A unified description of the global structure of accretion disks

Details A unified description of the global structure of accretion disks A unified description of the global structure of accretion disks

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996cha%26a..20..409c&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 20, Issue 4, p. 409-414.

Astronomy and Astrophysics

Astrophysics

Scientific paper

The global structure of accretion disks is investigated in a unified scheme. We use a general radiative cooling formula applicable to both optically thick and thin regimes and we include radial advection cooling. Within the α-viscosity models, we found distinct families of global solutions. If the accretion rate is low, there are three non-intersecting solutions, corresponding to optically thick and thin, local cooling and optically thin advection cooling. If the accretion rate is high, and the viscosity coefficient is large, the two local cooling solutions coincide at radii R1 and R2 and exist independently below R1 and aboveR2 while the advection solution is stable at all radii. If the accretion is high and the viscosity is low, the two optically thin solutions will cross each other while the optically thick solution exists at all radii.

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