Sublimation and reformation of icy grains in the primitive solar nebula

Details Sublimation and reformation of icy grains in the primitive solar nebula Sublimation and reformation of icy grains in the primitive solar nebula

Dec 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991icar...94..333l&link_type=abstract

Icarus (ISSN 0019-1035), vol. 94, Dec. 1991, p. 333-344.

Other

69

Ice, Interstellar Matter, Solar Corona, Sublimation, Pluto (Planet), Shock Heating, Solar System Evolution, Triton

Scientific paper

The quantity of water ice that sublimates during the free fall of grains into the solar nebula from a surrounding interstellar cloud varies from over 90 percent of the grain mass as 30 AU from the nebular center to less than 10 percent at more than 100 AU. Virtually all the water that is sublimated ultimately recondenses, since the cold nebular gas lying beyond 10 AU is unable to hold more than a small portion as vapor. The return of most of the gas to solid phase near the nebular ambient temperature, of about 50 K, may result in at least two grain populations consisting, in one case, of unaltered interstellar grains which did not undergo sublimation, and in the other of water ice which cocondensed with more volatile gases at nebular ambient temperatures to yield volatile-rich amorphous phases.

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