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The atomic hydrogen/molecular cloud association: an unavoidable relationship

Published online by Cambridge University Press:  03 August 2017

G. Joncas
G. Joncas*
Affiliation:
Dept. de Physique, Universit é Laval and Observatoire Astronomique du mont Mégantic, Québec, Québec, Canada G1K 7P4

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The presence of HI in the interstellar medium is ubiquitous. HI is the principal actor in the majority of the physical processes at work in our Galaxy. Restricting ourselves to the topics of this symposium, atomic hydrogen is involved with the formation of molecular clouds and is one of the byproducts of their destruction by young stars. HI has different roles during a molecular cloud's life. I will discuss here a case of coexisting HI and H2 at large scale and the origin of HI in star forming regions. For completeness' sake, it should be mentionned that there are at least three other aspects of HI involvement: HI envelopes around molecular clouds, the impact of SNRs (see work on IC 443), and the role of HI in quiescent dark clouds (see van der Werf's work).

Type
Large Scale Structure
Information
Symposium - International Astronomical Union , Volume 147: Fragmentation of Molecular Clouds and Star Formation , 1991 , pp. 37 - 40
Copyright
Copyright © Kluwer 1991 

References

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