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 

机构地区：[1]Department of Physics and Electronics,Yuncheng University,Yuncheng 044000,China [2]Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China [3]Center for Astrophysics,Guangzhou University,Guangzhou 510006,China

出　　处：《Research in Astronomy and Astrophysics》2020年第12期196-204,共9页天文和天体物理学研究（英文版）

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.U1431125 and U1631106);the Science and Technology Innovation Program of Shanxi Province(2019L0876);Yuncheng University(YQ-2019016)。

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.

关 键 词：MASERS stars:individual(VX Sgr) techniques:interferometric TURBULENCE 

分 类 号：P15[天文地球—天文学]