Accretion of Dissipative Dark Matter onto Active Galactic Nuclei

TL;DR

This paper explores how dissipative dark matter accretion onto active galactic nuclei could explain the rapid growth of supermassive black holes in the early universe, aligning models with observational data.

Contribution

It introduces a novel scenario where dissipative dark matter accretion influences SMBH growth, addressing early universe SMBH formation issues.

Findings

Identifies parameter space where DDM accretion is efficient and consistent with observations.

Shows DDM accretion improves agreement between SMBH growth models and data.

Suggests DDM accretion can explain early SMBH formation without conflicting with existing constraints.

Abstract

We examine the possibility that accretion of Dissipative Dark Matter (DDM) onto Active Galactic Nuclei (AGN) contributes to the growth rate of Super Massive Black Holes (SMBHs). Such a scenario could alleviate tension associated with anomalously large SMBHs measured at very early cosmic times, as well as observations that indicate that the growth of the most massive SMBHs occurs before $z\sim6$, with little growth at later times. These observations are not readily explained within standard AGN theory. We find a range in the parameter space of DDM models where we both expect efficient accretion to occur and which is consistent with observations of a large sample of measured SMBHs. When DDM accretion is included, the predicted evolution of this sample seems to be more consistent with assumptions regarding maximal BH seed masses and maximal AGN luminosities.