论文标题
人口III初始质量函数如何控制第一星系的性质
How the Population III Initial Mass Function Governs the Properties of the First Galaxies
论文作者
论文摘要
人口III（POP III）恒星的特性会影响原始结构形成的许多方面，例如宇宙学的发作和早期化学富集。然而，尽管有二十年的数值模拟，并试图通过出色的考古学来限制POP III初始质量功能（IMF），但对于某些恒星的质量而言，鲜为人知。在这里，我们对POP III IMF的影响对具有ENZO的高分辨率辐射流动力学模拟的原始星系性能进行了建模。我们发现，与更常规的salpeter型IMF相比，最重的流行III IMF导致较早的星形形成，但昏暗的星系，因为大规模流行III恒星的爆炸产生的湍流更大，可以抑制高性质量的第二代恒星形成。我们的模型表明，可以从对原始星系的检测中推断出POP III IMF，这将是James Webb太空望远镜的主要目标，并且在未来十年内将是地面上极大的电信。
The properties of Population III (Pop III) stars impact many aspects of primeval structure formation such as the onset of cosmological reionization and early chemical enrichment. However, in spite of over twenty years of numerical simulations and attempts to constrain the Pop III initial mass function (IMF) by stellar archaelogy, little is known of the masses of the first stars for certain. Here, we model the effect of Pop III IMF on the properties of primeval galaxies with a suite of high-resolution radiation-hydrodynamical simulations with ENZO. We find that a top-heavy Pop III IMF results in earlier star formation but dimmer galaxies than a more conventional Salpeter-type IMF because explosions of massive Pop III stars produce more turbulence that suppresses high-mass second-generation star formation. Our models suggest that the Pop III IMF could therefore be inferred from detections of primordial galaxies, which will be principal targets of the James Webb Space Telescope and extremely large telecopes on the ground in the coming decade.
