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Deep and accurate near-infrared photometry of the Galactic globular cluster omega Cen .

Prada Moroni, P. G.; Degl'Innocenti, S.; Marchetti, E. +17 more

We present deep and accurate Near-Infrared (NIR) photometry of the Galactic Globular Cluster omega Cen . Data were collected using the Multi-Conjugate Adaptive Optics Demonstrator (MAD) mounted on the VLT (ESO). We combined the NIR photometry with optical space data collected with the Advanced Camera for Surveys (ACS) for the same region of the cl…

Optical SBFs of shell galaxies.

Cantiello, M.; Brocato, E.; Raimondo, G. +1 more

We measure F814W Surface Brightness Fluctuations (SBFs) for a sample of distant shell galaxies observed with the Advanced Camera for Survey (ACS) on board of HST. To evaluate the distance at galaxies, theoretical SBF magnitudes for the ACS@HST filters are computed for single-burst stellar populations covering a wide range of ages (1.5\div 14 Gyr) …