MOCCA-SURVEY Database I. Unravelling black hole subsystems in globular clusters

Understand

In this paper, we discuss how globular clusters (GCs) structural and observational properties can be used to infer the presence of a black hole system (BHS) inhabiting their inner regions.

• We propose a novel way to identify the BHS size, defined as the GC radius containing a mass contributed equally from stars and stellar BHs.
• Using this definition, similar to the well-known concept of "influence radius", we found a "fundamental plane" connecting the BHS typical density with the GC central surface density profile, total luminosity and observational half-mass radius.
• Our approach allows us to define a unique way to connect the observational GCs parameters with their dark content.