Neutron conversion-diffusion: a new model for structured short gamma-ray burst jets compatible with GRB 170817

Abstract

We present a generic theoretical model for the structuring of a relativistic jet propagating through the ejecta of a binary neutron star merger event, introducing the effects of the neutron conversion-diffusion, which provides a baryon flux propagating transversely from the ejecta towards the jet axis. This results naturally in an increased baryon load structure of the outer jet with the approximate isotropic energy distribution $E_{iso}(\theta )\propto {\theta }^{-4}$, which is compatible with the first gravitational wave and short gamma-ray burst event GW170817/GRB 170817A observed at an off-axis angle of the jet.

arXiv comment17 pages, 10 figures, Accepted for publication in MNRAS

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Cited by in corpus (6)

• Cocoon breakout and escape from the ejecta of neutron star mergers
• Cocoon cooling emission in neutron star mergers
• High-energy neutrino emission from magnetised jets of rapidly rotating protomagnetars
• On the synthesis of heavy nuclei in protomagnetar outflows and implications for ultra-high energy cosmic rays
• A global test of jet structure and delay time distribution of short-duration gamma-ray bursts
• Off-axis MeV and very-high-energy gamma-ray emissions from structured gamma-ray burst jets