Abstract
In this letter, we present preliminary results of the analysis of Flamingos-2 and GMOS-S photometry of the globular cluster (GC) system of the elliptical galaxy NGC 1395. This is the first step of a long-term Brazilian–Argentinian collaboration for the study of GC systems in early-type galaxies. In the context of this collaboration, we obtained deep NIR photometric data in two different bands (J and K s), which were later combined with high quality optical Gemini + GMOS photometry previously obtained by the Argentinian team. This allowed us to obtain different color indices, less sensitive to the effect of horizontal branch (HB) stars for several hundreds of GC candidates, and to make an initial assessment of the presence or absence of multiple GC populations in colors in NGC 1395.
Highlights
Globular clusters (GCs) are powerful probes to study the evolutionary histories of galaxies, as they are good tracers of galactic star forming episodes
The study of NGC 3115 by [15], suggests that if the underlying metallicity bimodality is real, it should be detected in all colors as well as in metal-sensitive indices
In the framework of our BAGGs GCs collaboration, we are involved in obtaining deep optical and NIR multi-band photometry, as well as deep MOS spectroscopy, of GC systems belonging to massive early-type galaxies
Summary
Globular clusters (GCs) are powerful probes to study the evolutionary histories of galaxies, as they are good tracers of galactic star forming episodes. In the [12] scenario, the morphology of the horizontal branch (HB) produces a “wavy” pattern in the C–M relation in such a way that it is possible to obtain a bimodal color distribution from a unimodal metallicity distribution. The combination of optical and NIR colors is expected to help to mitigate the
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