发表机构
Tsinghua University(清华大学)
机构由 AI 辅助整理,请以论文原文为准。AI 中文总结
本文提出JWST发现的小红点中超大质量黑洞可能由原初黑洞星团合并形成,推导其质量函数并解释观测特征,同时缓解高红移星系形成与ΛCDM模型的张力。
AI 中文摘要
詹姆斯·韦布空间望远镜(JWST)在“小红点”(LRDs)中发现的超大质量黑洞(SMBHs)可能源于原初黑洞(PBHs)在星团中的失控合并——通过早期宇宙小尺度上的长-短模式耦合。在此框架下,我们推导了SMBH的质量函数,以及LRDs的致密性和过度质量特征。我们还估计,PBH星团中致密气体的存在与LRD观测一致。此外,由PBH星团形成的SMBHs有助于加速高红移星系的形成,从而缓解与ΛCDM宇宙学的张力。
英文摘要
Supermassive black holes (SMBHs) in "little red dots" (LRDs) discovered by the James Webb Space Telescope (JWST) may result from runaway mergers of primordial black holes (PBHs) in clusters---through long-short mode coupling on small scales in the early Universe. In this framework, we derive the SMBH mass function, together with the compactness and overmassive features of LRDs. We also estimate that the dense gas residing in PBH clusters is consistent with LRD observations. In addition, SMBHs formed from PBH clusters can help accelerate galaxy formation at high redshifts, thus alleviating tension with $Λ$CDM cosmology.
Comments10 pages, 6 figures; minor corrections and references updated