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

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 gammaray 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 ofLGRBs except for some extremely high energy sources.

Evidence for Magnetar Formation in Broad-lined Type Ic Supernovae1998bw and 2002ap

“…black holes (Popham et al 1999;Narayan et al 2001;Kohri & Mineshige 2002;Liu et al 2007Liu et al , 2016bSong et al 2016) and/or magnetars (Usov 1992;Dai & Lu 1998a,b;Zhang & Dai 2008, 2010Mösta et al 2015). GRBs are usually collimated relativistic phenomena, while SNe Ic-BL are mostly subrelativistic and nearly isotropic.…”

Numerical and Analytical Solutions of Neutrino-Dominated Accretion Flows With a Non-Zero Torque Boundary Condition and Its Applications in Gamma-Ray Bursts

“…We then apply nztNDAF model to GRBs. For some bright short GRBs and powerful long GRBs, NDAF model is challenged when interpreting the limited mass of the accretion disk after the compact binaries coalescence or massive collapsar Song et al 2016). For the same reason, NDAF is not expected to explain ULGRBs.…”

“…For accreting BH central engine, the limited total material mass that can be supplied during such two types of events sets a concrete constraint to the accretion model. The related work from this perspective has been carried out by previous authors Song et al 2016). Since the relative low output power and corresponding unreasonable high requirements of the total amount of accreting mass, the NDAF model is challenged to interpret certain bright SGRBs and powerful LGRBs.…”

“…-LGRBs: Using the similar method of for SGRBs, Song et al (2016) investigated the mass distribution of the NDAF disk for 48 LGRBs, 5M ⊙ is thought to be an fiducial amount of the remanent material of massive collapsars. Their work showed that NDAF may not be suitable for some extremely high energy LGRBs because they require a unusually large disk mass > 5M ⊙ .…”

“…Recently, detailed studies by show that some bright short GRBs (SGRBs) are hard to be explained with NDAF. More recently, Song et al (2016) argued that NDAF may not be the central engine for some extremely high energy long GRBs (LGRBs).…”