Small-scale inviscid accretion discs around black holes

Details Small-scale inviscid accretion discs around black holes Small-scale inviscid accretion discs around black holes

2000-06-25

arxiv.org/abs/astro-ph/0006351v2

Mon.Not.Roy.Astron.Soc. 323 (2001) 167

Astronomy and Astrophysics

Astrophysics

10 pages, accepted to MNRAS

Scientific paper

10.1046/j.1365-8711.2001.04133.x

Gas falling quasi-spherically onto a black hole forms an inner accretion disc if its specific angular momentum $l$ exceeds $\lmin\sim r_gc$ where $r_g$ is the Schwarzschild radius. The standard disc model assumes $l\gg\lmin$. We argue that, in many black-hole sources, accretion flows have angular momenta just above the threshold for disc formation, $l\simgt\lmin$, and assess the accretion mechanism in this regime. In a range $\lmin

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