Bellan, P. M. (2008) Enrichment of the dust-to-gas mass ratio in Bondi/Jeans accretion/cloud systems due to unequal changes in dust and gas incoming velocities. Astrophysical Journal, 678 (2). pp. 1099-1108. ISSN 0004-637X. doi:10.1086/533483. https://resolver.caltech.edu/CaltechAUTHORS:BELapj08
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Abstract
The ratio of the Bondi and Jeans lengths is used to develop a cloud-accretion model that describes both an inner Bondi-type regime where gas pressure is balanced by the gravity of a central star and an outer Jeans-type regime where gas pressure is balanced by gas self-gravity. The gas density profile provided by this model makes a smooth transition from a wind-type inner solution to a Bonnor-Ebert-type outer solution. It is shown that high-velocity dust impinging on this cloud will tend to pile up due to having a different velocity profile from gas so that the dust-to-gas ratio is substantially enriched above the 1% interstellar medium (ISM) level.
| Item Type: | Article | |||||||||
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| Additional Information: | © 2008. The American Astronomical Society. Received 2006 April 13; accepted 2008 January 23. The author wishes to thank an anonymous referee for thoughtful comments. | |||||||||
| Subject Keywords: | accretion disks; interstellar matter; jets and outflows; magnetohydrodynamics | |||||||||
| Issue or Number: | 2 | |||||||||
| DOI: | 10.1086/533483 | |||||||||
| Record Number: | CaltechAUTHORS:BELapj08 | |||||||||
| Persistent URL: | https://resolver.caltech.edu/CaltechAUTHORS:BELapj08 | |||||||||
| Usage Policy: | No commercial reproduction, distribution, display or performance rights in this work are provided. | |||||||||
| ID Code: | 11466 | |||||||||
| Collection: | CaltechAUTHORS | |||||||||
| Deposited By: | Marie Noren | |||||||||
| Deposited On: | 28 Aug 2008 03:24 | |||||||||
| Last Modified: | 08 Nov 2021 21:59 |
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