On the kinematic structure of the Carina dwarf spheroidal galaxy

We present a semi-automatic interactive code, ROma Stellar Spectroscopic Analyzer (ROSSA), to measure radial velocities (RVs) from stellar spectra, covering a broad range of spectral resolutions. The measurement is supported by a graphical interface to change the fitting function (Gaussian or Moffat) and their parameters such as, e.g., symmetry and wings contribution. ROSSA has been applied to the kinematical structure of the Carina dwarf spheroidal galaxy, in order to obtain homogeneous RV measurements of ∼1 400 stars collected with various VLT spectrographs (FORS2, FLAMES/GIRAFFE medium- and high-resolution grisms). The spectroscopic targets cover different evolutionary phases and stellar populations of Carina, from the red giant branch to phases of old (horizontal branch) and intermediate age (red clump) helium burning stars. These stars are the tracers of two different star formation episodes (2-6 and 12 Gyr).