A Toy Model for Gamma‐Ray Bursts in Type Ib/c Supernovae

Lei, Wei‐Hua; Wang, Ding-Xiong; Ma, Rong

doi:10.1086/426378

Cited by 31 publications

(32 citation statements)

References 34 publications

(31 reference statements)

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“…It is shown that this system has a precession period of about a second. The Lense-Thirring precession appears for a Kerr BH, if the accretion disk is inclined with respect to the equatorial plane of the BH (Lense & Thirring 1918). Recently, Reynoso et al (2006, hereafter RRS06) studied the possible effect of Lense-Thirring precession on neutrinocooled accretion disks.…”

Section: Precessing Jetmentioning

confidence: 99%

A model of the light curves of gamma-ray bursts

Lei¹,

Wang²,

Gong³

et al. 2007

A&A

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Aims. An extreme Kerr black hole (BH) surrounded by a precessing disk is invoked to explain the light curves of gamma-ray bursts (GRBs) based on the coexistence of the Blandford-Znajek (BZ) and the magnetic coupling (MC) processes. Methods. The overall shape of the light curves and the duration of GRBs are interpreted by the evolution of the half-opening angle of the magnetic flux on the BH horizon, and the complex temporal structures are modulated by the precession and nutation of the jet powered by the BZ process. Results. The time profile of the emission exhibits a fast rise and a slow decay due to the effect of the evolution of the half-opening angle. The light curves of several GRBs are well fitted by this model with only six free parameters.

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Section: Precessing Jetmentioning

confidence: 99%

A model of the light curves of gamma-ray bursts

Lei¹,

Wang²,

Gong³

et al. 2007

A&A

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“…With the consideration to the spin-up process due to accretion and the spin-down process due to the BZ process, the BH spin parameter always evolves to an equilibrium value (Lei et al 2005) so that the a • -dependence essentially does not enter the problem. As shown in Figure 2, the m-dependence will add to the scatter in the correlations.…”

mentioning

confidence: 99%

What Can We Learn about GRB from the Variability Timescale Related Correlations?

Xie

Lei

Wang

2017

ApJ

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Recently, two empirical correlations related to the minimum variability timescale (MTS) of the light curves are discovered in gamma-ray bursts (GRBs). One is the anti-correlation between MTS and Lorentz factor Γ, and the other is the anti-correlation between the MTS and gamma-ray luminosity L γ . Both of the two correlations might be used to explore the activity of the central engine of GRBs. In this paper, we try to understand these empirical correlations by combining two popular black hole central engine models (namely, the Blandford & Znajek mechanism (BZ) and the neutrino-dominated accretion flow (NDAF)). By taking the MTS as the timescale of viscous instability of the NDAF, we find that these correlations favor the scenario in which the jet is driven by the BZ mechanism.

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“…The BZ luminosity can be estimated as (e.g., Lei et al 2005;Krolik & Piran 2011;Kawanaka et al 2013b;Liu et al 2015b)…”

Section: Magnetized Bh-ndafsmentioning

confidence: 99%

Neutrino-dominated accretion flows as the central engine of gamma-ray bursts

Liu

Zhang

2017

New Astronomy Reviews

112

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Neutrino-dominated accretion flows (NDAFs) around rotating stellar-mass black holes (BHs) are plausible candidates for the central engines of gamma-ray bursts (GRBs). NDAFs are hyperaccretion disks with accretion rates in the range of around 0.001-10 M ⊙ s −1 , which have high density and temperature and therefore are extremely optically thick and geometrically slim or even thick. We review the theoretical progresses in studying the properties of NDAFs as well as their applications to the GRB phenomenology. The topics include: the steady radial and vertical structure of NDAFs and the implications for calculating neutrino luminosity and annihilation luminosity, jet power due to neutrino-antineutrino annihilation and Blandford-Znajek mechanism and their dependences on parameters such as BH mass, spin, and accretion rate, time evolution of NDAFs, effect of magnetic fields, applications of NDAF theories to the GRB phenomenology such as lightcurve variability, extended emission, X-ray flares, kilonovae, etc., as well as probing NDAFs using multi-messenger signals such as MeV neutrinos and gravitational waves.

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A Toy Model for Gamma‐Ray Bursts in Type Ib/c Supernovae

Cited by 31 publications

References 34 publications

A model of the light curves of gamma-ray bursts

A model of the light curves of gamma-ray bursts

What Can We Learn about GRB from the Variability Timescale Related Correlations?

Neutrino-dominated accretion flows as the central engine of gamma-ray bursts

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