What Could be the Observational Signature of Dark Matter in Globular Clusters?

TL;DR

This paper explores the potential observational signatures of dark matter and intermediate mass black holes in globular clusters, aiming to understand their formation and the implications for dark matter detection.

Contribution

It investigates the coexistence of dark matter and intermediate mass black holes in globular clusters and analyzes their potential signals for dark matter detection.

Findings

Dark matter density profiles in GCs are uncertain and crucial for detection efforts.

The presence of IMBHs could influence dark matter distribution and observational signatures.

Potential gamma-ray and radio signals from dark matter annihilation in GCs are discussed.

Abstract

Here we investigate the possibility that some globular clusters (GCs) harbor intermediate mass black holes (BH) in their centers and are also embedded in a low-mass dark matter (DM) halo. Up to date, there is no evidence on whether or not GCs have DM in their constitution. For standard cold DM cosmology, it is expected that GCs form with their own DM halos. Other studies investigate the possibility that GCs were initially embedded in massive DM halos that evolved during the cluster lifetime. An additional intriguing question is related to the existence of intermediate mass black holes (IMBH) in the of GCs. The determination of whether GCs hold IMBHs would be able to answer important questions about GCs formation and the circumstances that gave rise to the IMBHs. DM & IMBH in the context of GCs are interesting subjects to be studied and we will perform such studies here, assuming the coexistence of both of them in some GCs. Having such information, we perform the study possible DM signals from GCs. One important subject to be studied is the DM density profile. In the inner regions of GCs, the DM density profile is still an open question of fundamental importance to DM studies, specially for the study of radio and $\gamma$-ray emission from DM annihilation in such regions (abridged).