Hostname: page-component-7c8c6479df-8mjnm Total loading time: 0 Render date: 2024-03-28T20:54:13.636Z Has data issue: false hasContentIssue false

VLBI studies of SiO masers around VX Sagittarii

Published online by Cambridge University Press:  01 March 2007

X. Chen
Affiliation:
Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai 200030, PR China email: chenxi@shao.ac.cn, zshen@shao.ac.cn, djiang@shao.ac.cn Department of Earth Sciences, National Taiwan Normal University, 88 Sec. 4, Ting-Chou Rd., Taipei 116, Taiwan
Z.-Q. Shen
Affiliation:
Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai 200030, PR China email: chenxi@shao.ac.cn, zshen@shao.ac.cn, djiang@shao.ac.cn
D.-R. Jiang
Affiliation:
Shanghai Astronomical Observatory, 80 Nandan Road, Shanghai 200030, PR China email: chenxi@shao.ac.cn, zshen@shao.ac.cn, djiang@shao.ac.cn
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.

Observations of 43 GHz 28SiO (v = 1, J = 1-0) masers in the circumstellar envelope of the M-type semi-regular variable star VX Sgr were performed using the VLBA at 3 epochs during 1999 April-May. By tracing 42 matched maser features appearing in all the three epochs, we determined the contraction of an SiO maser shell toward VX Sgr at a velocity of about 4 km s−1 at a distance of 1.7 kpc to VX Sgr. We also report on some preliminary results from our first epoch of simultaneous VLBA observations of three 7 mm SiO masers toward VX Sgr.

Type
Contributed Papers
Copyright
Copyright © International Astronomical Union 2008

References

Boboltz, D. A., Diamond, P. J., & Kemball, A. J. 1997, ApJ, 487, L147CrossRefGoogle Scholar
Chen, X., Shen, Z.-Q., Imai, H. et al. , 2006, ApJ, 640, 982CrossRefGoogle Scholar
Chen, X., Shen, Z.-Q., & Xu, Y. 2007, ChJAA, (in press)Google Scholar
Diamond, P. J., & Kemball, A. J. 2003, ApJ, 599, 1372CrossRefGoogle Scholar
Humphreys, E. M. L., Gray, M. D., Yates, J. A., et al. 2002, A&A 386, 256Google Scholar