Advection-Dominated Accretion Disks: Geometrically Slim or Thick?

Details Advection-Dominated Accretion Disks: Geometrically Slim or Thick? Advection-Dominated Accretion Disks: Geometrically Slim or Thick?

2009-09-26

arxiv.org/abs/0909.4838v1

Astronomy and Astrophysics

Astrophysics

High Energy Astrophysical Phenomena

12 pages, 3 figures, accepted by PASJ

Scientific paper

We revisit the vertical structure of black hole accretion disks in spherical
coordinates. By comparing the advective cooling with the viscous heating, we
show that advection-dominated disks are geometrically thick, i.e., with the
half-opening angle > 2\pi/5, rather than slim as supposed previously in the
literature.

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