Behaviour of matter close to the event horizon

Abstract

Investigation of the behaviour of accreting matter close to the black hole event horizon is of fundamental importance in relativistic and high energy astrophysics because they provide the key features of the diagnostic spectra of the stellar mass and super-massive black holes. In this paper, we examine the terminal behaviour of general relativistic matter in multi-transonic, advective black hole accretion discs. We compute, for the first time we believe, the values of various dynamical and thermodynamic multi-transonic flow variables {\it extremely close} ($\le$ 0.01 $r_g$) to the event horizon and study the dependence of these variables on fundamental accretion parameters. Our calculation is useful for a better understanding of Hawking radiation from acoustic black holes.

Accepted for publication in MNRAS. 11 single column pages. Two black and white and one colour encapsulated postscript figures

Cited by in corpus (15)

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• Secular instability in quasi-viscous disc accretion
• Restrictions on the Physical Prescription for the Viscosity in Advection-Dominated Accretion Disks
• Quasi-viscous accretion flow -- I: Equilibrium conditions and asymptotic behaviour
• Nonlinear variations in axisymmetric accretion
• Dynamical analogue spacetimes in non-relativistic flows
• Dependence of acoustic surface gravity on disc thickness for accreting astrophysical black holes
• Emergent gravity through non-linear perturbation