The Carina Project: bright variables

Dall'Ora, M.; Ripepi, V.; Caputo, F.; Castellani, V.; Bono, G.; Brocato, E.; Buonanno, R.; Castellani, M.; Corsi, C. E.; Marconi, M.; Monelli, M.; Nonino, M.; Pulone, L.; Smith, H. A.; Walker, A. R.
Referencia bibliográfica

Memorie della Società Astronomica Italiana, v.74, p.894 (2003)

Fecha de publicación:
0
2003
Número de autores
15
Número de autores del IAC
0
Número de citas
0
Número de citas referidas
0
Descripción
We present recent results on variable stars in the Carina Dwarf Galaxy based on B,V time series data collected over three consecutive nights with the Wide Field Imager available at the 2.2m ESO/MPI telescope. At present we have already detected and measured a sample of 92 variable stars. Among them 75 are RR Lyrae stars (54 fundamental, 15 first overtone, and 6 suspected double-mode pulsators), while 15 are Anomalous Cepheids. By adopting recent theoretical predictions we discuss evolutionary and pulsation properties of these objects. Finally, we estimate the Carina distance according to three different methods that use RR Lyrae stars as distance indicators. Based on Osservatorio di Capodimonte guaranteed time.