Spinning up black holes with super-critical accretion flows

@article{43581,
   author = {Abramowicz, Marek},
   article_location = {FR - Francouzská republika},
   article_number = {A41},
   doi = {http://dx.doi.org/10.1051/0004-6361/201116702},
   keywords = {Accretion, accretion disks, Black hole physics},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {Spinning up black holes with super-critical accretion flows},
   volume = {532},
   year = {2011}
}

TY  - JOUR
ID  - 43581
AU  - Abramowicz, Marek
PY  - 2011
TI  - Spinning up black holes with super-critical accretion flows
JF  - Astronomy & Astrophysics
VL  - 532
IS  - A41
SP  - 1-11
EP  - 1-11
SN  - 00046361
KW  - Accretion, accretion disks, Black hole physics
N2  - We study the process of spinning up black holes by accretion from slim disks in a wide range of accretion rates. We show that for super-Eddington accretion rates and low values of the viscosity parameter alpha (lesssim 0.01) the limiting value of the dimensionless spin parameter a_* can reach values higher than a_*=0.9978 inferred by Thorne (1974) in his seminal study. For mdot=10mdot_{Edd} and alpha=0.01 spin equilibrium is reached at a_*=0.9994. We show that the equilibrium spin value depends strongly on the assumed value of alpha. We also prove that for high accretion rates the impact of captured radiation on spin evolution is negligible.
ER  - 

ABRAMOWICZ, Marek. Spinning up black holes with super-critical accretion flows. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2011, roč.~532, A41, s.~1-11. ISSN~0004-6361. Dostupné z: https://dx.doi.org/10.1051/0004-6361/201116702.