Abstract
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.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1123-1132 |
| Number of pages | 10 |
| Journal | Astronomy and Astrophysics |
| Volume | 357 |
| Issue number | 3 |
| State | Published - 2000 |
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Keywords
- Accretion, accretion disks
- Galaxies: evolution
- Galaxy: evolution
- Hydrodynamics
- Stars: pre-main sequence
- Turbulence
ASJC Scopus subject areas
- Space and Planetary Science
- Astronomy and Astrophysics
Cite this
A note on hydrodynamic viscosity and selfgravitation in accretion disks. / Duschl, W. J.; Strittmatter, Peter A; Biermann, P. L.
In: Astronomy and Astrophysics, Vol. 357, No. 3, 2000, p. 1123-1132.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - A note on hydrodynamic viscosity and selfgravitation in accretion disks
AU - Duschl, W. J.
AU - Strittmatter, Peter A
AU - Biermann, P. L.
PY - 2000
Y1 - 2000
N2 - 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.
AB - 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.
KW - Accretion, accretion disks
KW - Galaxies: evolution
KW - Galaxy: evolution
KW - Hydrodynamics
KW - Stars: pre-main sequence
KW - Turbulence
UR - http://www.scopus.com/inward/record.url?scp=0008544240&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0008544240&partnerID=8YFLogxK
M3 - Article
AN - SCOPUS:0008544240
VL - 357
SP - 1123
EP - 1132
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
SN - 0004-6361
IS - 3
ER -