Massive Black Holes from Dissipative Dark Matter

Abstract

We show that a subdominant component of dissipative dark matter resembling the Standard Model can form many intermediate-mass black hole seeds during the first structure formation epoch. We also observe that, in the presence of this matter sector, the black holes will grow at a much faster rate with respect to the ordinary case. These facts can explain the observed abundance of supermassive black holes feeding high-redshift quasars. The scenario will have interesting observational consequences for dark substructures and gravitational wave production.

Comments: 8 pages, 3 figures, 1 table. v2: some clarifications and references added; conclusions unchanged; version published in MNRAS