90 citations · 91 across the 9 of their papers we have counts for
4 papers · 1 filter
On the radial distribution of white dwarfs in the Galactic globular cluster Omega Cen
A. Calamida, C. E. Corsi, G. Bono +14
We present deep and accurate photometry (F435W, F625W, F658N) of the Galactic Globular Cluster Omega Cen collected with the Advanced Camera for Surveys (ACS) on board the Hubble Sp…
Stroemgren metallicity calibration: the m1, b-y relation
A. Calamida, G. Bono, P. B. Stetson +15
We performed a new calibration of the Stroemgren metallicity index m1 based on the b-y color of cluster red giant stars. The current Metallicity-Index-Color relation is not linear…
Probing the Faintest Stars in a Globular Star Cluster
Harvey B. Richer, Jay Anderson, James Brewer +10
NGC 6397 is the second closest globular star cluster to the Sun. Using 5 days of time on the Hubble Space Telescope, we have constructed the deepest ever color-magnitude diagram fo…
Short-Period Variables in the Local Group Dwarf Galaxies Tucana and LGS3
E. J. Bernard, M. Monelli, C. Gallart +16
We present preliminary results concerning the search for short-period variable stars in Tucana and LGS3 based on very deep HST/ACS imaging. In the fraction of the observed field we…