The circumstellar envelope of VX Sgr

The circumstellar envelope of VX Sgr

An analysis of VLBI observations of SiO masers and MERLIN observations of H2O and OH masers of VX Sgr is presented. The SiO, H2O, OH 1665/7, and OH 1612 masers are found to occur on a few separated shells, and the order of magnitude of their radii ranges from 10 exp 14 to 10 exp 16. It is also found...

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Veröffentlicht in:Astrophysics and space science 1992-06, Vol.192 (1), p.53-62
1. Verfasser: Zhiyao, Yu
Format: Artikel
Sprache:eng
Schlagworte:
Astronomy
Earth, ocean, space
Exact sciences and technology
Long-period variables (miras) and semiregulars
Stars
Variable and peculiar stars (including novae)
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Zusammenfassung:An analysis of VLBI observations of SiO masers and MERLIN observations of H2O and OH masers of VX Sgr is presented. The SiO, H2O, OH 1665/7, and OH 1612 masers are found to occur on a few separated shells, and the order of magnitude of their radii ranges from 10 exp 14 to 10 exp 16. It is also found that the expanding velocity of the shells increases with their radius. In the OH 1612 maser region, an ice layer covers the surface of dust and grain of silicate. (V.L.)
ISSN:0004-640X
1572-946X
DOI:10.1007/BF00653259