Strong lensing constraints on primordial black holes as a dark matter candidate

Strong lensing constraints on primordial black holes as a dark matter candidate
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作为暗物质候选者的原初黑洞受到强烈的透镜约束

DOI:
10.1093/mnras/stad1313
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发表时间:
2023
影响因子:
4.8
通讯作者:
Treu, Tommaso
Treu, Tommaso
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Dike, Veronica;Gilman, Daniel;Treu, Tommaso

文献摘要

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暗物质可能至少部分由原始黑洞(pbh)组成。为了验证这一假设,我们提出了一种从四重成像类星体的通量比中约束PBH质量(MPBH)和质量分数(fPBH)的方法。我们的方法使用近似贝叶斯计算正演建模技术直接采样mpbhandfpbh的后验分布,同时边缘化亚晕质量函数振幅、空间分布和透镜源的大小。我们将该方法应用于11个四重成像类星体,并推导出了PBH参数空间(104M⊙<MPBH< 106M⊙)中质量面积的新约束。我们得到了pbh < 0.17的上限(95%置信限)。这个约束独立于所有其他先前公布的限制。
Dark matter could comprise, at least in part, primordial black holes (PBHs). To test this hypothesis, we present an approach to constrain the PBH mass (MPBH) and mass fraction (fPBH) from the flux ratios of quadruply imaged quasars. Our approach uses an approximate Bayesian computation forward modelling technique to directly sample the posterior distribution ofMPBHandfPBH, while marginalizing over the subhalo mass function amplitude, spatial distribution, and the size of the lensed source. We apply our method to 11 quadruply imaged quasars and derive a new constraint on the intermediate-mass area of PBH parameter space 104M⊙<MPBH< 106M⊙. We obtain an upper limitfPBH< 0.17 (95 per cent confidence limit). This constraint is independent of all other previously published limits.