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Preliminary Results of a Survey of Ultracompact H II Regions

Published online by Cambridge University Press:  25 April 2016

A. J. Walsh ,
A. R. Hyland ,
G. Robinson ,
T. L. Bourke  and
S. D. James
A. J. Walsh
Affiliation:
Department of Astrophysics and Optics, School of Physics, University of New South Wales, NSW 2052, Australia. ajw@newt.phys.unsw.edu.au
A. R. Hyland
Affiliation:
Faculty of Science, University of New South Wales, NSW 2052, Australia. H.Hyland@unsw.edu.au
G. Robinson
Affiliation:
Department of Physics, University of College, Australian Defence Force Academy, University of New South Wales, Canberra, ACT 2600, Australia. garry@phadfa.ph.adfa.oz.au, tlb@phadfa.ph.adfa.oz.au, steve@phadfa.ph.adfa.oz.au
T. L. Bourke
Affiliation:
Department of Physics, University of College, Australian Defence Force Academy, University of New South Wales, Canberra, ACT 2600, Australia. garry@phadfa.ph.adfa.oz.au, tlb@phadfa.ph.adfa.oz.au, steve@phadfa.ph.adfa.oz.au
S. D. James
Affiliation:
Department of Physics, University of College, Australian Defence Force Academy, University of New South Wales, Canberra, ACT 2600, Australia. garry@phadfa.ph.adfa.oz.au, tlb@phadfa.ph.adfa.oz.au, steve@phadfa.ph.adfa.oz.au
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Abstract

Ultracompact H II regions are small, dense regions of ionised gas surrounding high-mass stars which are still embedded in their natal molecular clouds. A survey of such regions has been commenced in an attempt to improve our understanding of the processes of high-mass star formation. The initial stages of the survey have involved selection of likely candidates from the IRAS Point Source Catalogue, correlation with radio continuum emission at 4·85 GHz and subsequent observations of methanol maser emission at 6·668 GHz. Preliminary results of the methanol maser survey are given.

Keywords

masers — nebulaeH II regions — radio sourceslines — starsformation
Type
Galactic and Stellar
Information
Publications of the Astronomical Society of Australia , Volume 12 , Issue 2 , August 1995 , pp. 186 - 189
Copyright
Copyright © Astronomical Society of Australia 1995

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