Published May 1, 2006
| public
Journal Article
Open
Spherical accretion
- Creators
-
Sari, Re'em
- Goldreich, Peter
Chicago
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Abstract
We compare different examples of spherical accretion onto a gravitating mass. Limiting cases include the accretion of a collisionally dominated fluid and the accretion of collisionless particles. We derive expressions for the accretion rate and density profile for semicollisional accretion, which bridges the gap between these limiting cases. Particle crossing of the Hill sphere during the formation of the outer planets is likely to have taken place in the semicollisional regime.
Additional Information
© 2006 The American Astronomical Society. Received 2006 January 31; accepted 2006 March 13; published 2006 April 10. We thank S. Shapiro for a helpful discussion. R.S. is an Alfred P. Sloan Fellow and a Packard Fellow. This research was supported in part by NASA grant NAG 5-12037.Files
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Additional details
- Eprint ID
- 7228
- Resolver ID
- CaltechAUTHORS:SARapj06
- Created
-
2007-01-23Created from EPrint's datestamp field
- Updated
-
2020-03-03Created from EPrint's last_modified field
- Caltech groups
- TAPIR, Division of Geological and Planetary Sciences (GPS)