Mechanisms for shock degassing of planetesimals

Details Mechanisms for shock degassing of planetesimals Mechanisms for shock degassing of planetesimals

Jun 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979pazh....5..251g&link_type=abstract

(Pis'ma v Astronomicheskii Zhurnal, vol. 5, May 1979, p. 251-256.) Soviet Astronomy Letters, vol. 5, May-June 1979, p. 133-136.

Astronomy and Astrophysics

Astronomy

4

Degassing, Planetary Evolution, Projectile Cratering, Protoplanets, Shock Loads, Terrestrial Planets, Diffusion Coefficient, Planetology, Shock Wave Interaction, Terminal Velocity

Scientific paper

When the surface of a growing planet is struck by a planetesimal at a velocity above 6 km/sec, an appreciable amount of the gases it contained would be liberated. The principal degassing mechanisms include vaporization of solid material, sputtering of fused droplets, and degassing of the fusion 'lens' on the crater floor. Quantitative estimates of the shock degassing are obtained for impact velocities of 5-12 km/sec.

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