The local interstellar medium toward the center of Loop I
The local interstellar medium toward the center of Loop I
复制标题
朝向 Loop I 中心的局部星际介质
DOI：
10.1086/169995
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
G. Vladilo
中科院分区：
文献类型：
--
作者：
M. Centurión;G. Vladilo
本研究分析了在l = 310-330度，B = 15-25度区域内邻近恒星的光学和紫外光谱。紫外光谱的分析揭示了一个突然的气柱密度增加，作为距离的函数，从10到18到10到20/平方厘米，这表明存在一个距离太阳40 +或{-} 25 pc的气体壁;这限制了到太阳周围的软X射线发射腔的边界的距离，或“局部气泡”，往一号环路中心的方向在更远的距离，近似恒定的N（H I），加上光谱中缺乏星际成分，暗示着另一个低密度气柱的存在，可以用Loop I气泡来识别。参考文献51篇。
The present study of the local insterstellar medium toward the center of Loop I analyzes optical and UV spectra of nearby stars within the l = 310-330 deg, b = 15-25 deg area. The analysis of the UV spectra reveals a sudden gas-column density increase as a function of distance from 10 to the 18th to 10 to the 20th/sq cm, suggesting the presence of a wall of gas 40 + or {minus} 25 pc from the sun; this constrains the distance to the boundary of the soft X-ray emitting cavity around the sun, or 'Local Bubble', in the direction toward the Loop I center. At greater distances, the approximately constant N(H I), in conjunction with the lack of interstellar components in the optical spectra, are suggestive of the presence of another low-density gas column which can be identified with the Loop I Bubble. 51 refs.