The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration

被引：82

作者：

Ansoldi, S. ^{[1
,2
,3
,4
,5
,6
]}

Antonelli, L. A. ^{[7
]}

Arcaro, C. ^{[8
,9
]}

Baack, D. ^{[10
]}

Babic, A. ^{[11
,12
,13
,14
,15
]}

Banerjee, B. ^{[16
]}

Bangale, P. ^{[17
]}

Barres de Almeida, U. ^{[17
,39
]}

Barrio, J. A. ^{[18
]}

Becerra Gonzalez, J. ^{[19
,20
]}

Bednarek, W. ^{[21
]}

Bernardini, E. ^{[8
,9
,22
,23
]}

Berse, R. Ch. ^{[10
]}

Berti, A. ^{[1
,2
,40
]}

Besenrieder, J. ^{[17
]}

Bhattacharyya, W. ^{[22
]}

Bigongiari, C. ^{[7
]}

Biland, A. ^{[24
]}

Blanch, O. ^{[25
]}

Bonnoli, G. ^{[26
,27
]}

Carosi, R. ^{[28
,29
]}

Ceribella, G. ^{[17
]}

Chatterjee, A. ^{[16
]}

Colak, S. M. ^{[25
]}

Colin, P. ^{[17
]}

Colombo, E. ^{[19
,20
]}

Contreras, J. L. ^{[18
]}

Cortina, J. ^{[25
]}

Covino, S. ^{[7
]}

Cumani, P. ^{[25
]}

D'Elia, V. ^{[7
]}

Da Vela, P. ^{[26
,27
]}

Dazzi, F. ^{[7
]}

De Angelis, A. ^{[8
,9
]}

De Lotto, B. ^{[1
,2
]}

Delfino, M. ^{[25
,41
]}

Delgado, J. ^{[25
]}

Di Pierro, F. ^{[8
,9
]}

Dominguez, A. ^{[18
]}

Prester, D. Dominis ^{[11
,12
,13
,14
,15
]}

Dorner, D. ^{[30
]}

Doro, M. ^{[8
,9
]}

Einecke, S. ^{[10
]}

Elsaesser, D. ^{[10
]}

Ramazani, V. Fallah ^{[31
,32
,33
]}

Fattorini, A. ^{[10
]}

Fernandez-Barral, A. ^{[8
,9
,25
]}

Ferrara, G. ^{[7
]}

Fidalgo, D. ^{[18
]}

Foffano, L. ^{[8
,9
]}

机构：

[1] Univ Udine, I-33100 Udine, Italy

[2] INFN Trieste, I-33100 Udine, Italy

[3] Univ Tokyo, Japanese MAGIC Consortium ICRR, Chiba 2778582, Japan

[4] Kyoto Univ, Dept Phys, Kyoto 6068502, Japan

[5] Tokai Univ, Tokyo, Kanagawa 2591292, Japan

[6] RIKEN, Wako, Saitama 3510198, Japan

[7] Natl Inst Astrophys INAF, I-00136 Rome, Italy

[8] Univ Padua, I-35131 Padua, Italy

[9] INFN, I-35131 Padua, Italy

[10] Tech Univ Dortmund, D-44221 Dortmund, Germany

[11] Univ Rijeka, Croatian MAGIC Consortium, Rijeka 51000, Croatia

[12] Univ Split, FESB, Split 51000, Croatia

[13] Univ Zagreb, FER, Zagreb 10000, Croatia

[14] Univ Osijek, Osijek 31000, Croatia

[15] Rudjer Boskovic Inst, Zagreb 10000, Croatia

[16] Saha Inst Nucl Phys, HBNI, 1 Bidhannagar,Salt Lake,Sect 1, Kolkata 700064, India

