Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012arep...56....1b&link_type=abstract
Astronomy Reports, Volume 56, Issue 1, pp.1-8
Astronomy and Astrophysics
Astronomy
Scientific paper
We have studied the two-dimensional structure of an accretion disk without angular momentum near a black hole using the Grad-Shafranov equation. When the two-dimensional structure of the flow is systematically taken into account, the singularity of the hydrodynamic equations is located at the sonic surface, rather than at a displaced surface, as occurs when the disk thickness is estimated using the standard technique. A transonic flow can also exist for negative energies, which is not possible when the accretion is strictly radial.
Beskin Vasilii S.
Pariev Vladimir I.
Zheltoukhov A. A.
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