# Using MUSE-AO observations to constrain the formation of the large nuclear star cluster in FCC47

## TL;DR

This study uses MUSE-AO observations of FCC47's large nuclear star cluster to investigate its formation, aiming to distinguish between in-situ formation and globular cluster merging scenarios.

## Contribution

The paper presents detailed analysis of FCC47's NSC using high-resolution MUSE-AO data, providing new insights into its stellar populations and formation mechanisms.

## Key findings

- Characterization of stellar populations in FCC47's NSC.
- Constraints on NSC formation scenarios based on angular momentum and stellar properties.
- Identification of the NSC's structural and kinematic features.

## Abstract

Nuclear star clusters (NSCs) are found in at least 70% of all galaxies, but their formation path is still unclear. In the most common scenarios, NSCs form in-situ from the galaxy's central gas reservoir, through merging of globular clusters (GCs), or through a combination of the two. As the scenarios pose different expectations for angular momentum and stellar population properties of the NSC in comparison to the host galaxy and the GC system, it is necessary to characterise the stellar light, NSC, and GCs simultaneously. Wide-field observations with modern integral field units such as the Multi Unit Spectroscopic Explorer (MUSE) allow to perform such studies. However, at large distances, NSCs usually are not resolved in MUSE observations. The particularly large NSC (R_eff $\sim$ 66 pc) of the early-type galaxy FCC47 at distance of $\sim$ 20 Mpc is an exception and is therefore an ideal laboratory to constrain NSC formation of external galaxies.