论文标题
不均匀的大爆炸核合成的恒星特征
Stellar Signatures of Inhomogeneous Big Bang Nucleosynthesis
论文作者
论文摘要
我们评估了在宇宙斑块中产生的丰度异常，在该宇宙的斑块中，在$η= 10^{ - 10} -10} -10^{ - 1} $的范围内，Baryon与Photon比率在局部增强了局部增强。我们的研究是由稀有茂密区域在早期宇宙中的可能生存的动机，最极端的是高于临界阈值的最极端，形成了原始的黑洞。如果发生这种情况，人们可能会期望在类似但亚阈值斑块中形成的大量早期形成恒星。我们通过以高镜头比的高值进行BBN模拟来得出一系列元素丰度特征，这些模拟在太阳能周围的任何幸存的第一代恒星中都可以检测到。我们的预测适用于金属贫困的银河光环恒星，旧的球状恒星簇和矮星系，我们与每种情况中的观察结果进行了比较。
We evaluate abundance anomalies generated in patches of the universe where the baryon-to-photon ratio was locally enhanced by possibly many orders of magnitude in the range $η= 10^{-10} - 10^{-1}$. Our study is motivated by the possible survival of rare dense regions in the early universe, the most extreme of which, above a critical threshold, collapsed to form primordial black holes. If this occurred, one may expect there to also be a significant population of early-forming stars that formed in similar but subthreshold patches. We derive a range of element abundance signatures by performing BBN simulations at high values of the baryon-to-photon ratio that may be detectable in any surviving first generation stars of around a solar mass. Our predictions apply to metal-poor galactic halo stars, to old globular star clusters and to dwarf galaxies, and we compare with observations in each of these cases.
