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Accretion Onto the Milky Way: The Smith Cloud

Part of: IAU Issue 315 - From Interstellar Clouds...

Published online by Cambridge University Press:  12 September 2016

Felix J. Lockman
Felix J. Lockman*
Affiliation:
National Radio Astronomy Observatory, P.O. Box 2 Green Bank, WV 24944USA email: jlockman@nrao.edu
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Abstract

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Active gas accretion onto the Milky Way is observed in an object called the Smith Cloud, which contains several million solar masses of neutral and warm ionized gas and is currently losing material to the Milky Way, adding angular momentum to the disk. It is several kpc in size and its tip lies 2 kpc below the Galactic plane. It appears to have no stellar counterpart, but could contain a stellar population like that of the dwarf galaxy Leo P. There are suggestions that its existence and survival require that it be embedded in a dark matter halo of a few 108 solar masses.

Keywords

Galaxy: evolutionGalaxy: formationGalaxy: halogalaxies: ISM
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S315: From Interstellar Clouds to Star-Forming Galaxies: Universal Processes? , August 2015 , pp. 9 - 12
Copyright
Copyright © International Astronomical Union 2016 

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