Abstracts for fall meeting of the Japanese Society for Planetary Science
Abstracts 2007 Fall meeting of the Japanese Society for Planetary Sciences
Session ID : 340
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Host: The Japanese Society for Planetary Sciences: Local Organizing Committee for 2007 Fall Meeting

Oral Session 13: Gas Planets and Planetary Atmosphere
Sep. 27, 17:10-18:49
Impact origin of Titan's N2 atmosphere: reexamination
*Ryo Ishimaru, Yasuhito Sekine, Takafumi Matsui
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Abstract
Previous studies proposed that the Titan's N2 atmosphere is produced by the pyrolysis of NH3 by impact shock heating. However, results of our numerical model found that N2 atmosphere cannot be formed by the impact in the CH4-NH3 atmosphere which previous studies treated. Thus this study conducts numerical simulations for various impact conditions, such as atmospheric composition and impact velocity, and reconsiders conditions in which the N2 atmosphere is formed by impacts.
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© 2007 The Japanese Society for Planetary Sciences
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