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Spatially resolving the OH masers in M82

Published online by Cambridge University Press:  16 July 2018

Megan Argo
Megan Argo*
Affiliation:
Jeremiah Horrocks Institute, University of Central Lancashire, UK email: margo@uclan.ac.uk
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Abstract

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With luminosities between those of typical Galactic OH masers and more distant OH megamasers, the masers in the nearby galaxy M82 are an interesting population which can be used to probe the physical conditions in the central starburst region of this irregular galaxy. Following on from previous low spatial resolution studies, here we present the initial results of two high-resolution observations separated by eight years. We find that some of the maser spots are resolved into multiple spatial components when observed with the EVN, as predicted by our previous studies, but that significantly less flux is recovered that that seen with the previous VLA observations. We conclude that some of this flux difference is likely due to variability but that, in common with the results seen in Arp220, there may also be a significant diffuse component.

Keywords

masersgalaxies: individual (M82)
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S336: Astrophysical Masers: Unlocking the Mysteries of the Universe , September 2017 , pp. 121 - 124
Copyright
Copyright © International Astronomical Union 2018 

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