Dissipation of the Primordial Terrestrial Atmosphere Due to irradiation of the Solar EUV

SEKIYA Minoru, NAKAZAWA Kiyoshi, HAYASHI Chushiro, of Physics Kyoto University Department, of Physics Kyoto University Department, of Physics Kyoto University Department

研究成果: ジャーナルへの寄稿記事

抄録

The escape of a primordial Earth's atmosphere due to heating by solar radiation is studied by integrating numerically hydrodynamic equations for steady and spherically-symmetric outflow of hydrogen molecules and helium atoms. As heating sources, we take account of (1) the solar EUV radiation which is expected to be very strong during the T Tauri stage, (2) the solar visible light and (3) the release of gravitational energy of accreting planetesimals. The effect of solar wind is neglected but the condition of this neglect is estimated. The results show that the pimordial atmosphere, having existed in the early stage of the Earth's history, is dissipated within a period of 5×10^8 y, which is the upper limit imposed from the origin of the present terrestrial atmosphere, as far as the solar EUV flucx is more than 2×10^2 times as large as the present one.
元の言語英語
ページ(範囲)1968-1985
ページ数18
ジャーナルProgress of Theoretical Physics
64
発行部数6
DOI
出版物ステータス出版済み - 12 25 1980
外部発表Yes

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solar radiation
dissipation
atmospheres
irradiation
heating
protoplanets
hydrodynamic equations
Earth atmosphere
helium atoms
solar wind
escape
histories
hydrogen
atoms
molecules
energy

これを引用

Minoru, SEKIYA., Kiyoshi, NAKAZAWA., Chushiro, HAYASHI., Department, O. P. K. U., Department, O. P. K. U., & Department, O. P. K. U. (1980). Dissipation of the Primordial Terrestrial Atmosphere Due to irradiation of the Solar EUV. Progress of Theoretical Physics, 64(6), 1968-1985. https://doi.org/10.1143/PTP.64.1968

Dissipation of the Primordial Terrestrial Atmosphere Due to irradiation of the Solar EUV. / Minoru, SEKIYA; Kiyoshi, NAKAZAWA; Chushiro, HAYASHI; Department, of Physics Kyoto University; Department, of Physics Kyoto University; Department, of Physics Kyoto University.

:: Progress of Theoretical Physics, 巻 64, 番号 6, 25.12.1980, p. 1968-1985.

研究成果: ジャーナルへの寄稿記事

Minoru, SEKIYA, Kiyoshi, NAKAZAWA, Chushiro, HAYASHI, Department, OPKU, Department, OPKU & Department, OPKU 1980, 'Dissipation of the Primordial Terrestrial Atmosphere Due to irradiation of the Solar EUV', Progress of Theoretical Physics, 巻. 64, 番号 6, pp. 1968-1985. https://doi.org/10.1143/PTP.64.1968
Minoru SEKIYA, Kiyoshi NAKAZAWA, Chushiro HAYASHI, Department OPKU, Department OPKU, Department OPKU. Dissipation of the Primordial Terrestrial Atmosphere Due to irradiation of the Solar EUV. Progress of Theoretical Physics. 1980 12 25;64(6):1968-1985. https://doi.org/10.1143/PTP.64.1968
Minoru, SEKIYA ; Kiyoshi, NAKAZAWA ; Chushiro, HAYASHI ; Department, of Physics Kyoto University ; Department, of Physics Kyoto University ; Department, of Physics Kyoto University. / Dissipation of the Primordial Terrestrial Atmosphere Due to irradiation of the Solar EUV. :: Progress of Theoretical Physics. 1980 ; 巻 64, 番号 6. pp. 1968-1985.
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abstract = "The escape of a primordial Earth's atmosphere due to heating by solar radiation is studied by integrating numerically hydrodynamic equations for steady and spherically-symmetric outflow of hydrogen molecules and helium atoms. As heating sources, we take account of (1) the solar EUV radiation which is expected to be very strong during the T Tauri stage, (2) the solar visible light and (3) the release of gravitational energy of accreting planetesimals. The effect of solar wind is neglected but the condition of this neglect is estimated. The results show that the pimordial atmosphere, having existed in the early stage of the Earth's history, is dissipated within a period of 5×10^8 y, which is the upper limit imposed from the origin of the present terrestrial atmosphere, as far as the solar EUV flucx is more than 2×10^2 times as large as the present one.",
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