Globular cluster system of NGC 3613, a massive elliptical galaxy in a poor environment

BASSINO, LILIA P.; CASO, JUAN PABLO; DE BÓRTOLI, BRUNO J; ENNIS, ANA I

Bologna

Simposio; IAU Symposium 351, Star Clusters: From the Milky Way to the Early Universe; 2019

We present an analysis of the globular cluster system (GCS) of the galaxy NGC 3613, an intrinsically bright elliptical galaxy (MV = −21.5) in a low density environment (it is the central galaxy of a group of a dozen galaxies). Based on Gemini/GMOS photometry of NGC 3613 we obtained the following properties for this GCS. A ?blue tilt? is detected in the colour-magnitude diagram. The colour distribution is bimodal, presenting the two classical globular cluster (GC) sub-populations. The spatial and azimuthal projected distributions show that red sub-population correlates with the stellar component of the host galaxy.