论文标题
超级型Minihalos中人口III星人的宇宙学贡献
Cosmological contribution from population III stars in ultracompact minihalos
论文作者
论文摘要
在这项工作中，我们研究了使用Planck观察数据的超级合理Minihalos〜（UCMHS）对宇宙电离历史的群体〜III〜（POP。〜III）的影响。尽管尚不清楚高红移天体物理学，但UCMH可以容纳流行音乐。这样的流行恒星在主要序列中会发出电离光子，并促进高红移中的宇宙电离。为了研究它们对全球电离化的影响，我们根据``tanh''型重新离子模型对宇宙校正化的进化进行建模，该模型由$ z {\ s \ s {\ mathrm {reio}} $表示，并通过两个参数进行了两个参数，该参数以UCMHS的初始质量和UCMHS的数量来分析UCMHS的初始质量。回离模型。 $ \ MATHCAL {a}_ζ\ sillesim 10^{ - 8} $在秤中，$ k \ lyseSim 50 \ mathrm {mpc}^{ - 1} $，当我们假设标准``tandards``tanh'tanh“ tanh” tanh“ -type Reionization taby $ z = 3 $ = 3 $时， $ z _ {\ mathrm {reio}}> 3 $。
In this work, we investigate the effect of Population~III~(Pop.~III) stars in ultracompact minihalos~(UCMHs) on the cosmic ionization history using the Planck observation data. Although high-redshift astrophysics is not understood yet, UCMHs could host the Pop.~III stars like the halos formed in the standard structure formation scenario. Such Pop.~III stars would emit ionizing photons during their main sequence and facilitate cosmic reionization in high redshifts. To study their effects on the global ionization, we model the cosmic reionization evolution based on the ``tanh"-type reionization model which is expressed by $z_{\mathrm{reio}}$ with additional two parameters characterizing the initial mass of UCMHs and the number density of UCMHs. We implement the Monte Carlo Markov Chain analysis with the latest Planck observation data for our reionization model. As the result, we found that if the UCMH initial mass is larger than $10^{8.4}\mathrm{M}_{\odot}$, the number density of UCMHs is strictly limited. Then we obtained the constraint on the amplitude of the primordial power spectrum through the constraint on the UCMH number density like $\mathcal{A}_ζ\lesssim 10^{-8}$ in the scales, $k\lesssim 50\mathrm{Mpc}^{-1}$, when we assume that the standard ``tanh"-type reionization occurs by $z=3$, so that we set $z_{\mathrm{reio}}>3$.
