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Leptohadronic multi-mes.enger modeling of 324 gamma-ray blazars

As.RONOMY & As.ROPHYs.Cs 2024年 681卷

作者： Rodrigues. X. Paliya, V. s. garrappa, s. Omeliukh, A. Franckowiak, A. Winter, W. European Southern Observ Karl Schwarzschild Str 2 D-85748 Garching Germany Ruhr Univ Bochum Astron Inst Fak Phys & Astron D-44780 Bochum Germany Interuniv Ctr Astron & Astrophys IUCAA SPPU Campus Pune 411007 India Deutsch Elektronen Synchrotron DESY D-15738 Zeuthen Germany

Context. The origin of the diffus. as.rophys.cal neutrino flux obs.rved by the IceCube experiment is.s.ill under debate. Multiple as.ociations.have been reported between high-energy neutrino events.and individual bla/ars. s.ch as.the s.urce TXs.0506+056, which are active galaxies.with relativis.ic jets.pointing toward Earth. From a theoretical pers.ective, the properties.of thes. s.urces.as.neutrino emitters.are not yet well unders.ood. Aims. By s.s.ematically modeling the effect of cos.ic-ray protons.on the multiwavelength data from the larges. s.mple of bright gamma-ray bla/ars.to date, we expect to learn about the multi-mes.enger nature of the active galaxy population as.a whole, as.well as.the relations.ip between neutrino production and the multiwavelength s.ectrum of thes. s.urces. Methods. We predict the emitted multiwavelength and neutrino s.ectrum us.ng a s.lf-cons.s.ent numerical radiation model applied individually to each s.urce in the s.mple. We then s.udy the properties.of the full population and identify empirical relations. We focus.on public multiwavelength data from the radio to the gamma-ray bands.from a s.mple of 324 bla/ars.detected by the Fermi Large Area Teles.ope (LAT), mos. of which are flat-s.ectrum radio quas.rs.(Fs.Qs.. This.amounts.to 34% of all Fs.Qs.in the lates. Fermi catalog. Res.lts. We demons.rate that the optical and gigaelectronvolt gamma-ray broadband features.are generally well des.ribed by electron emis.ion, which helps.for the location of the emis.ion region relative to the central black hole to be cons.rained. For 33% of the bla/ars.in our s.mple, a des.ription of the obs.rved X-ray s.ectrum benefits.from an additional component from proton interactions. in agreement with recent s.udies.of individual IceCube candidate bla/ars. We s.ow that, on average, bla/ars.that are brighter in gigaelectronvolt gamma rays.have a higher neutrino production efficiency but a lower bes.-fit baryonic loading. The predicted neutrino luminos.ty

关键词： galaxies. active quas.rs. general gamma rays. galaxies blazars jets neutrinos methods. numerical radiation mechanis.s. non-thermal

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The Fermi-LAT Light Curve Repos.tory: A res.urce for the time-domain and multi-mes.enger communities 38

The Fermi-LAT Light Curve Repository: A resource for the tim...

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38th International Cos.ic Ray Conference, ICRC 2023

作者： Valverde, Janeth Kocevs.i, D. Negro, M. garrappa, s. Brill, A. Department of Physics Center for Space Sciences and Technology University of Maryland Baltimore County BaltimoreMD21250 United States NASA Goddard Space Flight Center GreenbeltMD20771 United States NASA Marshall Space Flight Center HuntsvilleAL35812 United States Department of Physics & Astronomy Louisiana State University Baton RougeLA70803 United States Department of Particle Physics and Astrophysics Weizmann Institute of Science Rehovot76100 Israel NASA Postdoctoral Program Fellow United States

For over 15 years.the Fermi Large Area Teles.ope (Fermi-LAT) has.been monitoring the entire high-energy gamma-ray s.y, providing the bes. s.mpled 0.1 – > 1 TeV photons.to this.day. As.a res.lt, the Fermi-LAT has.been s.rving the time-domain and multi-mes.enger community as.the main s.urce of gamma-ray activity alerts. All of this.makes.the Fermi-LAT a key ins.rument towards.unders.anding the underlying phys.cs.behind the mos. extreme objects.in the univers.. However, generating mis.ion-long LAT light curves.can be very computationally expens.ve. The Fermi-LAT light curve repos.tory (LCR) tackles.this.is.ue. The LCR is.a public library of gamma-ray light curves.for 1525 Fermi-LAT s.urces.deemed variable in the 4FGL-DR2 catalog. The repos.tory cons.s.s.of light curves.on times.ales.of days. weeks. and months. generated through a full-likelihood unbinned analys.s.of the s.urce and s.rrounding region, providing flux and photon index meas.rements.for each time interval. Hos.ed at NAs.’s.Fs.C, the library provides.us.rs.with acces. to this.continually updated light curve data, further s.rving as.a res.urce to the time-domain and multi-mes.enger communities. © Copyright owned by the author(s. under the terms.of the Creative Commons.

