2009/06/10 by Ivan Zalamea, I. Zalamea, Andrei M. Beloborodov +1
Physics and Astronomy · #Accretion (finance) #Accretion disc #Astrophysical Phenomena and Observations #Binary black hole #Black hole (networking) #Pulsars and Gravitational Waves Research #Radiative transfer #Relativity and Gravitational Theory #Rotating black hole #Spin-flip #Spinning #Stellar black hole #astro-ph.HE
paper · pdf · doi:10.1111/j.1365-2966.2009.15233.x
8 pages, 9 figures, accepted to MNRAS
arxiv created 2009/06/10 · openalex publication_date 2009/08/25 · arxiv updated 2015/05/13 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Accretion on to black holes in wind-fed binaries and in collapsars forms small rotating discs with peculiar properties. Such ‘mini-discs’ accrete on the free-fall time without the help of viscosity and nevertheless can have a high radiative efficiency. The inviscid mini-disc model was previously constructed for a non-rotating black hole. We extend the model to the case of a spinning black hole, calculate the structure and radiative efficiency of the disc and find their dependence on the black hole spin. If the angular momenta of the disc and the black hole are anti-aligned, a hydrodynamic analogue of Penrose process takes place.