A Note on Hydrodynamic Viscosity and Selfgravitation in Accretion Disks
| dc.creator | Duschl, Wolfgang J. | |
| dc.creator | Strittmatter, Peter A. | |
| dc.creator | Biermann, Peter L. | |
| dc.date | 2000-04-06 | |
| dc.date.accessioned | 2026-07-07T01:53:03Z | |
| dc.date.available | 2026-07-07T01:53:03Z | |
| dc.description | We propose a generalized accretion disk viscosity prescription based on hydrodynamically driven turbulence at the critical effective Reynolds number. This approach is consistent with recent re-analysis by Richard & Zahn (1999) of experimental results on turbulent Couette-Taylor flows. This new $β$-viscosity formulation is applied to both selfgravitating and non-selfgravitating disks and is shown to yield the standard $α$-disk prescription in the case of shock dissipation limited, non-selfgravitating disks. A specific case of fully selfgravitating $β$-disks is analyzed. We suggest that such 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. The $β$-mechanism may also account for the rapid mass transport required to power ultra luminous infrared galaxies. | |
| dc.description | 10 pages, no figures, accepted by Astronomy & Astrophysics | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0004076 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0004076 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/828 | |
| dc.subject | Astrophysics | |
| dc.title | A Note on Hydrodynamic Viscosity and Selfgravitation in Accretion Disks | |
| dc.type | text |