# Globular Cluster Seeding by Primordial Black Hole Population

## TL;DR

This paper proposes that primordial black holes formed via the modified Affleck-Dine mechanism can seed globular clusters by providing intermediate-mass black holes, aligning with observed densities and early galaxy formation needs.

## Contribution

It introduces a model linking primordial black hole populations to globular cluster formation, predicting intermediate-mass black holes in clusters without requiring dark matter halos.

## Key findings

- Predicts a population of ~1000 Mpc$^{-3}$ intermediate-mass PBHs.
- Suggests each globular cluster hosts an intermediate-mass black hole.
- Aligns PBH parameters with early galaxy formation constraints.

## Abstract

Primordial black holes (PBHs) that form in the early Universe in the modified Affleck-Dine (AD) mechanism of baryogenesis should have intrinsic log-normal mass distribution of PBHs. We show that the parameters of this distribution adjusted to provide the required spatial density of massive seeds ($\ge 10^4 M_\odot$) for early galaxy formation and not violating the dark matter density constraints, predict the existence of the population of intermediate-mass PBHs with a number density of $\sim 1000$~Mpc$^{-3}$. We argue that the population of intermediate-mass AD PBHs can also seed the formation of globular clusters in galaxies. In this scenario, each globular cluster should host an intermediate-mass black hole with a mass of a few thousand solar masses, and should not obligatorily be immersed in a massive dark matter halo.