HE6 - Cosmic Ray Acceleration, Radiation and Neutrinos in Extragalactic Jets |
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Speaker |
Kun, Emma |
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Coauthors |
Biermann, Peter L.; Gergely, Árpád László |
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Radio and high-energy neutrino emission of the blazar PKS 0723-008 |
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Abstract |
In the emerging multi-messenger era of astronomy, the origin of cosmic high-energy (HE) neutrinos detected by the IceCube Neutrino Observatory stays in the forefront of interest of both astronomy and particle physics communities. We identify the source of the HE neutrino event ID5 as the blazar PKS 0723-008. This blazar exhibited a fivefold increase in its radio flux density through the last decade, indicating the plowing of a new jet channel four years before the HE neutrino emission and increasing ever since. We propose a scenario of binary supermassive black hole (SMBH) evolution leading to the observed HE neutrino emissions. I discuss mechanisms of related gravitational wave (GW), neutrino and electromagnetic emission from the coalescence of a binary SMBH and its afterlife. Identification of these sources, beside sought-for HE neutrino detections, is also important for breaking degeneracies in GW parameter estimation and in calibrating the expected abundance of these GW sources. |
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