Dissecting the region around IceCube-170922A: the blazar TXS 0506+056 as the first cosmic neutrino source

被引：130
作者：
Padovani, P. [1 ]
Giommi, P. [2 ,3 ,4 ]
Resconi, E. [5 ]
Glauch, T. [5 ]
Arsioli, B. [6 ,7 ]
Sahakyan, N. [8 ]
Huber, M. [5 ]
机构：
[1] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
[2] ASI, Via Politecn Snc, I-00133 Rome, Italy
[3] Tech Univ Munich, Inst Adv Studies, Lichtenbergstr 2a, D-85748 Garching, Germany
[4] ICRANet, Piazzale Repubbl 10, I-65122 Pescara, Italy
[5] Tech Univ Munich, Phys Dept, James Frank Str 1, D-85748 Garching, Germany
[6] Univ Estadual Campinas, Inst Fis Gleb Wataghin, R Sergio Buarque de Holanda 777, BR-13083859 Campinas, SP, Brazil
[7] ICRANet Rio, CBPF, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, Brazil
[8] ICRANet Armenia, Marshall Baghramian Ave 24a, Yerevan 0019, Armenia
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2018年 / 480卷 / 01期
基金：
巴西圣保罗研究基金会;
关键词：
neutrinos; radiation mechanisms: non-thermal; galaxies: active; BL Lacertae objects: general; gamma-rays: galaxies; SIMPLIFIED VIEW; X-RAY; BURST; COUNTERPARTS;
D O I：
10.1093/mnras/sty1852
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present the dissection in space, time, and energy of the region around the IceCube-170922A neutrino alert. This study is motivated by: (1) the first association between a neutrino alert and a blazar in a flaring state, TXS 0506+ 056; (2) the evidence of a neutrino flaring activity during 2014-2015 from the same direction; (3) the lack of an accompanying simultaneous gamma-ray enhancement from the same counterpart; (4) the contrasting flaring activity of a neighbouring bright gamma-ray source, the blazar PKS 0502+ 049, during 2014-2015. Our study makes use of multiwavelength archival data accessed through Open Universe tools and includes a new analysis of Fermi-LAT data. We find that PKS 0502+ 049 contaminates the gamma-ray emission region at low energies but TXS 0506+ 056 dominates the sky above a few GeV. TXS 0506+ 056, which is a very strong (top percent) radio and gamma-ray source, is in a high gamma-ray state during the neutrino alert but in a low though hard gamma-ray state in coincidence with the neutrino flare. Both states can be reconciled with the energy associated with the neutrino emission and, in particular during the low/hard state, there is evidence that TXS 0506+ 056 has undergone a hadronic flare with very important implications for blazar modelling. All multimessenger diagnostics reported here support a single coherent picture in which TXS 0506+ 056, a very high energy gamma-ray blazar, is the only counterpart of all the neutrino emissions in the region and therefore the most plausible first non-stellar neutrino and, hence, cosmic ray source.
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收藏
页码：192 / 203
页数：12
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