Can black-hole neutrino-cooled disks power short gamma-ray bursts?
arXiv:1504.02156 · doi:10.1088/0004-637X/806/1/58
Abstract
Stellar-mass black holes (BHs) surrounded by neutrino-dominated accretion flows (NDAFs) are the plausible candidates to power gamma-ray bursts (GRBs) via neutrinos emission and their annihilation. The progenitors of short-duration GRBs (SGRBs) are generally considered to be compact binaries mergers. According to the simulation results, the disk mass of the NDAF has been limited after merger events. We can estimate such disk mass by using the current SGRB observational data and fireball model. The results show that the disk mass of a certain SGRB mainly depends on its output energy, jet opening angle, and central BH characteristics. Even for the extreme BH parameters, some SGRBs require massive disks, which approach or exceed the limits in simulations. We suggest that there may exist alternative magnetohydrodynamic processes or some mechanisms increasing the neutrino emission to produce SGRBs with the reasonable BH parameters and disk mass.
17 pages, 1 table, 2 figures, accepted for publication in ApJ
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- Numerical and analytical solutions of Neutrino-Dominated Accretion Flows with a Non-Zero Torque Boundary Condition and its applications in Gamma-ray Bursts
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- Testing Blandford-Znajek mechanism in black hole hyperaccretion flows for long-duration gamma-ray bursts
- Black hole hyperaccretion in collapsars. II. Gravitational waves
- Anisotropic neutrinos and gravitational waves from black hole neutrino-dominated accretion flows in fallback core-collapse supernovae
- Black hole hyperaccretion in collapsars. III. GRB timescale
- Revealing physical activity of GRB central engine with macronova/kilonova data
- Revisiting black hole hyperaccretion in the center of gamma-ray bursts for the lower mass gap