Wide field photometry of the M104 globular cluster system

Abstract

We present preliminary results of a wide field study of the globular cluster system of NGC4594, the Sombrero galaxy. The galaxy was observed in B, V, and R using the Wide Field Imager on the ESO 2.2m telescope. Using color and shape criteria to select a sample of highly probable globular cluster candidates, we measured the radial density profile of clusters out to 40' (100 Kpc) in the galaxy halo. The colors are consistent with the bimodal color distribution observed in previous studies. The red cluster candidates show a clear central concentration relative to the blue clusters. The population of red clusters does not appear significantly flattened, thus indicating that they are associated to the galaxy bulge rather than to the disk.