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Horizontal branch morphology in galactic globular clusters: dense environment is "a" second parameter
R. Buonanno, C. Corsi, M. Bellazzini +2
The Horizontal Branch (HB) morphology in the color -- magnitude diagram of the Galactic globular clusters depends on many factors, and it is now firmly established that the so-call…
The stellar population of the Globular Cluster M 3. II: CCD photometry of additional 10,000 stars
F. R. Ferraro, E. Carretta, C. E. Corsi +5
We present BVI CCD photometry for more than 10,000 stars in the innermost region (0.3' < r <~ 4') of the globular cluster M 3. When added to the previous photographic photometry by…
The \mv vs \fe Calibration: I. HST Color-Magnitude Diagrams of 8 Globular Clusters in M 31
F. Fusi Pecci, R. Buonanno, C. Cacciari +6
Color Magnitude Diagrams (CMDs) of individual stars in 8 Globular Clusters in M31 down to about 1 mag fainter (V) than the Horizontal Branch have been obtained with the…
Horizontal Branch Morphology and the 2nd Parameter Problem
F. Fusi Pecci, M. Bellazzini, F. R. Ferraro +2
We review the most outstanding issues related to the study of the morphology of the Horizontal Branch (HB) in the Color-Magnitude Diagrams of Galactic Globular Clusters and its use…
The White Dwarf Distance to the Globular Cluster NGC 6752 (and its Age) with the Hubble Space Telescope (Based on observations made with the NASA/ESA Hubble Space Telescope (HST))
Alvio Renzini, Angela Bragaglia, Francesco R. Ferraro +6
Deep Hubble Space Telescope (HST) observations with WFPC2 of the nearby globular cluster NGC 6752 have allowed us to obtain accurate photometry for the cluster white dwarfs (WD). A…