论文标题
带有原始黑洞的加速早期大型星系形成
Accelerating early massive galaxy formation with primordial black holes
论文作者
论文摘要
JWST的最新观察结果以$ z \ gtrsim 10 $确定了几个明亮的星系候选者，其中一些看起来异常庞大（最多$ \ sim 10^{11} {11} \ \ \ rm m _ {\ odot} $）。大规模星系的这种早期形成很难与标准的$λ\ rm cdm $预测相吻合，要求非常高的恒星形成效率（SFE），甚至超过了倒塌结构中宇宙巴里元的质量预算。通过基于线性扰动理论和新闻技术形式主义的理想化分析，我们表明，如果结构形成加速/由$λ\ rm cdm $中的SFE解释，则可以用较低的SFE来解释结构形成/由大量加速/播种。 （pbhs）构成了一个小部分（$ \ sim 10^{ - 6} -10^{ - 3} $）暗物质，考虑到PBH参数的现有经验约束。我们还讨论了JWST时代PBH宇宙学的潜在观察性特征。需要做更多的工作来充分评估此类PBH模型的生存能力，以解释对高$ z $宇宙的观察。
Recent observations with JWST have identified several bright galaxy candidates at $z\gtrsim 10$, some of which appear unusually massive (up to $\sim 10^{11}\ \rm M_{\odot}$). Such early formation of massive galaxies is difficult to reconcile with standard $Λ\rm CDM$ predictions, demanding very high star formation efficiency (SFE), possibly even in excess of the cosmic baryon mass budget in collapsed structures. With an idealized analysis based on linear perturbation theory and the Press-Schechter formalism, we show that the observed massive galaxy candidates can be explained with lower SFE than required in $Λ\rm CDM$, if structure formation is accelerated/seeded by massive ($\gtrsim 10^{9}\ \rm M_{\odot}$) primordial black holes (PBHs) that make a up a small fraction ($\sim 10^{-6}-10^{-3}$) of dark matter, considering existing empirical constraints on PBH parameters. We also discuss the potential observational signatures of PBH cosmologies in the JWST era. More work needs to be done to fully evaluate the viability of such PBH models to explain observations of the high-$z$ Universe.
