Radial distributions of globular clusters trace their host dark matter halo: insights from the E-MOSAICS simulations

• DOI: 10.1093/mnras/stac1126
• Publication Date: 2022-04-25T19:11:15Z
• Authors: Marta Reina-Campos; Sebastian Trujill...; Alis J Deason; J M Diederik Krui...; Joel L Pfeffer; Robert A Crain; Nate Bastian; Meghan E Hughes
• Keywords: 0103 physical sciences; 01 natural sciences; 520; QC; QB

Globular clusters (GCs) are bright objects that span a wide range of galactocentric distances, and thus probes the structure dark matter (DM) haloes. In this work, we explore whether projected radial profiles GCs can be used to infer structural properties their host DM We use simulated GC populations in sample 166 central galaxies from $(34.4~\rm cMpc)^3$ periodic volume E-MOSAICS project. find more massive stellar with shallower density radially extended. addition, metal-poor subpopulations tend have extended than metal-rich subsamples, which relate preferentially accreted origin GCs. strong correlations between slopes effective radii haloes, such as power-law slopes, scale radii, concentration parameters. Accounting for dependence on galaxy mass decreases scatter two-dimensional relations. This suggests number counts GCs, combined mass, trace profile halo galaxy. When applied extragalactic systems, recover extent haloes ETGs uncertainties smaller $0.2~\rm dex$. Thus, systems provide novel avenue beyond Local Group.