Dust-cooling-induced fragmentation of low-metallicity clouds

Toru Tsuribe, Kazuyuki Omukai

研究成果: Article査読

62 被引用数 (Scopus)

抄録

We study the dynamical collapse and fragmentation of low-metallicity cloud cores using three-dimensional hydrodynamical calculations, and we devote particular attention to whether or not the cores fragment in the dust-cooling phase. The cores become elongated in the dust-cooling phase because they are unstable to nonspherical perturbation due to the sudden temperature decrease. In the metallicity range of 10-6 to 10-5 Z, cores with an initial axis ratio ≳2 reach a critical value of the axis ratio (≳30) and fragment into multiple small clumps. This provides a possible mechanism to produce low-mass stars in ultra-metal-poor environments.

本文言語English
ページ(範囲)L61-L64
ジャーナルAstrophysical Journal
642
1 II
DOI
出版ステータスPublished - 2006 5 1
外部発表はい

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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