The hydrodynamic escape from Titan's H2 proto-atmosphere

DOI
  • Nakagami Yuuichi
    Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University
  • Kuramoto Kiyoshi
    Division of Earth and Planetary Sciences, Graduate School of Science, Hokkaido University

Bibliographic Information

Other Title
  • 原始タイタン H2 大気の流体力学的散逸

Description

It is likely that proto-Titan accumulated hydrogen molecules from the Saturnian subnebnula and kept a proto-atmosphere with surface pressure of several hundred bars. Once the subnebula began to dissipate, this proto-atmosphere should have escaped as the pressure of the astmosphere decreased at the upper boundary. We have developed a numerical hydrodynamic model similar to that for solar wind, and solved the escape of the proto-atmosphere. If the density of the subnebula becomes less than that of the atmosphere with factor of 10-1, the intense escape occurs and could lose the almost all of the proto-atmosphere for several hundred years. We also argue the effects of the such vigorous escape on the composition of the unescaped atmospheric components.

Journal

Details 詳細情報について

  • CRID
    1390282680535826176
  • NII Article ID
    130004636018
  • DOI
    10.14909/jsps.2005f.0.97.0
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

Report a problem

Back to top