Bonn 2020 – scientific programme
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T: Fachverband Teilchenphysik
T 73: Multi-messenger astronomy
T 73.3: Talk
Thursday, April 2, 2020, 17:00–17:15, H-HS X
Search for ultra-high energy neutrinos from binary black hole mergers* — •Michael Schimp — Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal
The SD of the Pierre Auger Observatory is able to distinguish extensive air showers (EAS) induced by ultra-high energy neutrinos (UHE neutrinos; Eν> 0.1 EeV) from those induced by atomic nuclei, provided that they are highly inclined (60∘< θ < 95∘ with zenith angle θ). While its sensitivity to a diffuse UHE neutrino flux is comparable to IceCube’s, the dependences on arrival direction and flavor are very different. For instance, the Pierre Auger Observatory is the only operational instrument sensitive to UHE neutrinos from the Northern Hemisphere. Close to the horizon, the effective area is much enhanced, leading to unrivaled UHE neutrino sensitivities for searches following up transient sources in this part of the sky.
Binary black hole (BBH) mergers are among the most recently discovered classes of astrophysical objects but have not yet been successfully observed by any other means than gravitational waves. Using the sky localization probability distributions of the BBH mergers known so far, their most probable distances, and the assumption of a universal time-dependent luminosity per source, a combined search for UHE neutrinos emitted by the BBH mergers is performed. We present constraints on the time-dependent luminosity for the exemplary hypothesis of an emission lasting for 24 hours after each merger.
*Gefördert durch die BMBF Verbundforschung Astroteilchenphysik (Vorhaben 05A17PX1)