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

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 th...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2016-05, Vol.458 (2), p.1921-1926
Main Authors: Song, Cui-Ying, Liu, Tong, Gu, Wei-Min, Tian, Jian-Xiang
Format: Article
Language:English
Subjects:
Accretion disks
Astronomy
Black holes
Black holes (astronomy)
Computing time
Conversion
Energy
Fireballs
Gamma ray bursts
Gamma rays
Mathematical models
Neutrinos
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Summary: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 5 M⊙ 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.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stw427