Constraint on the abundance of primordial black holes in dark matter from Planck data

Constraint on the abundance of primordial black holes in dark matter from Planck data
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普朗克数据对暗物质中原初黑洞丰度的限制

DOI:
10.1088/1475-7516/2016/12/044
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发表时间:
2016-08
期刊:
JCAP
影响因子:
--
通讯作者:
Ke Wang
Ke Wang
中科院分区:
其他
文献类型:
--
作者:
Lu Chen;Qing-Guo Huang;Ke Wang

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我们利用2015年发布的普朗克数据,用两种不同的再电离模型(一种是瞬时再电离,另一种是非对称再电离)来约束暗物质中原初黑洞(PBH)的丰度,并将现有的PBH丰度上限显着提高了两个数量级左右。这些新限制意味着,在 95% 置信水平 (C.L.) 下,PBH 双星合并的事件率 (Gpc−3 yr−1) 对于 Mpbh = 30M⊙ 小于 0.002,对于 Mpbh = 10M⊙ 小于 5,对于 Mpbh = 2M⊙ 小于 2000,因此合并产生引力波事件 GW150914 的可能性很小PBH 二进制文件。
We use Planck data released in 2015 to constrain the abundance of primordial black holes (PBHs) in dark matter in two different reionization models (one is the instantaneous reionization and the other is the asymmetric reionization), and significantly improve the existing upper limits on the abundance of PBHs by around two orders of magnitude. These new limits imply that the event rates of mergers of PBH binaries (Gpc−3 yr−1) are less than 0.002 for Mpbh = 30M⊙, 5 for Mpbh = 10M⊙ and 2000 for Mpbh = 2M⊙ at 95% confidence level (C.L.), and thus the gravitational-wave event GW150914 is very unlikely produced by the merger of a PBH binary.
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