(MAGIC Collaboration) Ansoldi, S.; Antonelli, L. A.; Arcaro, C.; Baack, D.; Babić, Ana; Banerjee, B.; Bangale, P.; Barres de Almeida, U.; Barrio, J. A.; González, J. Becerra; Bednarek, W.; Bernardini, E.; Berse, R. Ch.; Berti, A.; Besenrieder, J.; Bhattacharyya, W.; Bigongiari, C.; Biland, A.; Blanch, O.; Bonnoli, G.; Carosi, R.; Ceribella, G.; Chatterjee, A.; Colak, S. M.; Colin, P.; Colombo, E.; Contreras, J. L.; Cortina, J.; Covino, S.; Cumani, P.; D’Elia, V.; Vela, P. Da; Dazzi, F.; Angelis, A. De; Lotto, B. De; Delfino, M.; Delgado, J.; Pierro, F. Di; Domínguez, A.; Prester Dominis, Dijana; Dorner, D.; Doro, M.; Einecke, S.; Elsaesser, D.; Ramazani, V. Fallah; Fattorini, A.; Fernández-Barral, A.; Ferrara, G.; Fidalgo, D.; Foffano, L.; Fonseca, M. V.; Font, L.; Fruck, C.; Gallozzi, S.; López, R. J. García; Garczarczyk, M.; Gaug, M.; Giammaria, P.; Godinović, Nikola; Guberman, D.; Hadasch, D.; Hahn, A.; Hassan, T.; Hayashida, M.; Herrera, J.; Hoang, J.; Hrupec, Dario; Inoue, S.; Ishio, K.; Iwamura, Y.; Konno, Y.; Kubo, H.; Kushida, J.; Lamastra, A.; Lelas, Damir; Leone, F.; Lindfors, E.; Lombardi, S.; Longo, F.; López, M.; Maggio, C.; Majumdar, P.; Makariev, M.; Maneva, G.; Manganaro, M.; Mannheim, K.; Maraschi, L.; Mariotti, M.; Martínez, M.; Masuda, S.; Mazin, D.; Mielke, K.; Minev, M.; Miranda, J. M.; Mirzoyan, R.; Moralejo, A.; Moreno, V.; Moretti, E.; Neustroev, V.; Niedzwiecki, A.; Rosillo, M. Nievas; Nigro, C.; Nilsson, K.; Ninci, D.; Nishijima, K.; Noda, K.; Nogués, L.; Paiano, S.; Palacio, J.; Paneque, D.; Paoletti, R.; Paredes, J. M.; Pedaletti, G.; Peñil, P.; Peresano, M.; Persic, M.; Pfrang, K.; Moroni, P. G. Prada; Prandini, E.; Puljak, Ivica; Garcia, J. R.; Rhode, W.; Ribó, M.; Rico, J.; Righi, C.; Rugliancich, A.; Saha, L.; Saito, T.; Satalecka, K.; Schweizer, T.; Sitarek, J.; Šnidarić, Iva; Sobczynska, D.; Stamerra, A.; Strzys, M.; Surić, Tihomir; Tavecchio, F.; Temnikov, P.; Terzić, Tomislav; Teshima, M.; Torres-Albá, N.; Tsujimoto, S.; Vanzo, G.; Acosta, M. Vazquez; Vovk, I.; Ward, J. E.; Will, M.; Zarić, Darko; Cerruti, Matteo (2018) The Blazar TXS 0506+056 Associated with a High-energy Neutrino: Insights into Extragalactic Jets and Cosmic-Ray Acceleration. The Astrophysical journal, 863 (1). ISSN 0004-637X
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Abstract
A neutrino with energy of ∼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 ∼ 3σ level. We monitored the object in the very-high-energy (VHE) band with the MAGIC telescopes for ∼41 hours 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 ∼ 10^45 − 4×10^46 erg s^{; ; ; −1}; ; ; . The steep spectrum observed by MAGIC is concordant with internal γγ absorption above ∼100 GeV entailed by photohadronic production of a ∼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 up-scattering 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 co-moving frame can be in the range ∼ 10^14 to 10^18 eV.
| Item Type: | Article | ||||||||
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| Uncontrolled Keywords: | BL Lacertae objects: individual (TXS 0506+056) ; cosmic rays ; galaxies: jets ; gamma rays: galaxies ; neutrinos ; radiation mechanisms: non-thermal | ||||||||
| Subjects: | NATURAL SCIENCES > Physics | ||||||||
| Divisions: | Division of Experimental Physics | ||||||||
| Projects: |
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| Depositing User: | Ana Babić | ||||||||
| Date Deposited: | 30 Nov 2018 13:55 | ||||||||
| URI: | http://fulir.irb.hr/id/eprint/4363 | ||||||||
| DOI: | 10.3847/2041-8213/aad083 |
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