Numerical simulation of dust aggregate collisions. II. compression and disruption of three-dimensional aggregates in head-on collisions

Kon Wada, Hidekazu Tanaka, Toru Suyama, Hiroshi Kimura, Tetsuo Yamamoto

研究成果: Article査読

120 被引用数 (Scopus)

抄録

We study collisions between dust aggregates to construct a model of their structural evolution in protoplanetary disks. We carry out three-dimensional simulations of aggregate collisions and examine their compression and disruption processes following our previous two-dimensional simulations. We take clusters of ballistic cluster-cluster aggregation (BCCA) formed by a hit-and-stick process as initial structures and study their head-on collisions with the use of realistic binding forces. Our numerical results indicate that the energy criteria for compression and disruption of BCCA clusters are consistent with previous two-dimensional simulations. For aggregate compression at a collision, we succeed in obtaining a scaling law in which the gyration radius of the resultant aggregate is proportional to Eimp-0.10, where Eimp is the impact energy. Furthermore, we derive an "equation of state" of aggregates which reproduces the scaling law for compression. The equation of state is useful for describing the density evolution of dust aggregates during their growth.

本文言語English
ページ(範囲)1296-1308
ページ数13
ジャーナルAstrophysical Journal
677
2
DOI
出版ステータスPublished - 2008 4 20
外部発表はい

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学

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