High-redshift JWST massive galaxies and the initial clustering of supermassive primordial black holes

TL;DR

This paper proposes that the initial clustering of supermassive primordial black holes can significantly boost the matter power spectrum, potentially explaining the high-redshift massive galaxies observed by JWST.

Contribution

It introduces a model where clustered supermassive primordial black holes influence structure formation, offering a novel explanation for early massive galaxy observations.

Findings

Clustered SMPBHs enhance the matter power spectrum.

The model aligns with JWST's high-redshift galaxy data.

SMPBHs with mass ~10^9 M_sun and fraction ~10^{-3} are consistent with constraints.

Abstract

In this paper, we show that the initial clustering of supermassive primordial black holes (SMPBHs) beyond a Poisson distribution can efficiently enhance the matter power spectrum, and thus the halo mass function. As a result, the population of initially clustered SMPBHs with $M_{\rm PBH}\sim 10^9M_\odot$ and the fraction of energy density $f_{\rm PBH}\sim 10^{-3}$ (consistent with current constraints on SMPBHs) has the potential to naturally explain high-redshift massive galaxies observed by the James Webb Space Telescope.