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G305.20+0.21: A very young class II methanol maser source

Published online by Cambridge University Press:  03 August 2017

Andrew J. Walsh
Andrew J. Walsh*
Affiliation:
Max-Planck-Institut für Radioastronomie, auf dem Hügel 69, Bonn 53121, Germany

Abstract

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Sensitive radio continuum observations of G305.20+0.21 are performed to look for evidence of an ultracompact HII region. None is found at either 8.64 or 4.8GHz above a 5σ detection limit of about 0.25mJy in both cases. Since G305.20+0.21 is such a bright infrared source, there is a large discrepancy between the expected radio flux and the observed upper limits. This is interpreted as evidence that G305.20+0.21 is a massive protostar traced by a methanol maser site.

Type
Part 1. Star Formation
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 155 - 158
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Forster, J. R., & Caswell, J. L., 2000, ApJ, 530, 371 CrossRefGoogle Scholar
Kurtz, S., Churchwell, E., & Wood, D. O. S., 1994, ApJS, 91, 659 CrossRefGoogle Scholar
Menten, K. M., 1991, ApJ, 380, L75 CrossRefGoogle Scholar
Molinari, S., Brand, J., Cesaroni, R., & Palla, F., 2000, A&A, 355, 617 Google Scholar
Norris, R. P., Whiteoak, J. B., Caswell, J. L., Wieringa, M. H., & Gough, R. G., 1993, ApJ, 412, 222 CrossRefGoogle Scholar
Panagia, N., 1973, AJ, 78, 929 CrossRefGoogle Scholar
Walsh, A. J., Hyland, A. R., Robinson, G., & Burton, M. G., 1997, MNRAS, 291, 261 CrossRefGoogle Scholar
Walsh, A. J., Burton, M. G., Hyland, A. R., & Robinson, G., 1998, MNRAS, 301, 640 CrossRefGoogle Scholar
Walsh, A. J., Burton, M. G., Hyland, A. R., & Robinson, G., 1999, MNRAS, 309, 905 CrossRefGoogle Scholar