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The ATCA/VLA OH 1612 MHz survey: identification of post-AGB stars

Published online by Cambridge University Press:  03 August 2017

Jessica Chapman  and
Maartje Sevenster
Jessica Chapman
Affiliation:
Australia Telescope National Facility, PO Box 76, Epping, NSW 2121, Australia
Maartje Sevenster
Affiliation:
MSSSO/RSAA, Cotter Road, Weston ACT 2611, Australia

Abstract

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The ATCA/VLA Galactic Plane survey detected OH 1612 MHz maser emission from a total of 766 sources. In most cases the detected sources have double-peaked spectral profiles which are characteristic of OH/IR stars. A small number of sources however have irregular spectra and uncertain classifications. We discuss the maser results for two sources with irregular OH spectra, D046 (OH 326.5-0.4) and B292 (OH009.1-0.4). For B292 we detected OH 1720 MHz emission - a transition previously unknown for evolved stars. D046 has exceptionally broad maser profiles and strong non-thermal radio continuum emission. Both are likely to be bipolar post-AGB sources.

Post-AGB sources can be identified from their MSX far-infrared properties. For the ATCA/VLA OH-selected sample, most of the likely post-AGB stars do not have unusual OH 1612 MHz spectra.

Type
Part 2. Stellar Masers
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 331 - 334
Copyright
Copyright © Astronomical Society of the Pacific 2002 

References

Chapman, J.M., Cohen, R.J., 1985, MNRAS, 220, 513 CrossRefGoogle Scholar
Sevenster, M.N., 2001a, AJ, submitted Google Scholar
Sevenster, M.N., 2001b, AJ, submitted Google Scholar
Sevenster, M.N., Chapman, J.M., 2001, ApJ, 546, L119 CrossRefGoogle Scholar
Sevenster, M.N., Chapman, J.M., 2001, MNRAS, in preparation Google Scholar
Sevenster, M.N., Chapman, J.M., Habing, H.J., Killeen, N.E.B., Lindquist, M., 1997a, A&A Supp Ser, 122, 79 (paper I) CrossRefGoogle Scholar
Sevenster, M.N., Chapman, J.M., Habing, H.J., Killeen, N.E.B., Lindquist, M., 1997b, A&A Supp Ser, 124, 509 (paper II) CrossRefGoogle Scholar
Sevenster, M.N., van Langevelde, H.J., Moody, R.A., Chapman, J.M., Habing, H.J., Killeen, N.E.B., 2001, A&A, 366, 481 (paper III) Google Scholar
Welty, A.D., Fix, J.D., Mutel, R.L., 1987, ApJ, 318, 852 CrossRefGoogle Scholar
Zijlstra, A.A., Chapman, J.M., te Lintel Hekkert, P., Likkel, L., Comeron, F., Norris, R.P., Molster, F.J., Cohen, R.J., 2001, MNRAS, 322, 280 CrossRefGoogle Scholar