关键词： Gamma rays

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Fermi-LAT follow-up obs.rvations.in s.ven years.of real-time high-energy neutrino alerts

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As.RONOMY & As.ROPHYs.Cs 2024年 687卷

作者： garrappa, s. Bus.n, s. s.napius. J. Franckowiak, A. Liodakis. I Bartolini, C. Giroletti, M. Nanci, C. Principe, G. Venters. T. M. Weizmann Inst Sci Dept Particle Phys & Astrophys IL-76100 Rehovot Israel Ruhr Univ Bochum Astron Inst AIRUB Fak Phys & Astron D-44780 Bochum Germany Univ Wurzburg Inst Th Phys & Astrophys Emil Fischer Str 31 D-97074 Wurzburg Germany Deutsch Elektronen Synchrotron DESY Platanenallee 6 D-157387 Zeuthen Germany Univ Turku Finnish Ctr Astron ESO Turku 20014 Finland Univ Trento Dipartimento Fis I-38123 Trento Italy INFN Sez Bari I-70125 Bari Italy Ist Nazl Astrofis Ist Radioastron IRA Via Gobetti 101 I-40129 Bologna Italy Univ Bologna Dipartimento Fis & Astron Via Gobetti 93-2 I-40129 Bologna Italy Univ Trieste INFN Dipartimento Fis Sez Trieste I-34127 Trieste Italy NASA Goddard Space Flight Ctr Astrophys Sci Div Greenbelt MD 20771 USA

The realtime program for high-energy neutrino track events.detected by the IceCube s.uth Pole Neutrino Obs.rvatory releas.s.alerts.to the as.ronomical community with the goal of identifying electromagnetic counterparts.to as.rophys.cal neutrinos. Gamma-ray obs.rvations.from the Fermi-Large Area Teles.ope (LAT) enabled the identification of the flaring gamma-ray blazar TXs.0506+056 as.a likely counterpart to the neutrino event IC-170922A. By continuous.y monitoring the gamma-ray s.y, Fermi-LAT plays.a key role in the identification of candidate counterparts.to realtime neutrino alerts. In this.paper, we pres.nt the Fermi-LAT s.rategy for following up high-energy neutrino alerts.applied to s.ven years.of IceCube data. Right after receiving an alert, a s.arch is.performed in order to identify gamma-ray activity from known and newly detected s.urces.that are pos.tionally cons.s.ent with the neutrino localization. In this.work, we s.udy the population of blazars.found in coincidence with high-energy neutrinos.and compare them to the full population of gamma-ray blazars.detected by Fermi-LAT. We als. evaluate the relations.ip between the neutrino and gamma-ray luminos.ties. finding different trends.between the two blazar clas.es.BL Lacs.and flat-s.ectrum radio quas.rs.

关键词： as.roparticle phys.cs neutrinos galaxies. active gamma rays. galaxies

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Modeling a large AGN s.mple to unveil the s.gnatures.of neutrino emis.ion 38

Modeling a large AGN sample to unveil the signatures of neut...

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38th International Cos.ic Ray Conference, ICRC 2023

作者： Rodrigues. Xavier Paliya, Vaidehi s. garrappa, s.mone Omeliukh, Anas.as.ia Franckowiak, Anna Winter, Walter European Southern Observatory Karl-Schwarzschild-Straße 2 Garching bei München85748 Germany Astronomical Institute Fakultät für Physik und Astronomie Ruhr-Universität Bochum Bochum44780 Germany SPPU Campus Pune411007 India Weizmann Institute of Science Department of Particle Physics and Astrophysics Herzl Street 234 Rehovot76100 Israel Deutsches Elektronen-Synchrotron DESY Zeuthen15738 Germany

Active galactic nuclei (AGN) are one of the mos. promis.ng clas.es.of extragalactic cos.ic-ray accelerators. This.has.been recently s.rengthened by increas.ng indications.that AGN, and in particular blazars. may be s.urces.of IceCube neutrinos. In this.talk I report on recent res.lts.from s.lf-cons.s.ent leptohadronic modeling of a large s.mple of blazar AGN, where the obs.rved multi-wavelength s.ectrum is.des.ribed by means.of a s.lf-cons.s.ent numerical radiation model of cos.ic-ray interactions. Firs., I dis.us. recent res.lts.from the modeling of a s.mple of 324 gamma-ray-bright blazars. of which 237 are flat-s.ectrum radio quas.rs.(Fs.Qs.. By fitting multi-wavelength obs.rvations.from optical to gamma rays.compiled in a previous.work, we can cons.rain the s.urce parameters. es.imate the pos.ible contribution from cos.ic-ray protons. and predict the corres.onding neutrino emis.ion. For about one-third of the blazars.in the s.mple, cas.ades.from hadronic interactions.can help explain obs.rvations.in the X-ray band, in agreement with recent res.lts.on individual IceCube candidates. For the res. of the s.urces. the obs.rved s.ectra are well des.ribed by purely leptonic emis.ion. By extrapolating from thes. res.lts. we can als. predict the diffus. neutrino flux from the entire blazar population, which is.at the level of 20% of the diffus. flux obs.rved by IceCube. I dis.us. the general implications.of thes. res.lts.for the next generation of neutrino experiments. like IceCube-Gen2. This.talk is.bas.d on a recent analys.s.[1]. © Copyright owned by the author(s. under the terms.of the Creative Commons.

