Heidelberg 2022 – wissenschaftliches Programm
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EP: Fachverband Extraterrestrische Physik
EP 11: Astroparticles: From the source to the detector (joint session EP/T)
EP 11.4: Vortrag
Donnerstag, 24. März 2022, 17:00–17:15, EP-H1
Neutrino Emission during Supermassive and stellar mass Binary Black Hole Mergers — •Ilja Jaroschewski1, Julia Becker Tjus1, and Peter L. Biermann2,3 — 1Theoretische Physik IV, Ruhr-Universität Bochum — 2MPI for Radioastr., Bonn — 3Dept. of Phys. & Astron., Univ. Alabama, Tuscaloosa, AL, USA
Ever since the discovery of a diffuse astrophysical neutrino flux by IceCube, the question arose which sources contribute most. With several neutrino-blazar associations since the first high-probability association of such a neutrino to the blazar TXS 0506+056 in 2017, there is an indication that at least a non-negligible part of this diffuse neutrino flux emerges from blazars.
As over ninety stellar mass binary black hole mergers were already detected via gravitational waves (GWs), with more to come, there are strong indications that supermassive black holes (SMBHs) in galaxy centers, and thus blazars, also merge and have had at least one merger in their lifetime. Such a merger is almost always accompanied by a change of observable jet direction, leading to interactions of a preceding jet with surrounding molecular clouds and neutrino productions.
By creating a connection between neutrinos and GWs, we set limits on how much energy can be emitted in form of neutrinos in each merger of binary SMBHs and stellar mass black holes and estimate their contributions to the diffuse neutrino flux that is measured by IceCube. As neutrino production is directly connected to high energy cosmic ray interactions, the contribution of these sources to the cosmic ray injection rate is established.