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Variability of Class II methanol masers in massive star forming regions

Published online by Cambridge University Press:  24 July 2012

Sharmila Goedhart ,
Mike Gaylard  and
Johan van der Walt
Sharmila Goedhart
Affiliation:
SKA SA, Third Floor, The Park, Park Rd, Pinelands 7405, South Africa Hartebeesthoek Radio Astronomy Observatory, PO Box 443, Krugersdorp 1740, South Africa
Mike Gaylard
Affiliation:
Hartebeesthoek Radio Astronomy Observatory, PO Box 443, Krugersdorp 1740, South Africa
Johan van der Walt
Affiliation:
Centre for Space Research, North-West University, Private Bag X6001, Potchefstroom 2520, South Africa
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Abstract

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Class II methanol masers are known to be tracers of an early phase of massive star formation. The 6.7- and 12.2-GHz methanol maser transitions can show a significant amount of variability, including periodic variations. Studying maser variability can lead to important insights into conditions in the maser environment but first the maser time-series need to be characterised. The results of long-term monitoring of 8 regularly-varying sources will be presented and methods of period-search discussed.

Keywords

masersradio lines: ISMstars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S287: Cosmic Masers - from OH to H0 , January 2012 , pp. 85 - 92
Copyright
Copyright © International Astronomical Union 2012

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