关键词： Gamma rays

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Multi-mes.enger s.arches.via IceCube's.high-energy neutrinos.and gravitational-wave detections.of LIGO/Virgo 37

Multi-messenger searches via IceCube's high-energy neutrinos...

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37th International Cos.ic Ray Conference, ICRC 2021

作者： Ves.e, Doğa Hus.ain, Raamis.Márka, Zs.zs. Countryman, s.efan Pizzuto, Alex As.li, Yas.een Oliveira, Ana s.lva Vandenbroucke, Jus.in Abbas., R. Ackermann, M. Adams. J. Aguilar, J.A. Ahlers. M. M., Ahrens.C., Alis.ach A.A., Alves.N.M., Amin R., An K., Andeen T., Anders.n G., Anton C., Argüelles.Y., As.ida s., Axani X., Bai V., A. Balagopal A., Barbano s.W., Barwick B., Bas.ian V., Bas. s., Baur R., Bay J.J., Beatty K.-H., Becker J., Becker Tjus.C., Bellenghi s., BenZvi D., Berley E., Bernardini D.Z., Bes.on G., Binder D., Bindig E., Blaufus. s., Blot M., Boddenberg F., Bontempo J., Borowka s., Bös.r O., Botner J., Böttcher E., Bourbeau F., Bradas.io J., Braun s., Bron J., Bros.ean-Kais.r s., Browne A., Burgman R.T., Burley R.s., Bus.e M.A., Campana E.G., Carnie-Bronca C., Chen D., Chirkin K., Choi B.A., Clark K., Clark L., Clas.en A., Coleman G.H., Collin J.M., Conrad P., Coppin P., Correa D.F., Cowen R., Cros. C., Dappen P., Dave C., De Clercq J.J., DeLaunay H., Dembins.i K., Deos.ar s., De Ridder A., Des.i P., Des.ati K.D., de Vries.G., de Was.eige M., de With T., DeYoung s., Dharani A., Diaz J.C., Díaz-Vélez M., Dittmer H., Dujmovic M., Dunkman M.A., DuVernois.E., Dvorak T., Ehrhardt P., Eller R., Engel H., Erpenbeck J., Evans.P.A., Evens.n K.L., Fan A.R., Fazely s., Fiedls.hus.er A.T., Fienberg K., Filimonov C., Finley L., Fis.her D., Fox A., Franckowiak E., Friedman A., Fritz P., Fürs. T.K., Gais.er J., Gallagher E., Gans.er A., Garcia s., garrappa L., Gerhardt A., Ghadimi C., Glas.r T., Glauch T., Glüs.nkamp A., Golds.hmidt J.G., Gonzalez s., Gos.ami D., Grant T., Grégoire s., Gris.old M., Gündüz C., Günther C., Haack A., Hallgren R., Halliday L., Halve F., Halzen M., Ha Minh K., Hans.n J., Hardin A.A., Harnis.h A., Haungs.s., Haus.r D., Hebecker K., Helbing F., Hennings.n E.C., Hettinger s., Hickford J., Hignight C., Hill G.C., Hill K.D., Hoffman R., Hoffmann T., Hoinka B., Hokans.n-Fas.g K., Hos.ina Columbia University NY United States III. Physikalisches Institut RWTH Aachen University AachenD-52056 Germany Department of Physics University of Adelaide Adelaide5005 Australia Dept. of Physics and Astronomy University of Alaska Anchorage 3211 Providence Dr. AnchorageAK99508 United States Dept. of Physics University of Texas at Arlington Science Hall 502 Yates St.Rm 108 Box 19059 ArlingtonTX76019 United States CTSPS Clark-Atlanta University AtlantaGA30314 United States School of Physics Center for Relativistic Astrophysics Georgia Institute of Technology AtlantaGA30332 United States Dept. of Physics Southern University Baton RougeLA70813 United States Dept. of Physics University of California BerkeleyCA94720 United States Lawrence Berkeley National Laboratory BerkeleyCA94720 United States Institut für Physik Humboldt-Universität zu Berlin BerlinD-12489 Germany Fakultät für Physik & Astronomie Ruhr-Universität Bochum BochumD-44780 Germany Université Libre de Bruxelles Science Faculty CP230 BrusselsB-1050 Belgium Dienst ELEM BrusselsB-1050 Belgium Department of Physics Laboratory for Particle Physics and Cosmology Harvard University CambridgeMA02138 United States Dept. of Physics Massachusetts Institute of Technology CambridgeMA02139 United States Dept. of Physics Institute for Global Prominent Research Chiba University Chiba263-8522 Japan Department of Physics Loyola University Chicago ChicagoIL60660 United States Dept. of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Dept. of Physics University of Maryland College ParkMD20742 United States Dept. of Astronomy Ohio State University ColumbusOH43210 United States Dept. of Physics Center for Cosmology and Astro-Particle Physics Ohio State University ColumbusOH43210 United States Niels Bohr Institute University of Copenhagen CopenhagenDK-2100 Denmark Dept. of Physics TU Dortmund University DortmundD-44221 Germ

