Black hole spin dependence of general relativistic multi-transonic accretion close to the horizon

被引：12

作者：

Das, Tapas K. ^{[1
,2
]}

Nag, Sankhasubhra ^{[3
]}

Hegde, Swathi ^{[4
]}

Bhattacharya, Sourav ^{[1
]}

Maity, Ishita ^{[5
]}

Czerny, Bozena ^{[6
]}

Barai, Paramita ^{[7
]}

Wiita, Paul J. ^{[8
]}

Karas, Vladimir ^{[9
]}

Naskar, Tapan ^{[10
]}

机构：

[1] Harish Chandra Res Inst, Allahabad 211019, Uttar Pradesh, India

[2] SN Bose Natl Ctr Basic Sci, Kolkata 700098, India

[3] Sarojini Naidu Coll Women, Kolkata 700028, India

[4] Univ Mysore, Dept Phys, Mysore 6, Karnataka, India

[5] Ferguson Coll, Pune 411004, Maharashtra, India

[6] Nicolaus Copernicus Astron Ctr, PL-00716 Warsaw, Poland

[7] INAF Osservatorio Astron Trieste, I-34143 Trieste, Italy

[8] Coll New Jersey, Dept Phys, Ewing, NJ 08628 USA

[9] Acad Sci Czech Republ, Astron Inst, CZ-14131 Prague 4, Sporilov, Czech Republic

[10] Indian Assoc Cultivat Sci, Dept Theoret Phys, Kolkata 700032, India

来源：

NEW ASTRONOMY | 2015年 / 37卷

基金：

欧洲研究理事会;

关键词：

Accretion; Accretion discs; Black hole physics; Gravitation; ADVECTION-DOMINATED ACCRETION; QUASI-PERIODIC OSCILLATIONS; RANKINE-HUGONIOT SHOCKS; DISK-ACCRETION; VISCOUS ACCRETION; GLOBAL-SOLUTIONS; STANDING SHOCKS; STELLAR-MASS; FLOWS; CONSTRAINTS;

D O I：

10.1016/j.newast.2014.11.007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We introduce a novel formalism to investigate the role of the spin angular momentum of astrophysical black holes in influencing the behavior of low angular momentum general relativistic accretion. We propose a metric independent analysis of axisymmetric general relativistic flow, and consequently formulate the space and time dependent equations describing the general relativistic hydrodynamic accretion flow in the Kerr metric. The associated stationary critical solutions for such flow equations are provided and the stability of the stationary transonic configuration is examined using an elegant linear perturbation technique. We examine the properties of infalling material for both prograde and retrograde accretion as a function of the Kerr parameter at extremely close proximity to the event horizon. Our formalism can be used to identify a new spectral signature of black hole spin, and has the potential of performing the black hole shadow imaging corresponding to the low angular momentum accretion flow. (C) 2015 Published by Elsevier B.V.

引用

页码：81 / 104

页数：24

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