Protostar Formation in the Early Universe
Protostar Formation in the Early Universe
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DOI：
10.1017/s1743921308024538
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发表时间：
2008-06
期刊：
影响因子：
56.9
通讯作者：
N. Yoshida;K. Omukai;L. Hernquist
中科院分区：
文献类型：
--
作者：
N. Yoshida;K. Omukai;L. Hernquist
宇宙中第一代恒星的性质在很大程度上仍然未知。观测结果表明，在宇宙历史的早期存在着大质量的原始恒星，而宇宙结构增长的标准理论预测，结构通过引力不稳定性分层增长。我们已经开发了一个从头算计算机模拟的原始恒星的形成，遵循相关的原子和分子的过程中的原始气体在一个不断膨胀的宇宙。结果表明，大爆炸遗留下来的原始密度波动可以驱动一颗质量为太阳1%的微小原恒星的形成。原始星星是随后形成大质量原始星星的种子。
The nature of the first generation of stars in the universe remains largely unknown. Observations imply the existence of massive primordial stars early in the history of the universe, and the standard theory for the growth of cosmic structure predicts that structures grow hierarchically through gravitational instability. We have developed an ab initio computer simulation of the formation of primordial stars that follows the relevant atomic and molecular processes in a primordial gas in an expanding universe. The results show that primeval density fluctuations left over from the Big Bang can drive the formation of a tiny protostar with a mass 1% that of the Sun. The protostar is a seed for the subsequent formation of a massive primordial star.