Hydrodynamic Viscosity and Self-gravitation in Accretion Disks

Details Hydrodynamic Viscosity and Self-gravitation in Accretion Disks Hydrodynamic Viscosity and Self-gravitation in Accretion Disks

May 1998

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1998aas...192.6617d&link_type=abstract

American Astronomical Society, 192nd AAS Meeting, #66.17; Bulletin of the American Astronomical Society, Vol. 30, p.917

Astronomy and Astrophysics

Astronomy

6

Scientific paper

We propose a generalization of the viscosity prescription in geometrically thin accretion disks which is applicable for selfgravitating as well as non-selfgravitating disks. The prescription is based turbulent flows at the critical effective Reynolds number. It allows for consistent models of thin selfgravitating disks, and recovers the alpha disk solution as the limiting case of negligible selfgravity, i.e., practically massless disks. We suggest that such selfgravitating disks may explain the observed spectra of protoplanetary disks and yield a natural explanation for the radial motions inferred from the observed metallicity gradients in disk galaxies.

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