Spectroscopy of Giants of the Sagittarius Dwarf Galaxy

Abstract

In this paper we present the first results of the analysis of intermediate resolution ($\Delta \lambda \sim 3.5\mathring{A}$) spectra of giants of the Sagittarius dwarf galaxy acquired using the ESO NTT telescope. From the deep CCD photometry of Marconi et al (1998a) we have selected a sample of giants representative of the metallicity spread suggested by the comparison of the colour-magnitude diagram of Sagittarius with those of galactic globular clusters. The spectra have been used to measure radial velocities, to confirm the membership to Sagittarius, and to provide a metallicity estimate by using spectral synthesis techniques. The analyzed stars show a spread in metallicities in the range -1.0<[Fe/H]<+0.7, some 0.5 dex more metal-rich than the photometric estimates.

To be published in the proceedings of Galaxy evolution:Connecting the distant Universe with the local fossil record. Paris, Meudon 21-25 September 1998

References in corpus (2)

• Sagittarius: The Nearest Dwarf Galaxy
• The Kinematics, Orbit, and Survival of the Sagittarius Dwarf Spheroidal Galaxy

Cited by in corpus (4)

• A 2MASS All-Sky View of the Sagittarius Dwarf Galaxy: I. Morphology of the Sagittarius Core and Tidal Arms
• The Sgr dSph hosts a metal-rich population
• Automatic abundance analysis of high resolution spectra
• A search for Interstellar absorptions towards Sgr dSph