The Scale Height of Giant Molecular Clouds Is Less than That of Smaller Clouds
The Scale Height of Giant Molecular Clouds Is Less than That of Smaller Clouds
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巨型分子云的尺度高度小于较小分子云的尺度高度
DOI：
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发表时间：
2004
期刊：
影响因子：
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通讯作者：
Youngung Lee
中科院分区：
文献类型：
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作者：
A. Stark;Youngung Lee
在贝尔实验室13 CO J = 1 → 0银河系巡天中使用了一种天线温度阈值算法来创建一个包含1400个分子云的目录。其中，281个云被选择为具有良好的确定的运动学距离。对云样本的尺度高度、光度、内部速度色散和大小进行了分析，结果表明，小于~105.5 M的云的尺度高度约为35 pc，大致与云质量无关，而较大的云，即巨型分子云，其尺度高度随着云质量的增加而减小。
An antenna temperature thresholding algorithm is used on the Bell Laboratories 13CO J = 1 → 0 Milky Way Survey to create a catalog of 1400 molecular clouds. Of these, 281 clouds are selected for having well-determined kinematic distances. The scale height, luminosity, internal velocity dispersion, and size of the cloud sample are analyzed to show that clouds smaller than ~105.5 M☉ have a scale height which is about 35 pc, roughly independent of cloud mass, while larger clouds, the giant molecular clouds, have a reduced scale height which declines with increasing cloud mass.