Madrid MadridE-28040 Spain Landessternwarte Zentrum für Astronomie der Universität Heidelberg Königstuhl 12 HeidelbergD-69117 Germany Hamburger Sternwarte Gojenbergsweg 112 Hamburg21029 Germany Centro Astronómico Hispano en Andalucía

During the first billion years of their life, exoplanet atmospheres are modified by different atmospheric escape phenomena that can strongly affect the shape and morphology of the exoplanet itself. These processes can be studied with Lyα, Hα, and/or He i triplet observations. We present high-resolution spectroscopy observations from CARMENES and GIARPS checking for He i and Hα signals in 20 exoplanetary atmospheres: V1298 Tau c, K2-100 b, HD 63433 b, HD 63433 c, HD 73583 b, HD 73583 c, K2-77 b, TOI-2076 b, TOI-2048 b, HD 235088 b, TOI-1807 b, TOI-1136 d, TOI-1268 b, TOI-1683 b, TOI-2018 b, MASCARA-2 b, WASP-189 b, TOI-2046 b, TOI-1431 b, and HAT-P-57 b. We report two new high-resolution spectroscopy He i detections for TOI-1268 b and TOI-2018 b, and a Hα detection for TOI-1136 d. Furthermore, we detect hints of He i for HD 63433 b, and Hα for HD 73583 b and c, which need to be confirmed. The aim of the Measuring Out-flows in Planets orbiting Young Stars (MOPYS) project is to understand the evaporating phenomena and test their predictions from the current observations. We compiled a list of 70 exoplanets with He i and/or Hα observations, from this work and the literature, and we considered the He i and Hα results as proxy for atmospheric escape. Our principal results are that 0.1–1Gyr planets do not exhibit more He i or Hα detections than older planets, and evaporation signals are more frequent for planets orbiting ∼1–3 Gyr stars. We provide new constraints to the cosmic shoreline, the empirical division between rocky planets and planets with atmosphere, by using the evaporation detections and we explore the capabilities of a new dimensionless parameter, RHe/RHill, to explain the He i triplet detections. Furthermore, we present a statistically significant upper boundary for the He i triplet detections in the Teq versus ρp parameter space. Planets located above that boundary are unlikely to show He i absorption signals. © 2024, CC BY.

关键词： Cosmology

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：