Cosmic neutrinos from temporarily gamma-suppressed blazars

0546211 - FZÚ 2022 RIV US eng J - Článek v odborném periodiku
Kun, E. … celkem 6 autorů
Cosmic neutrinos from temporarily gamma-suppressed blazars.
Astrophysical Journal Letters. Roč. 911, č. 2 (2021), č. článku L18. ISSN 2041-8205. E-ISSN 2041-8213
Výzkumná infrastruktura: AUGER-CZ II - 90102
Klíčová slova: gamma-ray * neutrino emission
Obor OECD: Particles and field physics
Impakt faktor: 8.811, rok: 2021
Způsob publikování: Omezený přístup
https://www.doi.org/10.3847/2041-8213/abf1ec

Despite the uncovered association of a high-energy neutrino with the apparent flaring state of blazar TXS 0506+056 in 2017, the mechanisms leading to astrophysical particle acceleration and neutrino production are still uncertain. Recent studies found that when transparent to gamma-rays, gamma-flaring blazars do not have the opacity for protons to produce neutrinos. Here we present observational evidence for an alternative explanation, in which gamma-ray emission is suppressed during efficient neutrino production. A large proton and target photon density helps produce neutrinos while temporarily suppressing the observable gamma-emission due to a large gamma gamma opacity. We show that the Fermi-LAT gamma-flux of blazar PKS 1502+106 was at a local minimum when IceCube recorded the coincident high-energy neutrino IC-190730A.
Trvalý link: http://hdl.handle.net/11104/0322757