[17] Max Planck Inst Phys & Astrophys, D-80805 Munich, Germany

[18] Univ Complutense, Unidad Particulas & Cosmol UPARCOS, E-28040 Madrid, Spain

[19] Inst Astrofis Canarias, E-38200 San Cristobal la Laguna, Spain

[20] Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain

[21] Univ Lodz, Dept Astrophys, PL-90236 Lodz, Poland

[22] Deutsch Elektronen Synchrotron DESY, D-15738 Zeuthen, Germany

[23] Humboldt Univ, Inst Phys, D-12489 Berlin, Germany

[24] Swiss Fed Inst Technol, CH-8093 Zurich, Switzerland

[25] BIST, IFAE, E-08193 Bellaterra, Barcelona, Spain

[26] Univ Siena, I-53100 Siena, Italy

[27] INFN Pisa, I-53100 Siena, Italy

[28] Univ Pisa, I-56126 Pisa, Italy

[29] INFN Pisa, I-56126 Pisa, Italy

[30] Univ Wurzburg, D-97074 Wurzburg, Germany

[31] Univ Turku, Dept Phys & Astron, Finnish MAGIC Consortium, Tuorla Observ, FIN-20014 Turku, Finland

[32] Univ Turku, Finnish Ctr Astron ESO FINCA, FIN-20014 Turku, Finland

[33] Univ Oulu, Astron Div, FIN-90014 Oulu, Finland

[34] Univ Autonoma Barcelona, Dept Fis, E-08193 Bellaterra, Spain

[35] Univ Autonoma Barcelona, CERES, IEEC, E-08193 Bellaterra, Spain

[36] Bulgarian Acad Sci, Inst Nucl Res & Nucl Energy, BG-1784 Sofia, Bulgaria

[37] Univ Barcelona, IEEC, ICC, E-08028 Barcelona, Spain

[38] Univ Paris Diderot, Sorbonne Paris Cite, Sorbonne Univ, CNRS,LPNHE, F-75252 Paris, France

[39] URCA, CBPF, BR-22290180 Rio De Janeiro, RJ, Brazil

[40] Univ Trieste, Dipartimento Fis, I-34127 Trieste, Italy

[41] PIC, E-08193 Bellaterra, Barcelona, Spain

[42] Univ Bologna, INAF Trieste, Bologna, Italy

[43] Univ Bologna, Dept Phys & Astron, Bologna, Italy

来源：

ASTROPHYSICAL JOURNAL LETTERS | 2018年 / 863卷 / 01期

关键词：

BL Lacertae objects: individual (TXS 0506+056); cosmic rays; galaxies: jets; gamma rays: galaxies; neutrinos; radiation mechanisms: non-thermal; BL-LAC OBJECTS; STRUCTURED JETS; TELESCOPE;

D O I：

10.3847/2041-8213/aad083

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A neutrino with energy similar to 290 TeV, IceCube-170922A, was detected in coincidence with the BL Lac object TXS. 0506+056 during enhanced gamma-ray activity, with chance coincidence being rejected at similar to 3 sigma level. We monitored the object in the very-high-energy (VHE) band with the Major Atmospheric Gamma-ray Imaging Cherenkov (MAGIC) telescopes for similar to 41 hr from 1.3 to 40.4 days after the neutrino detection. Day-timescale variability is clearly resolved. We interpret the quasi-simultaneous neutrino and broadband electromagnetic observations with a novel one-zone lepto-hadronic model, based on interactions of electrons and protons co-accelerated in the jet with external photons originating from a slow-moving plasma sheath surrounding the faster jet spine. We can reproduce the multiwavelength spectra of TXS 0506+056 with neutrino rate and energy compatible with IceCube-170922A, and with plausible values for the jet power of similar to 10(45) - 4 x 10(46) erg s(-1). The steep spectrum observed by MAGIC is concordant with internal gamma gamma absorption above similar to 100 GeV entailed by photohadronic production of a similar to 290 TeV neutrino, corroborating a genuine connection between the multi-messenger signals. In contrast to previous predictions of predominantly hadronic emission from neutrino sources, the gamma-rays can be mostly ascribed to inverse Compton upscattering of external photons by accelerated electrons. The X-ray and VHE bands provide crucial constraints on the emission from both accelerated electrons and protons. We infer that the maximum energy of protons in the jet comoving frame can be in the range similar to 10(14) - 10(18) eV.

引用

页数：10

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