Globular cluster (GC) systems have now been studied in galaxies ranging from dwarfs to
giants and spanning the full Hubble sequence of morphological types. Imaging and …

Galactic globular clusters, which are ancient building blocks of our Galaxy, represent a very
interesting family of stellar systems in which some fundamental dynamical processes have …

We present spectral and photometric observations of 10 Type Ia supernovae (SNe Ia) in the
redshift range 0.16≤ z≤ 0.62. The luminosity distances of these objects are determined by …

Ages have been derived for 55 globular clusters (GCs) for which Hubble Space Telescope
Advanced Camera for Surveys photometry is publicly available. For most of them, the …

The horizontal branch (HB) morphology of globular clusters (GCs) is most strongly
influenced by metallicity. The second parameter phenomenon, first described in the 1960s …

The distribution of elements in the cosmos provides a powerful tool to study the Big Bang,
the density of baryonic matter, nucleosynthesis and the formation and evolution of stars and …

Evolution of Stars and Stellar Populations is a comprehensive presentation of the theory of
stellar evolution and its application to the study of stellar populations in galaxies. Taking a …

ABSTRACT The ACS Survey of Galactic globular clusters is a Hubble Space Telescope
Treasury program designed to provide a new large, deep, and homogeneous photometric …

We have compiled a catalog of absolute proper motions of globular clusters from various
sources. The sample consists of 38 clusters, from which most of the southern ones (15 …

The Sagittarius galaxy (Sgr), the closest satellite galaxy of the Milky Way, has survived for
many orbits about the Galaxy. Extant numerical calculations modeled this galaxy as a …