Population III star explosions and Planck 2018 data
Population III star explosions and Planck 2018 data
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DOI：
10.1103/physrevd.103.123543
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发表时间：
2021-03
影响因子：
5
通讯作者：
K. Abe;H. Tashiro
中科院分区：
文献类型：
--
作者：
K. Abe;H. Tashiro
利用最新的普朗克数据研究了第三星族星超新星爆发对高红移再电离历史的影响。据预测，大质量的Pop III星（130 M ≤ M ≤ 270 M）在其恒星生命结束时会以对不稳定性超新星（PISNe）的形式爆炸。在爆炸过程中，超新星遗迹以热电离泡的形式生长，并在再电离历史的早期阶段增强了电离分数。这种增强影响了宇宙微波背景（CMB）的光学深度，并在大尺度上产生了额外的CMB偏振各向异性。因此，分析普朗克偏振数据使我们能够检查Pop III星星SNe及其祖先，大质量Pop III恒星的丰度。为了模拟SN的贡献，再电离，我们引入了一个新的参数，它涉及到的SNe的宇宙的坍缩分数的丰度。使用马尔可夫链蒙特卡罗方法与最新的普朗克极化数据，我们得到了我们的模型参数，ε的约束。我们的约束告诉我们，所观察到的CMB偏振与PISNe的丰度是一致的预测从星星的形成率和初始质量函数的Pop III星在最近的宇宙学模拟。我们还建议，结合进一步的观察，如高红移准恒星物体（QSO）的观测，可以提供更严格的约束和重要的信息的性质的Pop III星的再电离历史。
We investigate the effect of the population III (Pop III) stars supernova explosion (SN) on the high redshifts reionization history using the latest Planck data. It is predicted that massive Pop III stars (130M ≤ M ≤ 270M ) explode energetically at the end of their stellar life as pair-instability supernovae (PISNe). In the explosion, supernova remnants grow as hot ionized bubbles and enhance the ionization fraction in the early stage of the reionization history. This enhancement affects the optical depth of the cosmic microwave background (CMB) and generates the additional anisotropy of the CMB polarization on large scales. Therefore, analyzing the Planck polarization data allows us to examine the Pop III star SNe and the abundance of their progenitors, massive Pop III stars. In order to model the SN contribution to reionization, we introduce a new parameter ζ, which relates to the abundance of the SNe to the collapse fraction of the Universe. Using the Markov chain Monte Carlo method with the latest Planck polarization data, we obtain the constraint on our model parameter, ζ. Our constraint tells us that observed CMB polarization is consistent with the abundance of PISNe predicted from the star formation rate and initial mass function of Pop III stars in recent cosmological simulations. We also suggest that combining further observations on the late reionization history such as high redshift quasi-stellar object (QSO) observations can provide tighter constraints and important information on the nature of Pop III stars.