Observational characteristics of SiO masers around VX Sgr

SiO maser VLBA observations toward VX Sgr are performed at five epochs, and lots of maser spots are obtained. We make a statistical analysis on these spots. It is shown that the apparent sizes and the fluxes of maser spots decrease with increasing the distance from the central star. In addition, the...

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Bibliographic Details
Published in:Research in astronomy and astrophysics 2020-12, Vol.20 (12), p.192-14
Main Authors: Su, Jiang-Bo, Shen, Zhi-Qiang, Chen, Xi, Liu, Jing, Wang, Yan, Zhao, Yi-Bin
Format: Article
Language:English
Subjects:
Fluxes
Masers
stars: individual (VX Sgr)
Statistical analysis
techniques: interferometric
turbulence
Citations: Items that this one cites
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Summary:SiO maser VLBA observations toward VX Sgr are performed at five epochs, and lots of maser spots are obtained. We make a statistical analysis on these spots. It is shown that the apparent sizes and the fluxes of maser spots decrease with increasing the distance from the central star. In addition, the similarity between the v = 1,2 (J = 1−0) spectrums increases with epochs, consistent with the full width at half maximum (FWHM), while the total fluxes increase. The results may be related to the changeable pumping mechanisms.
ISSN:1674-4527
DOI:10.1088/1674-4527/20/12/192