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GLOBULES, DARK CLOUDS, AND LOW MASS PRE-MAIN SEQUENCE STARS

Published online by Cambridge University Press:  14 August 2015

A. R. Hyland
A. R. Hyland*
Affiliation:
Mount Stromlo and Siding Spring Observatories, The Australian National University Canberra, Australia

Abstract

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The current observational and theoretical literature on Bok globules and their relationship to star formation is reviewed. Recent observations of globules at optical, infrared, and far infrared wavelengths are shown to provide important constraints on their structure and evolutionary status, and the suggestion that many globules are gravitationally unstable is seriously questioned.

Dark clouds associated with T associations are well-known sites of recent and continuing star formation. In recent years molecular observations and far infrared surveys have provided maps of such regions from which possible sites of star formation may be identified. Optical (Hα) and near infrared surveys have enabled a clear identification of pre-main sequence (PMS) objects within the clouds. Methods of distinguishing these from background objects and the nature of their infrared excesses are examined in the light of recent observations in the near and far infrared. The perennial question as to the existence of anomalous reddening within dark clouds is also investigated.

Type
Research Article
Information
Symposium - International Astronomical Union , Volume 96: Infrared Astronomy , 1981 , pp. 125 - 151
Copyright
Copyright © Reidel 1981 

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