Dynamical Behavior of Gaseous Halo in a Disk Galaxy

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概要

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• Assuming that the gas in the halo a disk galaxy is supplied from he disk as a hot gas, we have studied its dynamical and thermal behavior by means of a time dependent, two-dimensional hydrodynamic code. Depending upon the temperature and density of the gas at the disk, three types of gaseous halo are formed, that is, a wind-type, a bound-type and a coopled-type halo. In the former two cases, the hot gaseous halo with the temperature higher than 3×10^5K is formed, and the X-ray emission of the luminosity 10_<37>^10_<39>ergs/s is expected in 0.3^4 keV region. In the cooled-type halo, the halo gas collapses to the disk plane after a rapid radiative cooling, and this will be observed as infalling, high-velocity clouds. Some discussions on the role of gaseous halo for a disk galaxy are given.

• 理論物理学刊行会の論文
• 1980-12-25

著者

• Habe Asao

  Department Of Physics Hokkaido University

• Ikeuchi Satoru

  Department Of Astrophysics Nagoya University

• Habe Asao

  Department Of Cosmosciences Graduate School Of Science Hokkaido University

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