Viscosity in Selfgravitating Accretion Disks
| dc.creator | Duschl, W. J. | |
| dc.creator | Strittmatter, Peter A. | |
| dc.creator | Biermann, Peter L. | |
| dc.date | 1997-02-14 | |
| dc.date.accessioned | 2026-07-25T12:55:35Z | |
| dc.description | We show that the standard model for geometrically thin accretion disks (alpha-disks) leads to inconsistencies if selfgravity plays a role. This problem arises from the parametrization of viscosity in terms of local sound velocity and vertical disk scale height. A viscosity prescription based on turbulent flows at the critical effective Reynolds number allows for consistent models of thin selfgravitating disks, and recovers the alpha-disk solution as the limiting case of negligible selfgravity. 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. | |
| dc.description | 10 pages, LaTeX, AAS 2 column preprint style (aas2pp4.sty), submitted to ApJ | |
| dc.identifier | https://arxiv.org/abs/astro-ph/9702132 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/9702132 | |
| dc.identifier.uri | https://dspace.dare.co.zw/handle/123456789/12962 | |
| dc.subject | Astrophysics | |
| dc.title | Viscosity in Selfgravitating Accretion Disks | |
| dc.type | text |