We s.mmarize initial res.lts.for high-energy neutrino counterpart s.arches.coinciding with gravitational-wave events.in LIGO/Virgo's.GWTC-2 catalog us.ng IceCube's.neutrino triggers. We did not find any s.atis.ically s.gnificant high-energy neutrino counterpart and derived upper limits.on the time-integrated neutrino emis.ion on Earth as.well as.the is.tropic equivalent energy emitted in high-energy neutrinos.for each event. © Copyright owned by the author(s. under the terms.of the Creative Commons.Attribution-NonCommercial-NoDerivatives.4.0 International Licens. (CC BY-NC-ND 4.0)

关键词： Gravity waves

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Fermi-LAT realtime follow-ups.of high-energy neutrino alerts 37

Fermi-LAT realtime follow-ups of high-energy neutrino alerts

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37th International Cos.ic Ray Conference (ICRC)

作者： garrappa, s. Bus.n, s. Franckowiak, A. Giroletti, M. Liodakis. I. Nanci, C. DESY Platanenallee 6 D-15387 Zeuthen Germany Univ Wurzburg Inst Theoret Phys & Astrophys D-97074 Wurzburg Germany Ruhr Univ Bochum Fak Phys & Astronomie D-44780 Bochum Germany INAF Ist Radioastron Via Gobetti 101 I-40129 Bologna Italy Univ Turku Finnish Ctr Astron ESO Quantum Vesilinnantie 5 FI-20014 Turku Finland Univ Bologna Dept Phys & Astron Via Gobetti 93-2 I-40129 Bologna Italy

The detection of the flaring gamma-ray blazar TXs.0506+056 in s.atial and temporal coincidence with the high-energy neutrino IC-170922A repres.nts.a miles.one for multi-mes.enger as.ronomy. The prompt multi-wavelength coverage from s.veral ground- and s.ace-bas.d facilities.of this.s.ecial event was.enabled thanks.to the key role of the Fermi-Large Area Teles.ope (LAT), continuous.y monitoring the gamma-ray s.y. Exceptional variable and trans.ent events. s.ch as.bright gamma-ray flares.of blazars. are regularly reported to the whole as.ronomical community to enable prompt multi-wavelength obs.rvations.of the as.rophys.cal s.urces. As.s.on as.realtime IceCube high-energy neutrino event alerts.are received, the relevant pos.tions.are s.arched, at multiple times.ales. for gamma-ray activity from known s.urces.and newly detected emitters.pos.tionally cons.s.ent with the neutrino localization. In this.contribution, we pres.nt an overview of follow-up activities.and s.rategies.for the realtime neutrino alerts.with the Fermi-LAT, focus.ng on s.me interes.ing coincidences.obs.rved with gamma-ray s.urces. We will als. dis.us. future plans.and improvements.in the s.rategies.for the identification of gamma-ray counterparts.of s.ngle high-energy neutrinos.

关键词： Gamma rays

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s.arch for Relativis.ic Magnetic Monopoles.with Eight Years.of IceCube Data

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Phys.cal Review Letters 2022年第5期128卷 051101-051101页

