TWO-DIMENSIONAL TOPOLOGY OF COSMOLOGICAL REIONIZATION

TWO-DIMENSIONAL TOPOLOGY OF COSMOLOGICAL REIONIZATION
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宇宙再电离的二维拓扑

DOI:
10.1088/0004-637x/814/1/6
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发表时间:
2015-10
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Juhan Kim
Juhan Kim
中科院分区:
其他
文献类型:
--
作者:
Changbom Park;Yidong Xu;Xuelei Chen;Juhan Kim

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我们研究了两个流体动力学辐射传输模拟和两个半数值模型的21厘米差分亮温的二维拓扑结构。在每个模型中,我们计算的早期,中期和后期的再电离的二维属曲线。研究发现,在每个模型中,属曲线强烈地依赖于氢的电离分数。在不同的再电离情况下,即使电离分数相同,属曲线也有很大的不同。我们发现,二维拓扑分析方法是一个有用的工具来约束的再电离模型。我们的方法可以应用于未来的观测,如平方公里阵列。
We study the two-dimensional topology of the 21-cm differential brightness temperature for two hydrodynamic radiative transfer simulations and two semi-numerical models. In each model, we calculate the two-dimensional genus curve for the early, middle, and late epochs of reionization. It is found that the genus curve depends strongly on the ionized fraction of hydrogen in each model. The genus curves are significantly different for different reionization scenarios even when the ionized faction is the same. We find that the two-dimensional topology analysis method is a useful tool to constrain the reionization models. Our method can be applied to the future observations such as those of the Square Kilometre Array.
DOI: 10.1086/170445
发表时间: 1991-09
期刊: --
影响因子: --
作者:
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发表时间: 2013-06
影响因子: 1
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发表时间: 2007-11
期刊: The Astrophysical Journal
影响因子: --
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