论文标题
关于极度镜头$ z $ = 6.2 earendel源是人口〜III星的概率
On the probability of the extremely lensed $z$=6.2 Earendel source being a Population~III star
论文作者
论文摘要
最近发现，在$ z = 6.2 $的极其镜头的镜头对象是显着的，因为它很可能是一个恒星或出色的倍数，这是在宇宙历史的前十亿年内观察到的。根据其质量，这仍然不确定，但很快将受到詹姆斯·韦伯（James Webb）太空望远镜的严格限制，Earendel Star甚至可能是第一代恒星的成员，即所谓的人口〜III（POP〜III）。通过结合对第一个星系组装的详细宇宙学模拟的结果，包括原始气体和重型化学元素的富集，以及对关键恒星参数的假设，我们量化了Earendel确实具有流行〜III的可能性。我们发现，在Earendel推断出的整个质量范围内，这种概率是不可忽略的，特别是从低质量端的几个百分比到某些POP〜III III初始质量函数（IMF）模型的接近统一到允许范围的高质量端。对于将富含金属的IMF扩展到$ 500 $ \，m $ _ \ odot $的型号，Earendel的可能性是流行〜III星的可能性，达到了几至百分之十的水平。我们讨论了这种发现对整体努力进行探讨迄今难以捉摸的宇宙中的第一颗明星的含义。
The recent discovery of the extremely lensed Earendel object at $z=6.2$ is remarkable in that it is likely a single star or stellar multiple, observed within the first billion years of cosmic history. Depending on its mass, which is still uncertain but will soon be more tightly constrained with the James Webb Space Telescope, the Earendel star might even be a member of the first generation of stars, the so-called Population~III (Pop~III). By combining results from detailed cosmological simulations of the assembly of the first galaxies, including the enrichment of the pristine gas with heavy chemical elements, with assumptions on key stellar parameters, we quantify the probability that Earendel has indeed a Pop~III origin. We find that this probability is non-negligible throughout the mass range inferred for Earendel, specifically ranging from a few percent at the lower-mass end to near unity for some Pop~III initial mass function (IMF) models towards the high-mass end of the allowed range. For models that extend the metal-enriched IMF to $500$\,M$_\odot$, the likelihood of Earendel being a Pop~III star stays at the few to ten percent level. We discuss the implications of such a discovery for the overall endeavor to probe the hitherto so elusive first stars in the universe.