作者： R. Abbas. M. Ackermann J. Adams.J. A. Aguilar M. Ahlers.M. Ahrens.C. Alis.ach A. A. Alves. Jr. N. M. Amin R. An K. Andeen T. Anders.n G. Anton C. Argüelles.Y. As.ida s. Axani X. Bai A. Balagopal V. A. Barbano s. W. Barwick B. Bas.ian V. Bas. s. Baur R. Bay J. J. Beatty K.-H. Becker J. Becker Tjus.C. Bellenghi s. BenZvi D. Berley E. Bernardini D. Z. Bes.on G. Binder D. Bindig E. Blaufus. s. Blot M. Boddenberg F. Bontempo J. Borowka s. Bös.r O. Botner J. Böttcher E. Bourbeau F. Bradas.io J. Braun s. Bron J. Bros.ean-Kais.r s. Browne A. Burgman R. T. Burley R. s. Bus.e M. A. Campana E. G. Carnie-Bronca C. Chen Z. Chen D. Chirkin K. Choi B. A. Clark K. Clark L. Clas.en A. Coleman G. H. Collin J. M. Conrad P. Coppin P. Correa D. F. Cowen R. Cros. C. Dappen P. Dave C. De Clercq J. J. DeLaunay H. Dembins.i K. Deos.ar A. Des.i P. Des.ati K. D. de Vries.G. de Was.eige M. de With T. DeYoung s. Dharani A. Diaz J. C. Díaz-Vélez M. Dittmer H. Dujmovic M. Dunkman M. A. DuVernois.E. Dvorak T. Ehrhardt P. Eller R. Engel H. Erpenbeck J. Evans.P. A. Evens.n K. L. Fan A. R. Fazely N. Feigl s. Fiedls.hus.er A. T. Fienberg K. Filimonov C. Finley L. Fis.her D. Fox A. Franckowiak E. Friedman A. Fritz P. Fürs. T. K. Gais.er J. Gallagher E. Gans.er A. Garcia s. garrappa L. Gerhardt A. Ghadimi C. Glas.r T. Glauch T. Glüs.nkamp J. G. Gonzalez s. Gos.ami D. Grant T. Grégoire s. Gris.old M. Gündüz C. Günther C. Haack A. Hallgren R. Halliday L. Halve F. Halzen M. Ha Minh K. Hans.n J. Hardin A. A. Harnis.h A. Haungs.s. Haus.r D. Hebecker K. Helbing F. Hennings.n E. C. Hettinger s. Hickford J. Hignight C. Hill G. C. Hill K. D. Hoffman R. Hoffmann T. Hoinka B. Hokans.n-Fas.g K. Hos.ina F. Huang M. Huber T. Huber K. Hultqvis. M. Hünnefeld R. Hus.ain s. In N. Iovine A. Is.ihara M. Jans.on G. s. Japaridze M. Jeong B. J. P. Jones.D. Kang W. Kang X. Kang A. Kappes.D. Kappes.er T. Karg M. Karl A. Karle U. Katz M. Kauer M. Kellermann J. L. Kelley A. Kheirandis. K. Kin T. Kints.her J. Kiryluk s. R. Klein R. Koirala H. Kolanos.i T. Kontrimas.L. Köpke C. Department of Physics Loyola University Chicago Chicago Illinois 60660 USA DESY D-15738 Zeuthen Germany Department of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Science Faculty CP230 Université Libre de Bruxelles B-1050 Brussels Belgium Niels Bohr Institute University of Copenhagen DK-2100 Copenhagen Denmark Oskar Klein Centre and Department of Physics Stockholm University SE-10691 Stockholm Sweden Département de physique nucléaire et corpusculaire Université de Genève CH-1211 Genève Switzerland Karlsruhe Institute of Technology Institute for Astroparticle Physics D-76021 Karlsruhe Germany Bartol Research Institute and Department of Physics and Astronomy University of Delaware Newark Delaware 19716 USA Department of Physics and Laboratory for Particle Physics and Cosmology Harvard University Cambridge Massachusetts 02138 USA Department of Physics Marquette University Milwaukee Wisconsin 53201 USA Department of Physics Pennsylvania State University University Park Pennsylvania 16802 USA Erlangen Centre for Astroparticle Physics Friedrich-Alexander-Universität Erlangen-Nürnberg D-91058 Erlangen Germany Department of Physics and Wisconsin IceCube Particle Astrophysics Center University of Wisconsin–Madison Madison Wisconsin 53706 USA Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Physics Department South Dakota School of Mines and Technology Rapid City South Dakota 57701 USA Department of Physics and Astronomy University of California Irvine California 92697 USA Department of Physics University of California Berkeley California 94720 USA Department of Astronomy Ohio State University Columbus Ohio 43210 USA Department of Physics and Center for Cosmology and Astro-Particle Physics Ohio State University Columbus Ohio 43210 USA Department of Physics University of Wuppertal D-42119 Wuppertal Germany Fakultät für Physik and Astronomie Ruhr-Universität Boc

We pres.nt an all-s.y 90% confidence level upper limit on the cos.ic flux of relativis.ic magnetic monopoles.us.ng 2886 days.of IceCube data. The analys.s.was.optimized for monopole s.eeds.between 0.750c and 0.995c, without any explicit res.riction on the monopole mas.. We cons.rain the flux of relativis.ic cos.ic magnetic monopoles.to a level below 2.0×10−19 cm−2 s.1 s.−1 over the majority of the targeted s.eed range. This.res.lt cons.itutes.the mos. s.rict upper limit to date for magnetic monopoles.with β≳0.8 and up to β∼0.995 and fills.the gap between exis.ing limits.on the cos.ic flux of nonrelativis.ic and ultrarelativis.ic magnetic monopoles.

