The winds of solar-like main sequence stars
The winds of solar-like main sequence stars
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类太阳主序星的风
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Zank
中科院分区：
文献类型：
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作者：
B. Wood;S. Redfield;J. Linsky;H. Müller;G. Zank
我们最近完成了一项调查档案Lyα光谱的冷主序星在100秒差距内使用数据从哈勃太空望远镜。H I Lyα吸收线的分析部分是为了测量星际介质沿着观测视线的性质，但主要目标是从外部日光层和被观测恒星周围的类似天体层中寻找H I吸收的证据。天体层的吸收特别令人感兴趣，因为它提供了第一种可以探测类太阳恒星日冕风的方法。我们在这里报告7个新探测到的天体层吸收，虽然2个是边际，和4个新探测到的日光层吸收。这大约是以前天体层和日光层吸收探测数量的两倍。我们报告的初步努力，使用天体探测测量质量损失率所观察到的冷恒星的结果，我们做了一些初步的推断，这些测量意味着如何质量损失与年龄和活动的类太阳恒星。
We have recently completed a survey of archival Lyα spectra of cool main sequence stars within 100 pc using data from the Hubble Space Telescope. The H I Lyα absorption lines were analyzed in part to measure properties of the interstellar medium along the observed lines of sight, but the primary goal was to search for evidence of H I absorption from the outer heliosphere and from the analogous astrospheres surrounding the observed stars. The astrospheric absorption is of particular interest because it provides the first method by which one can detect the coronal winds of solar-like stars. We report here 7 new detections of astrospheric absorption, although 2 are marginal, and 4 new detections of heliospheric absorption. This roughly doubles the number of previous astrospheric and heliospheric absorption detections. We report the results of preliminary efforts to use the astrospheric detections to measure mass loss rates for the observed cool stars, and we make some preliminary inferences on what these measurements imply for how mass loss relates to age and activity for solar-like stars.