arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2103.15957astro-ph.CO
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$α$ -吸引子模型中原初黑洞的形成:优化峰理论分析

Primordial black hole formation in $α$-attractor models: an analysis using optimized peaks theory

Rafid Mahbub

摘要:

利用膨胀$α$ -吸引子重新研究了原初黑洞的形成.代替使用传统的Press-Schechter理论来计算丰度,使用优化峰理论,其在参考文献\cite{Yoo:2018kvb,Yoo:2020dkz}中发展。这种方法考虑了曲率扰动在改变原始黑洞质量中的作用。分析\cite{Mahbub:2019uhl}中提出的模型可以看出,与通常的计算相比,坍缩的哈勃补丁的视界质量大了$\mathcal{O}(10)$。此外,PBH可以形成曲率功率谱,$\mathcal{P}_ζ(k)$,峰值在较低的值使用数值上有利的阈值过密度。由于预测的质量通常较大,功率谱的峰值可以放置在比典型模式更大的$k$模式处,从而可以避免通过引力波(GW)对原始功率谱的潜在未来约束。

英文摘要:

In this paper, the formation of primordial black holes (PBHs) is reinvestigated using inflationary $α$-attractors. Instead of using the conventional Press-Schechter theory to compute the abundance, the optimized peaks theory is used, which was developed in Ref. \cite{Yoo:2018kvb,Yoo:2020dkz}. This method takes into account how curvature perturbations play a rôle in modifying the mass of primordial black holes. Analyzing the model proposed in \cite{Mahbub:2019uhl} it is seen that the horizon mass of the collapsed Hubble patch is larger by $\mathcal{O}(10)$ compared to the usual computation. Moreover, PBHs can be formed from curvature power spectrum, $\mathcal{P}_ζ(k)$, peaked at lower values using numerically favored threshold overdensities. As a result of the generally larger masses predicted, the peak of the power spectrum can be placed at larger $k$ modes than that is typical with which potential future constraints on the primordial power spectrum through gravitational waves (GWs) can be evaded.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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