A Criterion for the Validity of Parker's Model in Thermal Escape Problems for Planetary Atmospheres

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dc.contributor.author Volkov, Alexey N.
dc.date.accessioned 2018-10-12T19:55:08Z
dc.date.available 2018-10-12T19:55:08Z
dc.date.issued 2015-10-01
dc.identifier.citation Volkov, A. (2015): A Criterion for the Validity of Parker's Model in Thermal Escape Problems for Planetary Atmospheres. The Astrophysical Journal Letters, 812(1). DOI: 10.1088/2041-8205/812/1/L1 en_US
dc.identifier.uri http://ir.ua.edu/handle/123456789/4020
dc.identifier.uri http://iopscience.iop.org/article/10.1088/2041-8205/812/1/L1/meta
dc.description.abstract Mass escape rate of mon- and diatomic gases from a planetary atmosphere is studied based on Parkerʼs model for a broad range of surface conditions. The escape rate is found to follow two asymptotic regimes, namely, high- and low-density regimes, with a short intermediate regime between them. Equations for the escape rate in every asymptotic regime are found theoretically. A comparison of the obtained escape rates with results of recent kinetic simulations shows that Parkerʼs model satisfactorily predicts escape rates only in the high-density regime. Based on this finding, a criterion of applicability of Parkerʼs model for the calculation of the mass escape rate is established. en_US
dc.format.mimetype application/pdf en_US
dc.subject Kuiper belt: general en_US
dc.subject planets and satellites: atmospheres en_US
dc.title A Criterion for the Validity of Parker's Model in Thermal Escape Problems for Planetary Atmospheres en_US
dc.type text en_US


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