Pumping Mechanisms for SiO Masers around VX Sgr

Pumping Mechanisms for SiO Masers around VX Sgr
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VX Sgr 周围 SiO 微波激射器的泵浦机制

DOI:
10.1007/s12036-011-9002-y
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发表时间:
2011
期刊:
影响因子:
--
通讯作者:
Y. Yun
Y. Yun
中科院分区:
--
文献类型:
--
作者:
J. Su;Z. Shen;X. Chen;Jiyune Yi;D. Jiang;Y. Yun

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VX Sgr是一颗半正则变星,是一颗在43 GHz处具有强烈SiO脉泽辐射的红巨星星星。星周SiO脉泽的抽运机制自发现以来一直存在争议。为了进一步研究这个长期存在的问题,我们在两年左右的时间里对两个7 mm SiO脉泽同时进行了五个历元的VLBA观测。我们给出了相对对准的π = 1和π = 2,J= 1-0的SiO脉泽图,并讨论了主要的泵浦机制,它可能是与时代有关的,也可能是两种机制的组合。
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 alignedυ= 1 andυ= 2,J= 1–0 SiO maser maps and discuss the dominant pumping mechanism, which may be epoch dependent or a combination of both mechanisms.
VX 人马座周围紧凑 SiO 脉泽的向内运动
DOI: 10.1086/500168
发表时间: 2006-04-01
影响因子: 4.9
作者:
Chen, X;Shen, ZQ;Kamohara, R
通讯作者: Kamohara, R