Тип публикации: статья из журнала
Год издания: 2016
Идентификатор DOI: 10.1093/mnras/stw935
Ключевые слова: hydrodynamics, planets and satellites: atmospheres, planets and satellites: physical evolution, ultraviolet: planetary systems
Аннотация: We investigate the loss rates of the hydrogen atmospheres of terrestrial planets with a range of masses and orbital distances by assuming a stellar extreme ultraviolet (EUV) luminosity that is 100 times stronger than that of the current Sun. We apply a 1D upper atmosphere radiation absorption and hydrodynamic escape model that takeПоказать полностьюs into account ionization, dissociation and recombination to calculate hydrogen mass-loss rates. We study the effects of the ionization, dissociation and recombination on the thermal mass-loss rates of hydrogen-dominated super-Earths and compare the results to those obtained by the energy-limited escape formula which is widely used for mass-loss evolution studies. Our results indicate that the energy-limited formula can to a great extent over- or underestimate the hydrogen mass-loss rates by amounts that depend on the stellar EUV flux and planetary parameters such as mass, size, effective temperature and EUV absorption radius.
Журнал: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Выпуск журнала: Vol. 460, Is. 2
Номера страниц: 1300-1309
ISSN журнала: 00358711
Место издания: OXFORD
Издатель: OXFORD UNIV PRESS