A Multimessenger Picture of the Flaring Blazar TXS 0506+056: Implications for High-energy Neutrino Emission and Cosmic-Ray Acceleration

被引：191

作者：

Keivani, A. ^{[1
,2
,17
]}

Murase, K. ^{[1
,2
,3
,4
]}

Petropoulou, M. ^{[5
]}

Fox, D. B. ^{[2
,3
,6
]}

Cenko, S. B. ^{[7
,8
]}

Chaty, S. ^{[9
]}

Coleiro, A. ^{[10
,11
]}

DeLaunay, J. J. ^{[1
,2
]}

Dimitrakoudis, S. ^{[12
]}

Evans, P. A. ^{[13
]}

Kennea, J. A. ^{[3
]}

Marshall, F. E. ^{[14
]}

Mastichiadis, A. ^{[15
]}

Osborne, J. P. ^{[13
]}

Santander, M. ^{[16
]}

Tohuvavohu, A. ^{[3
]}

Turley, C. F. ^{[1
,2
]}

机构：

[1] Penn State Univ, Dept Phys, 104 Davey Lab, University Pk, PA 16802 USA

[2] Penn State Univ, Inst Gravitat & Cosmos, Ctr Particle & Gravitat Astrophys, University Pk, PA 16802 USA

[3] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 USA

[4] Yukawa Inst Theoret Phys, Ctr Gravitat Phys, Kyoto, Kyoto 6068502, Japan

[5] Princeton Univ, Dept Astrophys Sci, Princeton, NJ 08544 USA

[6] Penn State Univ, Inst Gravitat & Cosmos, Ctr Theoret & Observat Cosmol, University Pk, PA 16802 USA

[7] NASA, Goddard Space Flight Ctr, Astrophys Sci Div, Mail Code 661, Greenbelt, MD 20771 USA

[8] Univ Maryland, Joint Space Sci Inst, College Pk, MD 20742 USA

[9] Univ Paris Diderot, CNRS, Dept Astrophys, CEA Saclay,Lab AIM,CEA,DRF,Irfu,UMR 7158, F-91191 Gif Sur Yvette, France

[10] Univ Paris Diderot, Sorbonne Paris Cite, CNRS, APC,IN2P3,CEA,Irfu,Obs Paris, Paris, France

[11] Univ Valencia, Inst Fis Corpuscular, CSIC, IFIC, Calle Catedratico Jose Beltran 2, E-46980 Valencia, Spain

[12] Univ Alberta, Dept Phys, Edmonton, AB T6G 2E1, Canada

[13] Univ Leicester, Dept Phys & Astron, Leicester LE1 7RH, Leics, England

[14] NASA, Goddard Space Flight Ctr, Mail Code 660-1, Greenbelt, MD 20771 USA

[15] Natl & Kapodistrian Univ Athens, Dept Phys, GR-15783 Zografos, Greece

[16] Univ Alabama, Dept Phys & Astron, Tuscaloosa, AL 35487 USA

[17] Columbia Univ, Dept Phys, 538 W 120th St, New York, NY 10027 USA

来源：

ASTROPHYSICAL JOURNAL | 2018年 / 864卷 / 01期

基金：

美国国家航空航天局; 美国国家科学基金会;

关键词：

Lacertae objects: general; BL Lacertae objects: individual (TXS 0506+056); galaxies: active; gamma rays: galaxies; neutrinos; radiation mechanisms: non-thermal; BL-LAC OBJECTS; GAMMA-RAYS; SWIFT; RADIATION; VARIABILITY; CALIBRATION; PROTONS; ORIGIN; FLARES; JET;

D O I：

10.3847/1538-4357/aad59a

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Detection of the IceCube-170922A neutrino coincident with the flaring blazar TXS 0506+056, the first and only similar to 3 sigma high-energy neutrino source association to date, offers a potential breakthrough in our understanding of high-energy cosmic particles and blazar physics. We present a comprehensive analysis of TXS. 0506+056 during its flaring state, using newly collected Swift, NuSTAR, and X-shooter data with Fermi observations and numerical models to constrain the blazar's particle acceleration processes and multimessenger (electromagnetic (EM) and high-energy neutrino) emissions. Accounting properly for EM cascades in the emission region, we find a physically consistent picture only within a hybrid leptonic scenario, with gamma-rays produced by external inverse-Compton processes and high-energy neutrinos via a radiatively subdominant hadronic component. We derive robust constraints on the blazar's neutrino and cosmic-ray emissions and demonstrate that, because of cascade effects, the 0.1-100 keV emissions of TXS. 0506+056 serve as a better probe of its hadronic acceleration and highenergy neutrino production processes than its GeV-TeV emissions. If the IceCube neutrino association holds, physical conditions in the TXS. 0506+056 jet must be close to optimal for high-energy neutrino production, and are not favorable for ultrahigh-energy cosmic-ray acceleration. Alternatively, the challenges we identify in generating a significant rate of IceCube neutrino detections from TXS. 0506+056 may disfavor single-zone models, in which.-rays and high-energy neutrinos are produced in a single emission region. In concert with continued operations of the high-energy neutrino observatories, we advocate regular X-ray monitoring of TXS. 0506+056 and other blazars in order to test single-zone blazar emission models, clarify the nature and extent of their hadronic acceleration processes, and carry out the most sensitive possible search for additional multimessenger sources.

引用

页数：16

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