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A 3mm SiO maser survey in the galactic bulge region

Published online by Cambridge University Press:  03 August 2017

Everton Lüdke ,
Victor Migenes ,
Ramesh Balasubramanyam  and
Nadiane C. Cassol
Everton Lüdke
Affiliation:
Universidade Federal de Santa Maria, CCNE-DEFIS-LARIE, Santa Maria RS 97150-900, Brazil
Victor Migenes
Affiliation:
Universidad de Guanajuato, Depto. de Astronomía, Aptdo. postal 144, GTO CP36000, Mexico
Ramesh Balasubramanyam
Affiliation:
The University of New South Wales, School of Physics, Sydney NSW 2052, Australia
Nadiane C. Cassol
Affiliation:
Universidade Federal de Santa Maria, CCNE-DEFIS-LARIE, Santa Maria RS 97150-900, Brazil

Abstract

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We have made a blind survey of SiO masers, of the J=2-1 v = 1 transition, toward 106 bright OH/IR stars which have been previously detected in the OH main line at 1662 MHz with the ATCA in the galactic bulge by Sevenster et al (2000) and in the galactic disk at J=1-0 (v = 1 − 2) line by Miyazaki (2001). A comparison with published data shows that new SiO masers are detected for OH/IR stars in the galactic center, suggesting that those stars are undergoing strong mass loss with dense circumstellar envelopes with apparent angular sizes far smaller than the OH maser shell as obtained by interferometric observations. At the moment, our detection rate is about 23% and it may be increased when the project is completed.

Type
Part 2. Stellar Masers
Information
Symposium - International Astronomical Union , Volume 206: Cosmic Masers: From Protostars to Blackholes , 2002 , pp. 294 - 296
Copyright
Copyright © Astronomical Society of the Pacific 2002 

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