| タイトル | Accretion rates of protoplanets. II - Gaussian distributions of planetesimal velocities |
| 著者（英） | Lissauer, Jack J.; Greenzweig, Yuval |
| 著者所属（英） | NASA Headquarters |
| 発行日 | 1992-12-01 |
| 言語 | eng |
| 内容記述 | In the present growth-rate calculations for a protoplanet that is embedded in a disk of planetesimals with triaxial Gaussian velocity dispersion and uniform surface density, the protoplanet is on a circular orbit. The accretion rate in the two-body approximation is found to be enhanced by a factor of about 3 relative to the case where all planetesimals' eccentricities and inclinations are equal to the rms values of those disk variables having locally Gaussian velocity dispersion. This accretion-rate enhancement should be incorporated by all models that assume a single random velocity for all planetesimals in lieu of a Gaussian distribution. |
| NASA分類 | LUNAR AND PLANETARY EXPLORATION |
| レポートNO | 93A22734 |
| 権利 | Copyright |
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