Pumping Mechanisms for SiO Masers around VX Sgr

摘要：

VX Sgr, a semi-regular variable, is a red giant star with intense SiO maser emission at 43 GHz. The pumping mechanism of the circumstellar SiO masers has been controversial for decades since its discovery. In order to pursue this long-standing problem further, we have carried out simultaneous VLBA observations of two 7 mm SiO masers at five epochs in about two years. We present relatively aligned v=1 and v=2, J=1-0 SiO maser maps and discuss the dominant pumping mechanism, which may be epoch dependent or a combination of both mechanisms.

作者: J.B.Su Z.-Q.Shen X.Chen Jiyune Yi D.R.Jiang Y.J.Yun

作者单位: Shanghai Astronomical Observatory,Chinese Academy of Sciences,Shanghai 200030,China Korea Astronomy and Space Science Institute,Daejeon 305-348,South Korea Department of Physics and Astronomy,Seoul National University,Seoul,South Korea

会议类型: 国际会议

会议名称: International Conference of Multiwavelength Variability of Blazars(Blazar多波段光变国际学术会议)

会议地点: 广州

会议语种:英文

页码: 261-264

在线出版日期: 2010-09-20（万方平台首次上网日期，不代表论文的发表时间）