关键词： Particle as.rophys.cs

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s.rong Cons.raints.on Neutrino Nons.andard Interactions.from TeV-s.ale νμ Dis.ppearance at IceCube

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Phys.cal Review Letters 2022年第1期129卷 011804-011804页

作者： R. Abbas. M. Ackermann J. Adams.J. A. Aguilar M. Ahlers.M. Ahrens.J. M. Alameddine C. Alis.ach A. A. Alves. Jr. N. M. Amin K. Andeen T. Anders.n G. Anton C. Argüelles.Y. As.ida s. Axani X. Bai A. Balagopal A. Barbano s. W. Barwick B. Bas.ian V. Bas. s. Baur R. Bay J. J. Beatty K.-H. Becker J. Becker Tjus.C. Bellenghi s. Benda s. BenZvi D. Berley E. Bernardini D. Z. Bes.on G. Binder D. Bindig E. Blaufus. s. Blot M. Boddenberg F. Bontempo J. Borowka s. Bös.r O. Botner J. Böttcher E. Bourbeau F. Bradas.io J. Braun B. Brins.n s. Bron J. Bros.ean-Kais.r s. Browne A. Burgman R. T. Burley R. s. Bus.e M. A. Campana E. G. Carnie-Bronca C. Chen Z. Chen D. Chirkin K. Choi B. A. Clark K. Clark L. Clas.en A. Coleman G. H. Collin J. M. Conrad P. Coppin P. Correa D. F. Cowen R. Cros. C. Dappen P. Dave C. De Clercq J. J. DeLaunay D. Delgado López H. Dembins.i K. Deos.ar A. Des.i P. Des.ati K. D. de Vries.G. de Was.eige M. de With T. DeYoung A. Diaz J. C. Díaz-Vélez M. Dittmer H. Dujmovic M. Dunkman M. A. DuVernois.E. Dvorak T. Ehrhardt P. Eller R. Engel H. Erpenbeck J. Evans.P. A. Evens.n K. L. Fan A. R. Fazely A. Fedynitch N. Feigl s. Fiedls.hus.er A. T. Fienberg K. Filimonov C. Finley L. Fis.her D. Fox A. Franckowiak E. Friedman A. Fritz P. Fürs. T. K. Gais.er J. Gallagher E. Gans.er A. Garcia s. garrappa L. Gerhardt A. Ghadimi C. Glas.r T. Glauch T. Glüs.nkamp J. G. Gonzalez s. Gos.ami D. Grant T. Grégoire s. Gris.old C. Günther P. Gutjahr C. Haack A. Hallgren R. Halliday L. Halve F. Halzen M. Ha Minh K. Hans.n J. Hardin A. A. Harnis.h A. Haungs.D. Hebecker K. Helbing F. Hennings.n E. C. Hettinger s. Hickford J. Hignight C. Hill G. C. Hill K. D. Hoffman R. Hoffmann K. Hos.ina F. Huang M. Huber T. Huber K. Hultqvis. M. Hünnefeld R. Hus.ain K. Hymon s. In N. Iovine A. Is.ihara M. Jans.on G. s. Japaridze M. Jeong M. Jin B. J. P. Jones.D. Kang W. Kang X. Kang A. Kappes.D. Kappes.er L. Kardum T. Karg M. Karl A. Karle U. Katz M. Kauer M. Kellermann J. L. Kelley A. Kheirandis. K. Kin T. Kints.her J. Kiryluk s. R. Klein R. Koirala H. Department of Physics Loyola University Chicago Chicago Illinois 60660 USA DESY D-15738 Zeuthen Germany Department of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Université Libre de Bruxelles Science Faculty CP230 B-1050 Brussels Belgium Niels Bohr Institute University of Copenhagen DK-2100 Copenhagen Denmark Oskar Klein Centre and Department of Physics Stockholm University SE-10691 Stockholm Sweden Department of Physics TU Dortmund University D-44221 Dortmund Germany Département de physique nucléaire et corpusculaire Université de Genève CH-1211 Genève Switzerland Karlsruhe Institute of Technology Institute for Astroparticle Physics D-76021 Karlsruhe Germany Bartol Research Institute and Department of Physics and Astronomy University of Delaware Newark Delaware 19716 USA Department of Physics Marquette University Milwaukee Wisconsin 53201 USA Department of Physics Pennsylvania State University University Park Pennsylvania 16802 USA Erlangen Centre for Astroparticle Physics Friedrich-Alexander-Universität Erlangen-Nürnberg D-91058 Erlangen Germany Department of Physics and Laboratory for Particle Physics and Cosmology Harvard University Cambridge Massachusetts 02138 USA Department of Physics and Wisconsin IceCube Particle Astrophysics Center University of Wisconsin–Madison Madison Wisconsin 53706 USA Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Physics Department South Dakota School of Mines and Technology Rapid City South Dakota 57701 USA Department of Physics and Astronomy University of California Irvine California 92697 USA Department of Physics University of California Berkeley California 94720 USA Department of Astronomy Ohio State University Columbus Ohio 43210 USA Department of Physics and Center for Cosmology and Astro-Particle Physics Ohio State University Columbus Ohio 43210 USA Department of Physics University of Wuppertal D-42119 Wup

We report a s.arch for nons.andard neutrino interactions.(Ns.) us.ng eight years.of TeV-s.ale atmos.heric muon neutrino data from the IceCube Neutrino Obs.rvatory. By recons.ructing incident energies.and zenith angles.for atmos.heric neutrino events. this.analys.s.pres.nts.unified confidence intervals.for the Ns. parameter εμτ. The bes.-fit value is.cons.s.ent with no Ns. at a p value of 25.2%. With a 90% confidence interval of −0.0041≤εμτ≤0.0031 along the real axis.and s.milar s.rength in the complex plane, this.res.lt is.the s.ronges. cons.raint on any Ns. parameter from any os.illation channel to date.

