Hostname: page-component-78c5997874-fbnjt Total loading time: 0 Render date: 2024-11-19T03:45:49.461Z Has data issue: false hasContentIssue false
  • English
  • Français

Interferometry of class I methanol masers, statistics and the distance scale

Published online by Cambridge University Press:  16 July 2018

Maxim A. Voronkov ,
Shari L. Breen ,
Simon P. Ellingsen  and
Christopher H. Jordan
Maxim A. Voronkov
Affiliation:
CSIRO Astronomy and Space Science, PO Box 76, Epping, NSW 1710, Australia email: [email protected] School of Mathematics and Physics, University of Tasmania, GPO Box 252-37, Hobart, Tas 7000, Australia
Shari L. Breen
Affiliation:
Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, Sydney, NSW 2006, Australia School of Mathematics and Physics, University of Tasmania, GPO Box 252-37, Hobart, Tas 7000, Australia
Simon P. Ellingsen
Affiliation:
School of Mathematics and Physics, University of Tasmania, GPO Box 252-37, Hobart, Tas 7000, Australia
Christopher H. Jordan
Affiliation:
International Centre for Radio Astronomy Research, Curtin University, Bentley, WA 6845, Australia
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.

The Australia Telescope Compact Array (ATCA) participated in a number of survey programs to search for and image common class I methanol masers (at 36 and 44 GHz) with high angular resolution. In this paper, we discuss spatial and velocity distributions revealed by these surveys. In particular, the number of maser regions is found to fall off exponentially with the linear distance from the associated young stellar object traced by the 6.7-GHz maser, and the scale of this distribution is 263±15 milliparsec. Although this relationship still needs to be understood in the context of the broader field, it can be utilised to estimate the distance using methanol masers only. This new technique has been analysed to understand its limitations and future potential. It turned out, it can be very successful to resolve the ambiguity in kinematic distances, but, in the current form, is much less accurate (than the kinematic method) if used on its own.

Keywords

masersISM: moleculesstars: formation
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. 158 - 161
Copyright
Copyright © International Astronomical Union 2018 

References

Batrla, W., Matthews, H. E., Menten, K. M., & Walmsley, C. M., 1987, Nature, 326, 49CrossRefGoogle Scholar
Green, J. A., Breen, S. L., Fuller, G. A., McClure-Griffiths, N. M., Ellingsen, S. P., Voronkov, M. A., Avison, A., Brooks, K., Burton, M. G., Chrysostomou, A., Cox, J., Diamond, P. J., Gray, M. D., Hoare, M. G., Masheder, M. R. W., Pestalozzi, M., Phillips, C., Quinn, L. J., Richards, A. M. S., Thompson, M. A., Walsh, A. J., Ward-Thompson, D., Wong-McSweeney, D., & Yates, J. A., 2017, MNRAS, 469, 1383CrossRefGoogle Scholar
Green, J. A. & McClure-Griffiths, N. M., 2011, MNRAS, 368, 1843Google Scholar
Jordan, C. H., Walsh, A. J., Breen, S. L., Ellingsen, S. P., Voronkov, M. A., & Hyland, L. J., 2017, MNRAS, 471, 3915CrossRefGoogle Scholar
Jordan, C. H., Walsh, A. J., Lowe, V., Voronkov, M. A., Ellingsen, S. P., Breen, S. L., Purcell, C. R., Barnes, P., Burton, M. G., Cunningham, M. R., Hill, T., Jackson, J. M., Longmore, S. N., Peretto, N., & Urquhart, J. S., 2015, MNRAS, 448, 2344CrossRefGoogle Scholar
Kurtz, S., Hofner, P., & Alvarez, C. V., 2004, ApJS, 155, 149CrossRefGoogle Scholar
Reid, M. J., Dame, T. M., Menten, K. M., & Brunthaler, A., 2016, ApJ, 823, 77CrossRefGoogle Scholar
Sobolev, A. M., Cragg, D. M., Ellingsen, S. P., Gaylard, M. J., Goedhart, S., Henkel, C., Kirsanova, M. S., Ostrovskii, A. B., Pankratova, N. V., Shelemei, O. V., van der Walt, D. J., Vasyunina, T. S., & Voronkov, M. A. 2007, in: Chapman, J. M. & Baan, W. A. (eds.), Proc. IAU Symp. 242, Astrophysical Masers and their Environments (Cambridge Univ. Press), p. 81Google Scholar
Voronkov, M. A., Caswell, J. L., Ellingsen, S. P., Green, J. A., & Breen, S. L., 2014, MNRAS, 439, 2584CrossRefGoogle Scholar
Voronkov, M. A., Caswell, J. L., Ellingsen, S. P., & Sobolev, A. M., 2010, MNRAS, 405, 2471Google Scholar