Multi-GeV Neutrino Emission from Magnetized Gamma Ray Bursts

TL;DR

This paper predicts multi-GeV neutrino emissions from magnetized gamma-ray bursts, showing that detectable neutrino signals are possible for nearby, luminous bursts, with implications for current and future neutrino observatories.

Contribution

It provides the first detailed estimates of neutrino fluxes from magnetically dominated GRB models and assesses their detectability with IceCube and future detectors.

Findings

Significant multi-GeV neutrino fluxes are expected for typical GRB parameters.

Detection of at least one muon event requires nearby, luminous bursts at low redshift.

Future neutrino detectors could observe more events from GRBs with larger effective volumes.

Abstract

We investigate the expected neutrino emissivity from nuclear collisions in magnetically dominated collisional models of gamma-ray bursts, motivated by recent observational and theoretical developments. The results indicate that significant multi-GeV neutrino fluxes are expected for model parameter values which are typical of electromagnetically detected bursts. We show that for detecting at least one muon event in Icecube and its Deep Core sub-array, a single burst must be near the high end of the luminosity function and at a redshift $z\lesssim 0.2$. We also calculate the luminosity and distance ranges that can generate $0.01-1$ muon events per GRB in the same detectors, which may be of interest if simultaneously detected electromagnetically, or if measured with future extensions of Icecube or other neutrino detectors with larger effective volume and better sensitivity.