3 papers
astro-ph2008★ 3 cited
The old metal-poor open cluster ESO 92-SC05: accreted from a dwarf galaxy?
S. ortolani, E. Bica, B. Barbuy
The study of old open clusters outside the solar circle can bring constraints on formation scenarios of the outer disk. In particular, accretion of dwarf galaxies has been proposed…
astro-ph2007★ 25 cited
Structural parameters of star clusters: relations among light, mass and star-count radial profiles and the dependence on photometric depth
Charles Bonatto, Eduardo Bica
Structural parameters of model star clusters are measured in radial profiles built from number-density, mass-density and surface-brightness distributions, assuming as well differen…
astro-ph2007★ 79 cited
Distances of the bulge globular clusters Terzan 5, Liller 1, UKS 1 and Terzan 4 based on HST NICMOS photometry
S. Ortolani, B. Barbuy, E. Bica +2
A large number of pulsars and X-rays sources are detected in globular clusters. To understand the structure and content of these clusters, accurate distances are required. We deriv…