Biology
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003mnras.343.1123c&link_type=abstract
Monthly Notice of the Royal Astronomical Society, Volume 343, Issue 4, pp. 1123-1130.
Biology
8
Astrobiology, Meteors, Meteoroids, Ism: Kinematics And Dynamics
Scientific paper
This paper follows on from earlier work presented on the dynamics of micron-sized meteoroid particles, as they are decelerated in the Earth's atmosphere at heights of 100 km or greater. Here the heating effects on these meteoroids are examined; both the intense heating during deceleration and the temperatures reached by particles settling through the atmosphere with low speeds ~cm s-1 are considered. Meteoroid deceleration by sputtering of molecules from the surface is shown to provide a mechanism by which small particles can decelerate from high entry speeds down to speeds of the order of cm s-1 while avoiding extreme heating. The question of survivability of organic material on meteoroid bodies in free space and during descent through the Earth's atmosphere is addressed.
Coulson S. G.
Wickramasinghe Chandra N.
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