Bibcode
Monelli, M.; Walker, A. W.; Bono, G.; Buonanno, R.; Caputo, F.; Castellani, M.; Castellani, V.; Corsi, C. E.; Dall'Ora, M.; Marconi, M.; Pulone, L.; Ripepi, V.; Nonino, M.; Brocato, E.; Smith, H.
Referencia bibliográfica
Memorie della Società Astronomica Italiana, v.75, p.114 (2004)
Fecha de publicación:
0
2004
Número de citas
5
Número de citas referidas
4
Descripción
We present optical photometry of the Carina Dwarf Spheroidal (dSph)
Galaxy. Data have been collected with CCD mosaic cameras available at
the 2.2m ESO/MPI and at the 4m CTIO Blanco telescopes. Our current
(V,B-V) Color-Magnitude diagram (CMD) confirms the occurrence of an old
(˜ 11 Gyr) and an intermediate-age (˜ 5 Gyr ) population.
Furthermore, we found evidence of a well-defined blue plume of young
Main Sequence (MS) stars with an age at most of the order of ≃ 1
Gyr. The radial distributions of the stellar populations of different
age appear to be different: the intermediate-age population is flatter
and more centrally concentrated when compared with the old one.
Moreover, star counts of the old stellar component are asimmetric along
both the major and the minor axis. This feature might be the signature
of a tidal interaction with the Galaxy.