Observational characteristics of SiO masers around VX Sgr

作者：Jiang-Bo Su,Zhi-Qiang Shen,Xi Chen,Jing Liu,Yan Wang,Yi-Bin Zhao

摘要：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.

发文机构：Department of Physics and Electronics Shanghai Astronomical Observatory Center for Astrophysics

关键词：MASERSstars:individual(VXSgr)techniques:interferometricturbulence

分类号： P15[天文地球—天文学]