Follow-up Search for UHE Photons from Gravitational Wave Sources with the Pierre Auger ObservatoryP. Ruehl
, Andrej Filipčič
, Jon Paul Lundquist
, Samo Stanič
, Serguei Vorobiov
, Danilo Zavrtanik
, Marko Zavrtanik
, Lukas Zehrer
, 2022, published scientific conference contribution
Abstract: Multimessenger astronomy has become increasingly important during the past decade. Some astronomical objects have already been successfully observed in the light of multiple messenger signals, allowing for a much deeper understanding of their physical properties. The Pierre Auger Observatory has taken part in multimessenger astronomy with an exhaustive exploration of the ultra-high-energy sky. In this contribution, for the first time, a search for UHE photons from the sources of gravitational waves is presented. Interactions with the cosmic background radiation fields are expected to attenuate any possible flux of ultra-high-energy photons from distant sources and a non-negligible background of air shower events with hadronic origin makes an unambiguous identification of primary photons a challenging task. In the analysis presented here, a selection strategy is applied to both GW sources and air shower events aiming to provide maximum sensitivity to a possible photon signal. At the same time, a window is kept open for hypothetical new-physics processes, which might allow for much larger interaction lengths of photons in the extragalactic medium. Preliminary results on the UHE photon fluence from a selection of GW sources, including the binary neutron star merger GW170817 are presented.
Keywords: Pierre Auger Observatory, indirect detection, fluorescence detection, ultra-high energy, photons, cosmic rays, anisotropy, gravitational waves, multimessenger
Published in RUNG: 29.09.2023; Views: 472; Downloads: 6
Full text (940,08 KB)
This document has many files! More...