Variabilities of gamma-ray bursts from black hole hyper-accretion discs

The emission from black hole binaries (BHBs) and active galactic nuclei (AGNs) display significant aperiodic variabilities. The most promising explanation for these variabilities is the propagating fluctuations in the accretion flow. It is natural to expect that the mechanism driving variabilities i...

Full description

Saved in:
Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2016-11, Vol.463 (1), p.245-250
Main Authors: Lin, Da-Bin, Lu, Zu-Jia, Mu, Hui-Jun, Liu, Tong, Hou, Shu-Jin, Lü, Jing, Gu, Wei-Min, Liang, En-Wei
Format: Article
Language:English
Subjects:
Accretion disks
Active galactic nuclei
Astrophysics
Binary stars
Black holes
Black holes (astronomy)
Double stars
Emission
Fluctuation
Gamma ray astronomy
Gamma ray bursts
Nuclear power generation
Star & galaxy formation
X-ray astronomy
Citations: Items that this one cites
Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The emission from black hole binaries (BHBs) and active galactic nuclei (AGNs) display significant aperiodic variabilities. The most promising explanation for these variabilities is the propagating fluctuations in the accretion flow. It is natural to expect that the mechanism driving variabilities in BHBs and AGNs may operate in a black hole hyper-accretion disc, which is believed to power gamma-ray bursts (GRBs). We study the variabilities of jet power in GRBs based on the model of propagating fluctuations. It is found that the variabilities of jet power and the temporal profile of erratic spikes in this scenario are similar to those in observed light curves of prompt gamma-ray emission of GRBs. Our results show that the mechanism driving X-ray variabilities in BHBs and AGNs may operate in the central engine to drive the variabilities of GRBs.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stw1985