Dissipation of the Primordial Terrestrial Atmosphere Due to lrradiation of the Solar Far-UV during T Tauri Stage
スポンサーリンク
概要
- 論文の詳細を見る
If the Earth was formed in a stage before the gas of a solar nebula was dissipated, it was surrounded by a dense primitive atmosphere with the solar chemical composition. The atmosphere was gravitationally bound to the Earth after the solar nebula was dissipated by strong solar wind in a T Tauri stage. We calculate numerically the escape of this atmosphere due to heating by strong solar radiation, especially by far-UV radiation absorbed through photodissociation of water molecules. We assume that the flow of the atmospheric gas is spherically-symmetric and steady. The results show that the efficiency of mass loss by the far-UV radiation is very large compared with the case of EUV radiation, which was studied previously, and that the atmosphere was wholly dissipated within 2×10^7y, i.e., a typical period of the T Tauri stage, if the far-UV flux was more than 1×10^2 times as large as the present value. This flux is well expected from observations of T Tauri stars. The effect of solar wind is found to be unimportant.
- 理論物理学刊行会の論文
- 1981-10-25
著者
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Nakazawa Kiyoshi
Department of Cardiology, St. Marianna University School of Medicine
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SEKIYA Minoru
Department of Applied Physics, Tokyo Institute of Technology
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HAYASHI Chushiro
Department of Physics, Kyoto University
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Nakazawa Kiyoshi
Department Of Physics Kyoto University
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Hayashi Chushiro
Department Of Nuclear Science Kyoto University
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Sekiya Minoru
Department Of Physics Kyoto University
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Sekiya Minoru
Department Of Earth And Planetary Sciences Faculty Of Sciences 33 Kyushu University
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Sekiya Minoru
Department Of Applied Physics Tokyo Institute Of Technology
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Nakazawa Kiyoshi
Department Of Applied Physics Tokyo Institute Of Technology
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NAKAZAWA Kiyoshi
Department of Applied Physics, Tokyo Institute of Technology
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SEKIYA Makoto
Department of Physics, Kyoto University
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SEKIYA Minoru
Department of Physics, Kyoto University
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SEKIYA Minoru
Department of Earth and Planetary Sciences, Faculty of Sciences 33, Kyushu University
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HAYASHI Chushiro
Department of Nuclear Science : Research Institute for Fundamental Physics Kyoto University : National Aeronautics and Space Administration
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Nakazawa Kiyoshi
Gifu University
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