Библиографическое описание:EUV-driven mass-loss of protoplanetary cores with hydrogen-dominated atmospheres: the influences of ionization and orbital distance / N. V. Erkaev [et al.]. - Текст : непосредственный // Mon. Not. Roy. Astron. Soc. - 2016. - Vol. 460, Is. 2. - P. 1300-1309. - Cited Reference Count: 69. - Гранты: The authors acknowledge the support by the FWF NFN project S11601-N16 'Pathways to Habitability: From Disks to Active Stars, Planets and Life', and the related FWF NFN subprojects, S11604-N16 'Radiation & Wind Evolution from T Tauri Phase to ZAMS and Beyond', S11606-N16 'Magnetospheric Electrodynamics of Exoplanets' and S11607-N16 'Particle/Radiative Interactions with Upper Atmospheres of Planetary Bodies Under Extreme Stellar Conditions'. HL, PO and NVE acknowledge also support from the FWF project P25256-N27 'Characterizing Stellar and Exoplanetary Environments via Modeling of Lyman-alpha Transit Observations of Hot Jupiters'. NVE acknowledges support by the RFBR grant no. 15-05-00879-a and 16-52-14006 ANF_a. Finally, the authors thank an anonymous referee for his suggestions and recommendations that help to improve this work. - Финансирующая организация: FWF NFN project [S11601-N16, S11604-N16, S11606-N16, S11607-N16]; FWF [P25256-N27]; RFBR [15-05-00879-a, 16-52-14006 ANF_a]. - AUG 1. - ISSN 0035-8711. - ISSN 1365-2966, DOI 10.1093/mnras/stw935.
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 takes 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.
