标题： 再电离时期晚期第三星族恒星形成：文艺复兴模拟的结果 显示英文标题

标题： Late Pop III Star Formation During the Epoch of Reionization: Results from the Renaissance Simulations

摘要： 我们展示了来自Renaissance模拟的结果，这些模拟是在Blue Waters超级计算机上进行的极高分辨率和物理丰富的辐射传输流体动力学宇宙自适应网格细化模拟，用于研究红移7.6处第三星族恒星的形成。在约220共动Mpc$^3$的调查体积中，我们发现了14个具有近期恒星形成的第三星族星系。第三星族恒星出乎意料的晚形成是由于两个因素：(i) 金属富集过程是局部且缓慢的，使得大量原始气体存在于广阔的体积中；以及(ii) 早期星系中剧烈的金属富集恒星形成产生的强Lyman-Werner辐射抑制了质量小于$\sim$ 3 $\times$ 10$^7$ M$_\odot$的“不太小”的原始晕中的第三星族形成。我们量化了这些第三星族星系及其第三星族恒星形成环境的特性。我们寻找最近发现的明亮Ly $\alpha$发射体CR7（Sobral等，2015）的类似物，该天体被解释为位于或靠近金属富集恒星形成星系中的第三星族恒星团。我们在某些方面找到了一个与此类似的系统，然而第三星族恒星团的质量和亮度远低于CR7所推断的。 显示英文摘要

摘要： We present results on the formation of Pop III stars at redshift 7.6 from the Renaissance Simulations, a suite of extremely high-resolution and physics-rich radiation transport hydrodynamics cosmological adaptive-mesh refinement simulations of high redshift galaxy formation performed on the Blue Waters supercomputer. In a survey volume of about 220 comoving Mpc$^3$, we found 14 Pop III galaxies with recent star formation. The surprisingly late formation of Pop III stars is possible due to two factors: (i) the metal enrichment process is local and slow, leaving plenty of pristine gas to exist in the vast volume; and (ii) strong Lyman-Werner radiation from vigorous metal-enriched star formation in early galaxies suppresses Pop III formation in ("not so") small primordial halos with mass less than $\sim$ 3 $\times$ 10$^7$ M$_\odot$. We quantify the properties of these Pop III galaxies and their Pop III star formation environments. We look for analogues to the recently discovered luminous Ly $\alpha$ emitter CR7 (Sobral et al. 2015), which has been interpreted as a Pop III star cluster within or near a metal-enriched star forming galaxy. We find and discuss a system similar to this in some respects, however the Pop III star cluster is far less massive and luminous than CR7 is inferred to be.