惑星集積過程のN体シミュレーション : 微惑星から惑星ヘ(<小特集>地球惑星システム)

概要

論文の詳細を見る
We survey the process of planetary accretion based on the recent results of N-body simulations. In the standard scenario of planetary formation, planets are formed through the accretion of many small bodies called "planetesimals". In the early stage of planetary accretion, larger planetesimals grow more rapidly than smaller ones, resulting "runaway growth" of the largest planetesimal. However, this runaway growth is halted when the runaway body becomes large enough to increase the velocity dispersion of planetesimals in its neighborhood and/or planetesimals in its feeding zone are depleted by accretion. In the post-runaway stage, we find that a group of protoplanets (runaway planetesimals) grows oligarchically without runaway growth among them, while most planetesimals remain small. Protoplanets are arranged at regular orbital spacings.
日本シミュレーション学会の論文
1995-12-15