Spinning up black holes with super-critical accretion flows - INSU - Institut national des sciences de l'Univers Access content directly
Journal Articles Astronomy and Astrophysics - A&A Year : 2011

Spinning up black holes with super-critical accretion flows

A. Sądowski
  • Function : Author
M. Bursa
  • Function : Author
M. Abramowicz
  • Function : Author
W. Kluźniak
  • Function : Author
R. Moderski
  • Function : Author
M. Safarzadeh
  • Function : Author

Abstract

We study the process of spinning up black holes by accretion from slim disks for a wide range of accretion rates. We show that for super-Eddington accretion rates and low values of the viscosity parameter α ( ≲ 0.01) the limiting value of the dimensionless spin parameter a can reach values higher than a = 0.9978 inferred by Thorne in his seminal study. For Ṁ = 10 ṀEdd and α = 0.01, spin equilibrium is reached at a = 0.9994. We show that the equilibrium spin value depends strongly on the assumed value of α. We also prove that for high accretion rates the impact of captured radiation on spin evolution is negligible.
Fichier principal
Vignette du fichier
aa16702-11.pdf (460.27 Ko) Télécharger le fichier
Origin : Publisher files allowed on an open archive

Dates and versions

insu-03645942 , version 1 (22-04-2022)

Identifiers

Cite

A. Sądowski, M. Bursa, M. Abramowicz, W. Kluźniak, J. -P. Lasota, et al.. Spinning up black holes with super-critical accretion flows. Astronomy and Astrophysics - A&A, 2011, 532, ⟨10.1051/0004-6361/201116702⟩. ⟨insu-03645942⟩
15 View
11 Download

Altmetric

Share

Gmail Facebook X LinkedIn More