High Energy Neutrinos from Choked Gamma-Ray Bursts in AGN Accretion Disks

Abstract

Both long-duration gamma-ray bursts (LGRBs) from core collapse of massive stars and shortduration GRBs (SGRBs) from mergers of binary neutron star (BNS) or neutron star-black hole (NSBH) are expected to occur in the accretion disk of active galactic nuclei (AGNs). We show that GRB jets embedded in the migration traps of AGN disks are promised to be choked by the dense disk material. Efficient shock acceleration of cosmic rays at the reverse shock is expected, and high-energy neutrinos would be produced. We find that these sources can effectively produce detectable TeV-PeV neutrinos through pγ interactions. From a choked LGRB jet with isotropic equivalent energy of 10 53 erg at 100 Mpc, one expects ∼ 2 (7) neutrino events detectable by IceCube (IceCube-Gen2). The contribution from choked LGRBs to the observed diffuse neutrino background depends on the unknown local event rate density of these GRBs in AGN disks. For example, if the local event rate density of choked LGRBs in AGN disk is ∼ 5% that of low-luminosity GRBs (∼ 10 Gpc −3 yr −1 ), the neutrinos from these events would contribute to ∼ 10% of the observed diffuse neutrino background. Choked SGRBs in AGN disks are potential sources for future joint electromagnetic, neutrino, and gravitational wave multi-messenger observations.

Supernova explosions in active galactic nuclear discs

“…Here we focus on the observational signatures of SN explosions in AGN discs. The highly relativistic electromagnetic signatures of 𝛾-ray bursts (GRBs) and the accretion induced collapse of neutron stars (NS) into BHs have been recently explored (Zhu et al 2020(Zhu et al , 2021aPerna et al 2021b,a). Recently, Zhu et al (2021b) suggested that type Ia supernovae may potentially be observable in AGN discs.…”