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Discovery of large-scale masers in W3(OH)

Published online by Cambridge University Press:  01 August 2006

L. Harvey-Smith  and
R. J. Cohen
L. Harvey-Smith
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA, The Netherlands. [email protected]
R. J. Cohen
Affiliation:
Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK. [email protected]
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Abstract

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We report a vast filament of hydroxyl and methanol maser emission surrounding the ultra-compact HII region W3(OH). The filament stretches 3100 AU and has a linear velocity gradient. By studying the velocity structure, line profiles and extended methanol maser structures we believe we have located the position of the central star and detected around it a circumstellar disc with a large velocity gradient of 47 km s−1 arcsec−1.

Keywords

masers(ISM:) HII regionsISM: moleculesradio lines: ISMstars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2 , Symposium S237: Triggered Star Formation in a Turbulent ISM , August 2006 , pp. 422
Copyright
Copyright © International Astronomical Union 2007

References

Harvey-Smith, L. & Cohen, R.J. 2005, MNRAS 356, 637Google Scholar
Harvey-Smith, L. & Cohen, R.J. 2006, MNRAS 371, 1550Google Scholar