Dortmund 2021 – scientific programme
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T: Fachverband Teilchenphysik
T 92: Neutrino astronomy IV
T 92.9: Talk
Thursday, March 18, 2021, 18:00–18:15, Tq
Search for ultra-high energy neutrinos from binary black hole mergers* — •Michael Schimp for the Pierre Auger collaboration — Bergische Universität Wuppertal, Gaußstr. 20, 42119 Wuppertal
The Surface Detector of the Pierre Auger Observatory is able to distinguish extensive air showers induced by ultra-high energy neutrinos (UHE neutrinos; Eν> 0.1 EeV) from those induced by atomic nuclei, provided that they are highly inclined (zenith angles from 60∘ to 95∘). While its sensitivity to a diffuse UHE neutrino flux is comparable to IceCube’s, the dependences on the 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 instantaneous 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 3D sky localization probability distributions of the BBH mergers published so far, and the assumption of a universal time-dependent luminosity, 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 beginning at the time of the merger.
*Supported by BMBF Verbundforschung Astroteilchenphysik (Projects 05A17PX1 and 05A20PX1)