Hostname: page-component-cd9895bd7-fscjk Total loading time: 0 Render date: 2024-12-28T15:26:46.619Z Has data issue: false hasContentIssue false
  • English
  • Français

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
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

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 

References

Argo, M. K., Pedlar, A., Beswick, R. J., & Muxlow, T. W. B. 2007 MNRAS, 380, 596Google Scholar
Argo, M. K., Pedlar, A., Beswick, R. J., Muxlow, T. W. B., & Fenech, D. 2010 MNRAS, 402, 2703Google Scholar
Argo, M. K., Beswick, R. J., Muxlow, T. W. B., Fenech, D. M., van Langevelde, H. J., Gendre, M., & Pedlar, A. 2012 Proceedings of the 11th European VLBI Network Symposium, Bordeaux, France, arXiv:1301.4820Google Scholar
Brunthaler, A., Martí-Vidal, I., Menten, K. M., Reid, M. J., Henkel, C., Bower, G. C., Falcke, H., Feng, H., Kaaret, P., Butler, N. R., Morgan, A. N., & Weiß, A. 2010 Astron. Astrophys, 516, A27Google Scholar
Fenech, D., Beswick, R., Muxlow, T. W. B., Pedlar, A., & Argo, M. K. 2010 MNRAS, 408, 607Google Scholar
Freedman, W. L., Hughes, S. M., Madore, B. F., Mould, J. R., Lee, M. G., Stetson, P., Kennicutt, R. C., Turner, A., Ferrarese, L., Ford, H., Graham, J. A., Hill, R., Hoessel, J. G., Huchra, J., & Illingworth, G. D. 1994 ApJ, 427, 628Google Scholar
Lonsdale, C. J., Lonsdale, C. J., Diamond, P. J., & Smith, H. E. 1998 Astrophys. J. Letters, 493, L13Google Scholar
McDonald, A. R., Muxlow, T. W. B., Wills, K. A., Pedlar, A., & Beswick, R. J. 2002 MNRAS, 334, 912Google Scholar
Muxlow, T. W. B., Beswick, R. J., Garrington, S. T., Pedlar, A., Fenech, D. M., Argo, M. K., van Eymeren, J., Ward, M., Zezas, A., & Brunthaler, A. MNRAS, 404, L109Google Scholar
Nguyen-Q-Rieu; Mebold, U., Winnberg, A., Guibert, J., & Booth, R. 1976 Astron. Astrophys., 52, 467Google Scholar
Seaquist, E. R., Frayer, D. T., & Frail, D. A. 1997 ApJL, 487, L131Google Scholar
Weliachew, L., Fomalont, E. B., & Greisen, E. W. 1984 Astron. Astrophys., 137, 335Google Scholar
Wills, K. A., Das, M., Pedlar, A., Muxlow, T. W. B., Robinson, T. G. 2000 MNRAS, 316, 33Google Scholar