Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 99: Neutrino Astronomy 4

T 99.8: Vortrag

Donnerstag, 24. März 2022, 18:05–18:20, T-H30

Investigation of the effect of elliptical orbits in supermassive binary black holes at the example of the neutrino lightcurve of the blazar TXS0506+056 — •Johannes Just, Julia Becker Tjus, and Ilja Jaroschewski — Theoretische Physik IV, Ruhr-Universität Bochum

IceCube detections from 2014/15 and 2017 show two possible high-energy neutrino correlations with the blazar TXS0506+056, making blazars promising candidates for high-energy neutrino emission. Those neutrinos can be produced in pp or pγ interactions of cosmic rays, making bazars possible sources of high energy cosmic rays. Two separate detections might imply a periodicity of the neutrino flux from TXS0506+056 at Earth.

Such a periodicity can be explained by a precession of the heavier super massive black hole jet in a merger of a super massive binary black hole (SMBBH), caused by a Spin-Flip of the Jet. Considering the post newtonian mechanics up to the 2.5 order, the Spin-Flip-Phenomenon is described with the Spin (and therefore the Jet) slowly aligning with the total angular momentum.

Assuming that TXS0506+056 is a SMBBH merger, this work predicts the upcoming neutrino flux as well as the observability of the emitted gravitational waves with LISA, taking different eccentricities of the SMBBH orbit into account. Several eccentricities, leading to differing periodicities and shrinking timescales, are discussed.