Testing black hole neutrino-dominated accretion discs for long-duration gamma-ray bursts

Document Type

Article

Publication Date

1-1-2016

Publication Title

Monthly Notices of the Royal Astronomical Society

Volume

458

Issue

2

First page number:

1921

Last page number:

1926

Abstract

Long-duration gamma-ray bursts (LGRBs) are generally considered to originate from the massive collapsars. It is believed that the central engine of gamma-ray bursts (GRBs) is a neutrino-dominated accretion flow (NDAF) around a rotating stellar-mass black hole (BH). The neutrino annihilation above the NDAF is a feasible mechanism to power GRB. In this work, we analyse the distributions of the isotropic gamma-ray-radiated energy and jet kinetic energy of 48 LGRBs. According to the NDAF and fireball models, we estimate the mean accreted masses of LGRBs in our sample to investigate whether the NDAFs can power LGRBs with the reasonable BH parameters and conversion efficiency of neutrino annihilation. The results indicate that most of the values of the accreted masses are less than 5M⊙ for the extreme Kerr BHs and high conversion efficiency. It suggests that the NDAFs may be suitable for most of LGRBs except for some extremely high energy sources. © 2016 The Authors.

Keywords

Accretion; accretion discs; Black hole physics; Gamma-ray burst: General; Neutrinos

Language

English

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