Early Black Hole Formation by Accretion of Gas and Dark Matter

TL;DR

This paper presents a model where intermediate-mass black holes form in early dark matter halos through the evolution and collapse of very massive primordial stars influenced by dark matter annihilation.

Contribution

It introduces a detailed stellar evolution model incorporating dark matter annihilation leading to the formation of IMBHs in early universe dark matter halos.

Findings

Formation of 10,000 Msun stars in early dark matter halos.

Stars reach luminosities Log L/Lsun > 8.2 before collapsing.

Resulting IMBHs could seed early supermassive black holes.

Abstract

We propose a model in which intermediate-mass black holes (IMBHs) with mass of ~10000 Msun are formed in early dark matter halos. We carry out detailed stellar evolution calculations for accreting primordial stars including annihilation energy of dark matter particles. We follow the stellar core evolution consistently up to gravitational collapse. We show that very massive stars, as massive as 10000 Msun, can be formed in an early dark matter halo. Such stars are extremely bright with Log L/Lsun > 8.2. They gravitationally collapse to form IMBHs. These black holes could have seeded the formation of early super-massive blackholes.