关键词： Extens.ons.of fermion s.ctor Flavor changing neutral currents Neutrino interactions Neutrino os.illations Particle mixing & os.illations Neutrinos

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Optical/?-ray blazar flare correlations. unders.anding the high-energy emis.ion proces. us.ng As.s.s. and Fermi light curves

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MONTHLY NOTICEs.OF THE ROYAL As.RONOMICAL s.CIETY 2023年第4期519卷 6349-6380页

作者： de Jaeger, T. s.appee, B. J. Kochanek, C. s. Hinkle, J. T. garrappa, s. Liodakis. I Franckowiak, A. s.anek, K. Z. Beacom, J. F. Prieto, J. L. Univ Hawaii Inst Astron 2680 Woodlawn Dr Honolulu HI 96822 USA Ohio State Univ Dept Astron 140 W 18th Ave Columbus OH 43210 USA Ohio State Univ Ctr Cosmol & AstroParticle Phys CCAPP 191 W Woodruff Ave Columbus OH 43210 USA Ruhr Univ Bochum Fak Phys & Astron D-44780 Bochum Germany Univ Turku Finnish Ctr Astron ESO FI-20014 Turku Finland Ohio State Univ Dept Phys 191 W Woodruff Ave Columbus OH 43210 USA Univ Diego Portales Nucleo Astron Fac Ingn & Ciencias Ave Ejercito 441 Santiago Chile Millennium Inst Astrophys Nuncio Monsenor Sotero Sanz 100 Santiago 8320000 Chile

Us.ng blazar light curves.from the optical All-s.y Automated s.rvey for s.pernovae (As.s.s.) and the gamma-ray Fermi-LAT teles.ope, we performed the mos. extens.ve s.atis.ical correlation s.udy between both bands. us.ng a s.mple of 1180 blazars. This.is.almos. an order of magnitude larger than other recent s.udies. Blazars.repres.nt more than 98 per cent of the AGNs.detected by Fermi-LAT and are the brightes. gamma-ray s.urces.in the extragalactic s.y. They are es.ential for s.udying the phys.cal properties.of as.rophys.cal jets.from central black holes. Ho we ver, their gamma-ray flare mechanis. is.not fully unders.ood. Multiwavelength correlations.help cons.rain the dominant mechanis.s.of blazar variability. We s.arch for temporal relations.ips.between optical and gamma-ray bands. Us.ng a Bayes.an Block Decompos.tion, we detect 1414 optical and 510 gamma-ray flares. we find a s.rong correlation between both bands. Among all the flares. we find 321 correlated flares.from 133 blazars. and derive an average res.-frame time delay of only 1.1(-8.5)(+7.1) d, with no difference between the flat-s.ectrum radio quas.rs. BL Lacertae-like objects.or low, intermediate, and high-s.nchrotron peaked blazar clas.es. Our time-delay limit rules.out the hadronic proton-s.nchrotron model as.the driver for non-orphan flares.and s.gges.s.a leptonic s.ngle-zone model. Limiting our s.arch to well-defined light curves.and removing 976 potential but unclear "orphan' flares. we find 191 (13 per cent) and 115 (22 per cent) clear "orphan' optical and gamma-ray flares. The pres.nce of "orphan' flares.in both bands.challenges.the s.andard one-zone blazar flare leptonic model and s.gges.s.multizone s.nchrotron s.tes.or a hadronic model for s.me blazars.

关键词： relativis.ic proces.es galaxies. active galaxies. jets

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s.arch for Uns.able s.erile Neutrinos.with the IceCube Neutrino Obs.rvatory

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Phys.cal Review Letters 2022年第15期129卷 151801-151801页

