# The globular cluster system of the isolated elliptical NGC 6411: An old system in an intermediate-age galaxy?

## TL;DR

This study analyzes the globular cluster system of the isolated elliptical galaxy NGC 6411, revealing a predominantly old system with some evidence of past intermediate-age mergers, despite indications of an intermediate-age stellar population.

## Contribution

First detailed photometric analysis of NGC 6411's globular clusters, highlighting its old system and potential past merger events in an isolated elliptical galaxy.

## Key findings

- Globular cluster system contains about 700 members.
- Color bimodality typical of old GC systems.
- Possible evidence of an intermediate-age merger event.

## Abstract

We present a photometric study of the isolated elliptical NGC 6411 and its globular cluster (GC) system, based on Gemini/GMOS g', r', i' photometry. This galaxy has been the host of a SNIa. Spectral studies indicate an intermediate-age and very metal-rich stellar population in its inner region. The extent of the globular cluster system is about 65 kpc. Its population contains $700\pm45$ members, implying a rather poor system, as normally found for isolated ellipticals. The colour bimodality and luminosity distribution are typical of old GC systems. An excess of bright GCs with intermediate colours might evidence an intermediate-age merger, but their colours indicate an older event than ages derived from spectroscopic studies of the diffuse light of the galaxy.