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首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Japanese VLBI Network Observations of SiO Masers in the M-Type Giant IRC —10414
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Japanese VLBI Network Observations of SiO Masers in the M-Type Giant IRC —10414

机译：日本VLBI网络对M型巨型IRC — 10414中SiO Masers的观察

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摘要

We present two-epoch maps of SiO masers (v = 1 and v = 2, J = 1-0) associated with the M-type star IRC -10414, which were obtained with the Japanese VLBI Network (JVN). The spatial and Doppler velocity distributions, and the intensity ratio of the v = 1 to v = 2 (J＝1-0) lines have significantly changed for eight years since our previous Very Long Baseline Array (VLBA) observation. The maser proper motions revealed by these twoepoch observations with an interval of one month are quite random and too fast to be explained by ballistic motions of the maser clumps. The maser distributions seen in the present observations cannot be explained by a rotatinginfalling ring model implied in the previous work. We discuss the kinematical relation between the SiO and H_2O masers in IRC -10414. In the present observations, the scale sizes of SiO v = 1 and v = 2 masers in IRC -10414 were roughly equal, as observed in typical Mira variables.
机译：我们呈现了与日本VLBI网络（JVN）获得的与M型星IRC -10414相关的SiO masers（v = 1和v = 2，J = 1-0）的两个时期图。自从我们先前的超长基线阵列（VLBA）观测以来，空间和多普勒速度分布以及v = 1与v = 2（J ＝ 1-0）线的强度比已经显着变化了八年。这些两次历时间隔一个月的观测所揭示的maser适当运动是相当随机的，而且太快了，无法用maser团的弹道运动来解释。在目前的观测中看到的maser分布不能用先前工作中暗示的旋转内陷环模型来解释。我们讨论了IRC -10414中SiO和H_2O masers之间的运动学关系。在目前的观察中，如在典型Mira变量中所观察到的，IRC -10414中SiO v = 1和v = 2 masers的尺度大小大致相等。

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