Escape of the martian protoatmosphere and initial water inventory

Тип публикации: статья из журнала

Год издания: 2014

Идентификатор DOI: 10.1016/j.pss.2013.09.008

Ключевые слова: Early mars, Protoatmospheres, Atmospheric escape, Evolution, Hydrogen, Planetary surface analysis, Solidification, Upper atmosphere, Liquid sloshing, Orbits, Solar power generation, Extreme ultraviolets, Planetary atmosphere, Protoplanetary disks, Protoplanetary nebulae, Planets

Аннотация: Latest research in planet formation indicates that Mars formed within a few million years (Myr) and remained as a planetary embryo that never grew to a more massive planet. It can also be expected from dynamical models that most of Mars' building blocks consisted of material that formed in orbital locations just beyond the ice line which could have contained similar to 0.1-0.2 wt.% of H2O. By using these constraints, we estimate the nebula-captured and catastrophically outgassed volatile contents during the solidification of Mars' magma ocean and apply a hydrodynamic upper atmosphere model for the study of the soft X-ray and extreme ultraviolet (XUV) driven thermal escape of the martian protoatmosphere during the early active epoch of the young Sun. The amount of gas that has been captured from the protoplanetary disk into the planetary atmosphere is calculated by solving the hydrostatic structure equations in the protoplanetary nebula. Depending on nebular properties such as the dust grain depletion factor, planetesimal accretion rates and luminosities, hydrogen envelopes with masses >= 3 x 10(19) g to

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Выпуск журнала: Vol. 98

Номера страниц: 106-119

ISSN журнала: 00320633

Место издания: OXFORD



  • Erkaev N.V. (Siberian Federal University)
  • Kulikov Y.N. (Polar Geophysical Institute, Russian Academy of Sciences)
  • Leitzinger M. (Institute of Physics, IGAM, University of Graz)
  • Lammer H. (Space Research Institute, Austrian Academy of Sciences)
  • Odert P. (Institute of Physics, IGAM, University of Graz)
  • Kislyakova K.G. (Space Research Institute, Austrian Academy of Sciences)
  • Elkins-Tanton L.T. (Department of Terrestrial Magnetism, Carnegie Institution for Science)
  • Stokl A. (Institute for Astronomy, University of Vienna)
  • Dorfi E.A. (Institute for Astronomy, University of Vienna)
  • Gudel M. (Institute for Astronomy, University of Vienna)
  • Marcq E. (LATMOS, Universite de Versailles Saint-Quentin-en-Yvelines)

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