Hostname: page-component-586b7cd67f-l7hp2 Total loading time: 0 Render date: 2024-11-27T06:52:57.067Z Has data issue: false hasContentIssue false
  • English
  • Français

86 GHz VLBI Imaging of the SiO Masers in VX Sgr

Published online by Cambridge University Press:  12 April 2016

S. S. Doeleman ,
C. J. Lonsdale  and
L. J. Greenhill
S. S. Doeleman
Affiliation:
Haystack Observatory, Westford, MA, U.S.A.
C. J. Lonsdale
Affiliation:
Haystack Observatory, Westford, MA, U.S.A.
L. J. Greenhill
Affiliation:
Harvard-CfA, Cambridge, MA, U.S.A.

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.

We present the first 86 GHz spectral line VLBI map. Strong SiO masers in the late type star VX Sgr are mapped with a relative astrometry of 0.15 mas revealing an irregular ring of maser emission that echos structure seen at 43 GHz. A surprising feature of this map is the detection of a large (0.5 km s−1 AU−1 ) linear velocity gradient that can be interpreted as rigid rotation of the circumstellar envelope.

Type
Research Article
Information
International Astronomical Union Colloquium , Volume 164: Radio Emission from Galactic and Extragalactic Compact Sources , 1998 , pp. 363 - 364
Copyright
Copyright © Astronomical Society of the Pacific 1998

References

Bujarrabal, V. 1994a. A&A, 285, 953–970.Google Scholar
Bujarrabal, V. 1994b. A&A, 285, 971–978.Google Scholar
Diamond, P.J. et al. 1994. ApJ, 430, L61–64.Google Scholar
Doeleman, S.S., Lonsdale, C.J., & Greenhill, L.J. 1997. ApJ, submitted.Google Scholar
Greenhill, L.J., et al. 1995, ApJ, 449, 365–375.Google Scholar
Kemball, A.J., & Diamond, P.J. 1997. ApJ, 481, Llll–114.Google Scholar
Lockett, P., & Elitzur, M. 1992. ApJ, 399, 704–713.Google Scholar
Miyoshi, M. et al. 1994. Nature, 371, 395–397.Google Scholar