A wide star–black-hole binary system from radial-velocity measurements
- Jifeng Liu, Haotong Zhang, X. Cui
- PhysicsNature
- 1 November 2019
Radial-velocity measurements of a Galactic B-type star show a dark companion that seems to be a black hole of about 68 solar masses, in a widely spaced binary system.
Structure and Luminosity of Neutrino-cooled Accretion Disks
Neutrino-cooled hyperaccretion disks around stellar-mass black holes are plausible candidates for the central engines of gamma-ray bursts. We calculate the one-dimensional structure and the…
Neutrino-dominated Accretion Models for Gamma-Ray Bursts: Effects of General Relativity and Neutrino Opacity
We first refine the fixed concept in the literature that the usage of the Newtonian potential in studies of black hole accretion is invalid and the general relativistic effect must be considered. As…
Neutrino-dominated accretion flows as the central engine of gamma-ray bursts
- Tong Liu, Weimin Gu, Bing Zhang
- Physics
- 16 May 2017
Global dynamics of radiatively inefficient accretion flows: advection versus convection
We obtain global solutions for radiatively inefficiently accretion flows around black holes. Whether and where convection develops in a flow are self-consistently determined by mixinglength theory.…
JET LUMINOSITY OF GAMMA-RAY BURSTS: THE BLANDFORD–ZNAJEK MECHANISM VERSUS THE NEUTRINO ANNIHILATION PROCESS
A neutrino-dominated accretion flow (NDAF) around a rotating stellar-mass black hole (BH) is one of the plausible candidates for the central engine of gamma-ray bursts (GRBs). Two mechanisms, i.e.,…
Jet precession driven by neutrino-cooled disk for gamma-ray bursts
Aims. A model of jet precession driven by a neutrino-cooled disk around a spinning black hole is presented to explain the temporal structure and spectral evolution of gamma-ray bursts (GRBs).…
Advection-Dominated Accretion Disks: Geometrically Slim or Thick?
We revisit the vertical structure of black-hole accretion disks in spherical coordinates. By comparing the advective cooling with the viscous heating, we show that advection-dominated disks are…
Spectral Analyses of the Nearest Persistent Ultraluminous X-Ray Source M 33 X-8
- S. Weng, Junxian Wang, Weimin Gu, Ju-fu Lu
- Education
- 31 August 2009
National Basic Research Program of China [2009CB824800]; National Natural Science Foundation of China [10778711, 10833002]; Program for New Century Excellent Talents in University [06-0559]
Black Hole Hyperaccretion Inflow–Outflow Model. I. Long and Ultra-long Gamma-Ray Bursts
- Tong Liu, Cui-Ying Song, Bing Zhang, Weimin Gu, A. Heger
- Physics
- 30 September 2017
Long-duration gamma-ray bursts (LGRBs) and ultra-LGRBs (ULGRBs) originate from collapsars, in the center of which a newborn rotating stellar-mass black hole (BH) surrounded by a massive accretion…
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