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The mass function of M4 from near IR and optical HST observations
L. Pulone, G. De Marchi, F. Paresce
Deep images of the galactic globular cluster M4 taken at various locations with the NIC3 and the WFPC2 cameras on HST were used to derive detailed local optical and near IR luminos…
A Deep Optical Luminosity Function of NGC 6712 with the VLT: Evidence for Severe Tidal Disruption
Guido De Marchi, Bruno Leibundgut, Francesco Paresce +1
The VLT on Cerro Paranal was used to observe four fields located at 2.3' from the center of the Galactic globular cluster NGC 6712 in the V and R bands. The resulting color-magnitu…
Old open clusters: the interesting case of Berkeley 21
M. Tosi, L. Pulone, G. Marconi +1
We present CCD BVI photometry of the old open cluster Berkeley 21, one of the most distant clusters in the Galactic anticentre direction, and possibly the lowest metallicity object…