Correlation of circumstellar SiO maser spot distribution with the stellar light curve

[摘要] We have investigated the distributions of silicon monoxide (SiO) v = 2 and v = 3 J = 1 → 0 masers around long-period variables (LPVs) in VLBI observations using the VLBI Exploration of Radio Astrometry (VERA) combined with the Nobeyama 45 m telescope. We find some examples of correlation of a maser spot distribution with the stellar light curve, which may provide a clue to elucidating the pumping mechanism of circumstellar SiO masers.

[发布机构] Kagoshima University, Japan^1;National Astronomical Observatory of Japan, Japan^2;Ural Federal University, Russia^3;Korean Astronomy and Space Science Institute, Korea, Republic of^4

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Circumstellar;Light curves;Long period variables;Pumping mechanism;Silicon monoxide;Spot distribution;VLBI observations