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arXiv · 1712.00449

Expected neutrino fluence from short Gamma-Ray Burst 170817A and off-axis angle constraints

Daniel Biehl·Jonas Heinze·Walter Winter
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Abstract

We compute the expected neutrino fluence from SGRB 170817A, associated with the gravitational wave event GW 170817, directly based on Fermi observations in two scenarios: structured jet and off-axis (observed) top-hat jet. While the expected neutrino fluence for the structured jet case is very small, large off-axis angles imply high radiation densities in the jet, which can enhance the neutrino production efficiency. In the most optimistic allowed scenario, the neutrino fluence can reach only $10^{-4}$ of the sensitivity of the neutrino telescopes. We furthermore demonstrate that the fact that gamma-rays can escape limits the baryonic loading (energy in protons versus photons) and the off-axis angle for the internal shock scenario. In particular, for a baryonic loading of ten, the off-axis angle is more strongly constrained by the baryonic loading than by the time delay between the gravitational wave event and the onset of the gamma-ray emission.

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Daniel Biehl, Jonas Heinze, Walter Winter. 2017-12-01. Expected neutrino fluence from short Gamma-Ray Burst 170817A and off-axis angle constraints. https://doi.org/10.1093/mnras%2Fsty285

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