Gravitational Waves from Binary Mergers of Sub-solar Mass Dark Black Holes

TL;DR

This paper investigates the potential gravitational wave signals from mergers of sub-solar mass dark black holes formed through dark matter interactions, suggesting they could be detectable by current gravitational wave observatories.

Contribution

It introduces a model for dark black hole formation via dark electromagnetism and estimates their merger rates for gravitational wave detection.

Findings

Dark black holes could be formed through dark matter interactions.

Merger rates may be high enough for detection by Advanced LIGO.

Detection of such events could provide evidence for dark matter properties.

Abstract

We explore the possible spectrum of binary mergers of sub-solar mass black holes formed out of dark matter particles interacting via a dark electromagnetism. We estimate the properties of these dark black holes by assuming that their formation process is parallel to Population-III star formation; except that dark molecular cooling can yield smaller opacity limit. We estimate the binary coalescence rates for the Advanced LIGO and Einstein telescope, and find that scenarios compatible with all current constraints could produce dark black holes at rates high enough for detection by Advanced LIGO.