Damping of Terrestrial-Planet Eccentricities by Density-Wave Interactions with a Remnant Gas Disk

Details Damping of Terrestrial-Planet Eccentricities by Density-Wave Interactions with a Remnant Gas Disk Damping of Terrestrial-Planet Eccentricities by Density-Wave Interactions with a Remnant Gas Disk

Mar 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002apj...567..579a&link_type=abstract

The Astrophysical Journal, Volume 567, Issue 1, pp. 579-586.

Astronomy and Astrophysics

Astronomy

40

Accretion, Accretion Disks, Celestial Mechanics, Stars: Planetary Systems, Solar System: Formation

Scientific paper

We examine the damping of terrestrial-planet eccentricities via density-wave interactions with a remnant gas disk that postdated the accretionary epoch. A lower limit is estimated for the gas surface density present in the terrestrial zone required for acoustic damping to be effective, and a simple model for describing the disk's influence on the planet eccentricities is presented. The results suggest that the terrestrial-planet eccentricities could be reduced from values permitting crossing orbits to the present-day values by a remnant disk with gas surface density of ~10-3-10-4 times the minimum-mass solar nebula value and characteristic gas dissipation timescales of 106-107 yr.

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