Morphology and Ionization of the Interstellar Cloud Surrounding the Solar System
Morphology and Ionization of the Interstellar Cloud Surrounding the Solar System
复制标题
太阳系周围星际云的形态和电离
DOI：
10.1126/science.265.5177.1423
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发表时间：
1994
期刊：
影响因子：
56.9
通讯作者：
P. Frisch
中科院分区：
文献类型：
--
作者：
P. Frisch
太阳与周围星际云的第一次相遇似乎发生在 2000 至 8000 年前。太阳和云层的空间运动几乎是垂直的，这表明太阳正在掠过云层表面。从太阳系异常宇宙线群的碳成分以及朝向天狼星的 Mg+ 与 Mg� 的星际比率得出的周围云的电子密度支持云电离的平衡模型（电子密度为每立方厘米 0.22 至 0.44）。迎风磁场方向几乎平行于云面。太阳-云的相对运动表明太阳系存在弓形激波。
The first encounter between the sun and the surrounding interstellar cloud appears to have occurred 2000 to 8000 years ago. The sun and cloud space motions are nearly perpendicular, an indication that the sun is skimming the cloud surface. The electron density derived for the surrounding cloud from the carbon component of the anomalous cosmic ray population in the solar system and from the interstellar ratio of Mg+ to Mg� toward Sirius support an equilibrium model for cloud ionization (an electron density of 0.22 to 0.44 per cubic centimeter). The upwind magnetic field direction is nearly parallel to the cloud surface. The relative sun-cloud motion indicates that the solar system has a bow shock.