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arXiv 1005.2237astro-ph.GA
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原始双星硬度对星团演化的影响

Effects of Hardness of Primordial Binaries on Evolution of Star Clusters

Ataru Tanikawa, Toshiyuki Fukushige

摘要:

利用N体模拟研究了原始双星硬度对星团整体演化的影响。利用新近开发的程序ESTILLA,我们模拟了11个N=16384的原始双星团,每个团的结合能在1-300kT_0范围内相等,其中1.5kT_0是初始时刻的平均恒星动能。我们发现,在软极限(< 3kT_0)和硬极限(> 300kT_0),团簇都经历了深核坍缩。在中等硬度(10-100kT_0)时,由于原始双星的能量释放,地核坍缩到一半就停止了。停止时的核心半径可以用它们的能量来解释

英文摘要:

We investigate effects of hardness of primordial binaries on whole evolution of star clusters by means of N-body simulations. Using newly developed code, GORILLA, we simulated eleven N=16384 clusters with primordial binaries whose binding energies are equal in each cluster in range of 1-300kT_0, where 1.5kT_0 is average stellar kinetic energy at the initial time. We found that, in both soft (< 3kT_0) and hard (> 300kT_0) limits, clusters experience deep core collapse. In the intermediate hardness (10-100kT_0), the core collapses halt halfway due to an energy releases of the primordial binaries. The core radii at the halt can be explained by their energy

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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