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Enrichment of the dust-to-gas mass ratio in Bondi/Jeans accretion/cloud systems due to unequal changes in dust and gas incoming velocities

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. 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
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1086/533483DOIArticle
https://arxiv.org/abs/0801.4106arXivDiscussion Paper
ORCID:
AuthorORCID
Bellan, P. M.0000-0002-0886-8782
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
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:03 Oct 2019 00:19

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