Photometric studies of the Sagittarius dwarf galaxy have suggested that a spread in metallicity (-0.7 < = [Fe/H] < = -1.6) is present, which can be interpreted as the result of different star formation bursts. We present the results from a Multi Object Slit spectroscopy program carried out at the NTT with the aim to determine spectroscopic abundances of Sagittarius giants selected from the CCD photometry of Marconi et al. (1998). From our intermediate resolution (R ∼1500 ) spectra radial velocities are determined to confirm the membership and metallicities are derived by using spectral synthesis codes for stars down to V ∼18, i.e. below the RGB clump. This work will allow us to select targets for high-resolution follow-up and detailed analysis abundances with the VLT.
The Stellar Content of Local Group Galaxies
- Pub Date:
- January 1999
- To be published in the proceedings of " The Stellar Content of Local Group Galaxies '', held in Cape Town, ed. Patricia Whitelock and Russell Cannon, ASP Conf ser. South Africa, 7-11 September 1998