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Polarization of 6.0-GHz OH masers in W3(OH)

Published online by Cambridge University Press:  01 March 2007

L. Harvey-Smith ,
R. Soria-Ruiz ,
A. M. S. Richards  and
R. J. Cohen
L. Harvey-Smith
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA, The Netherlands.
R. Soria-Ruiz
Affiliation:
Joint Institute for VLBI in Europe, Postbus 2, 7990 AA, The Netherlands.
A. M. S. Richards
Affiliation:
Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK.
R. J. Cohen
Affiliation:
Jodrell Bank Observatory, Macclesfield, Cheshire, SK11 9DL, UK (Deceased)
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Abstract

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We present preliminary results of a MERLIN polarization study of 6.0-GHz OH masers in the W3(OH) region of massive star-formation. We have detected a small but significant amount of linear polarization in the 6031-MHz masers, as well as a much larger fraction of circular polarization. We have found many Zeeman pairs, the analysis of which (along with the results at 6035-MHz) will be presented elsewhere. MERLIN is well-suited to detecting all the single-dish maser flux in these regions, owing to its range of short baselines (tens of kilometers) and resulting sensitivity to extended emission. We have found core-halo structure in the 6031-MHz OH maser emission in the region of the highly extended 4.7-GHz OH and 6.7-GHz methanol maser filament found by Harvey-Smith & Cohen (2005, 2006).

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 3 , Symposium S242: Astrophysical Masers and their Environments , March 2007 , pp. 156 - 157
Copyright
Copyright © International Astronomical Union 2008

References

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