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HVCs, infall and the Galactic Fountain

Published online by Cambridge University Press:  05 March 2015

Bart P. Wakker
Affiliation:
supported by NASA/NSF; affiliated with Department of AstronomyUniversity of Wisconsin-Madison475 N Charter St, Madison, WI 53705, USA email: wakker@astro.wisc.edu
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Abstract

High-velocity clouds (HVCs) consist of gas that does not take part in normal Galactic rotation, having velocities deviating by up to 400 km s−1 from those expected from rotation. Over the past five decades, studies have shown they these clouds trace a number of different processes, including the Galactic Fountain, tidal streams, and infall. Here, I summarize some recent results concerning measurements of cloud metallicities and distances and how these are used to understand individual clouds and derive the conclusion above.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2015 

References

Fox, A., Savage, B., Wakker, B., et al. 2004, ApJ 602, 738CrossRefGoogle Scholar
Fox, A., Wakker, B., Smoker, J., et al. 2010, ApJ 718, 1046CrossRefGoogle Scholar
Gibson, B., Giroux, M., Penton, S., et al. 2000, AJ 120, 1830CrossRefGoogle Scholar
Wakker, B., York, D., Howk, J., et al. 2007, ApJ (Letters) 670, L113CrossRefGoogle Scholar
Wakker, B., York, D., Wilhelm, R., et al. 2008, ApJ, 672, 298CrossRefGoogle Scholar

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