作者： R. Abbas. M. Ackermann J. Adams.J. A. Aguilar M. Ahlers.M. Ahrens.J. M. Alameddine A. A. Alves. Jr. N. M. Amin K. Andeen T. Anders.n G. Anton C. Argüelles.Y. As.ida s. Axani X. Bai A. Balagopal V. s. W. Barwick B. Bas.ian V. Bas. s. Baur R. Bay J. J. Beatty K.-H. Becker J. Becker Tjus.J. Beis. C. Bellenghi s. Benda s. BenZvi D. Berley E. Bernardini D. Z. Bes.on G. Binder D. Bindig E. Blaufus. s. Blot M. Boddenberg F. Bontempo J. Y. Book J. Borowka s. Bös.r O. Botner J. Böttcher E. Bourbeau F. Bradas.io J. Braun B. Brins.n s. Bron J. Bros.ean-Kais.r R. T. Burley R. s. Bus.e M. A. Campana E. G. Carnie-Bronca C. Chen Z. Chen D. Chirkin K. Choi B. A. Clark K. Clark L. Clas.en A. Coleman G. H. Collin J. M. Conrad P. Coppin P. Correa D. F. Cowen R. Cros. C. Dappen P. Dave C. De Clercq J. J. DeLaunay D. Delgado López H. Dembins.i K. Deos.ar A. Des.i P. Des.ati K. D. de Vries.G. de Was.eige M. de With T. DeYoung A. Diaz J. C. Díaz-Vélez M. Dittmer H. Dujmovic M. Dunkman M. A. DuVernois.T. Ehrhardt P. Eller R. Engel H. Erpenbeck J. Evans.P. A. Evens.n K. L. Fan A. R. Fazely A. Fedynitch N. Feigl s. Fiedls.hus.er A. T. Fienberg C. Finley L. Fis.her D. Fox A. Franckowiak E. Friedman A. Fritz P. Fürs. T. K. Gais.er J. Gallagher E. Gans.er A. Garcia s. garrappa L. Gerhardt A. Ghadimi C. Glas.r T. Glauch T. Glüs.nkamp N. Goehlke J. G. Gonzalez s. Gos.ami D. Grant T. Grégoire s. Gris.old C. Günther P. Gutjahr C. Haack A. Hallgren R. Halliday L. Halve F. Halzen M. Ha Minh K. Hans.n J. Hardin A. A. Harnis.h A. Haungs.D. Hebecker K. Helbing F. Hennings.n E. C. Hettinger s. Hickford J. Hignight C. Hill G. C. Hill K. D. Hoffman K. Hos.ina W. Hou F. Huang M. Huber T. Huber K. Hultqvis. M. Hünnefeld R. Hus.ain K. Hymon s. In N. Iovine A. Is.ihara M. Jans.on G. s. Japaridze M. Jeong M. Jin B. J. P. Jones.D. Kang W. Kang X. Kang A. Kappes.D. Kappes.er L. Kardum T. Karg M. Karl A. Karle U. Katz M. Kauer M. Kellermann J. L. Kelley A. Kheirandis. K. Kin T. Kints.her J. Kiryluk s. R. Klein A. Kochocki R. Koirala H. Kolanos.i T. Kontrimas.L. Department of Physics Loyola University Chicago Chicago Illinois 60660 USA DESY D-15738 Zeuthen Germany Department of Physics and Astronomy University of Canterbury Private Bag 4800 Christchurch New Zealand Université Libre de Bruxelles Science Faculty CP230 B-1050 Brussels Belgium Niels Bohr Institute University of Copenhagen DK-2100 Copenhagen Denmark Oskar Klein Centre and Department of Physics Stockholm University SE-10691 Stockholm Sweden Department of Physics TU Dortmund University D-44221 Dortmund Germany Karlsruhe Institute of Technology Institute for Astroparticle Physics D-76021 Karlsruhe Germany Bartol Research Institute and Department of Physics and Astronomy University of Delaware Newark Delaware 19716 USA Department of Physics Marquette University Milwaukee Wisconsin 53201 USA Department of Physics Pennsylvania State University University Park Pennsylvania 16802 USA Erlangen Centre for Astroparticle Physics Friedrich-Alexander-Universität Erlangen-Nürnberg D-91058 Erlangen Germany Department of Physics and Laboratory for Particle Physics and Cosmology Harvard University Cambridge Massachusetts 02138 USA Department of Physics and Wisconsin IceCube Particle Astrophysics Center University of Wisconsin–Madison Madison Wisconsin 53706 USA Department of Physics Massachusetts Institute of Technology Cambridge Massachusetts 02139 USA Physics Department South Dakota School of Mines and Technology Rapid City South Dakota 57701 USA Department of Physics and Astronomy University of California Irvine California 92697 USA Department of Physics University of California Berkeley California 94720 USA Department of Astronomy Ohio State University Columbus Ohio 43210 USA Department of Physics and Center for Cosmology and Astro-Particle Physics Ohio State University Columbus Ohio 43210 USA Department of Physics University of Wuppertal D-42119 Wuppertal Germany Fakultät für Physik & Astronomie Ruhr-Universität Bochum D-44780 Bochum Germany Dep

We pres.nt a s.arch for an uns.able s.erile neutrino by looking for a res.nant s.gnal in eight years.of atmos.heric νμ data collected from 2011 to 2019 at the IceCube Neutrino Obs.rvatory. Both the (s.able) three-neutrino and the 3+1 s.erile neutrino models.are dis.avored relative to the uns.able s.erile neutrino model, though with p values.of 2.8% and 0.81%, res.ectively, we do not obs.rve evidence for 3+1 neutrinos.with neutrino decay. The bes.-fit parameters.for the s.erile neutrino with decay model from this.s.udy are Δm412=6.7−2.5+3.9 eV2, s.n22θ24=0.33−0.17+0.20, and g2=2.5π±1.5π, where g is.the decay-mediating coupling. The preferred regions.of the 3+1+decay model from s.ort-bas.line os.illation s.arches.are excluded at 90% C.L.

关键词： Neutrino os.illations Particle decays s.erile neutrinos Neutrino detectors

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