Revisiting vertical structure of neutrino-dominated accretion disks: Bernoulli parameter, neutrino trapping and other distributions

Abstract

We revisit the vertical structure of neutrino dominated accretion flows (NDAFs) in spherical coordinates with a new boundary condition based on the mechanical equilibrium. The solutions show that NDAF is significantly thick. The Bernoulli parameter and neutrino trapping are determined by the mass accretion rate and the viscosity parameter. According to the distribution of the Bernoulli parameter, the possible outflow may appear in the outer region of the disk. The neutrino trapping can essentially affect the neutrino radiation luminosity. The vertical structure of NDAF is like a "sandwich", and the multilayer accretion may account for the flares in gamma-ray bursts.

7 pages, 2 figures, Accepted for publication in Astrophysics & Space Science

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• Testing black hole neutrino-dominated accretion discs for long-duration gamma-ray bursts
• Self-gravity in neutrino-dominated accretion disks
• Outflows from black hole hyperaccretion systems: short and long-short gamma-ray bursts and "quasi-supernovae"
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• Evolutions of stellar-mass black hole hyperaccretion systems in the center of gamma-ray bursts
• 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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• Anisotropic multimessenger signals from black hole neutrino-dominated accretion flows with outflows in binary compact object mergers
• A method to constrain mass and spin of GRB black hole within the NDAF model
• Revisiting the hot matter in the center of gamma-ray bursts and supernova
• The propagation of neutrino-driven jets in Wolf-Rayet stars
• Nucleosynthesis Contribution of Neutrino-dominated Accretion Flows to the Chemical Evolution of Active Galactic Nuclei
• The influence of outflows on the 1/f-like luminosity fluctuations
• Relativistic global solutions of neutrino-dominated accretion flows with magnetic coupling