SiO脉泽对晚型恒星的VLBA偏振监测

Vistas in Astronomy Pub Date : 1997-01-01 DOI:10.1016/S0083-6656(97)00028-7

P.J. Diamond, A.J. Kemball, D.A. Boboltz

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引用次数: 5

摘要

利用VLBA对三颗晚型恒星43 GHz, v = 1, J = 1-0 SiO脉泽的总强度和极化结构进行了监测。我们的数据显示，环状和弧形发射是观测到的普遍的总强度结构。相干结构在线偏振发射中也很明显。剧烈的结构变化很常见:相隔6个月拍摄的照片往往彼此之间没有什么关系。基于圆极化测量，我们估计SiO脉泽位置的典型磁场强度为~ 5-10 G。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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VLBA polarization monitoring of SiO masers towards late-type stars

We have used the VLBA to conduct a monitoring campaign of the total intensity and polarization structure of the 43 GHz, v = 1, J = 1-0 SiO masers from three late-type stars. Our data reveal that rings and arcs of emission are the prevalent total intensity structure observed. Coherent structures are also evident in the linearly polarized emission. Dramatic structural variations are common: images taken 6 months apart often bear little relationship to each other. Based on circular polarization measurements we estimate the typical magnetic field strength at the position of the SiO masers to be ∼5–10 G.

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