Observations and Atmospheric Parameters of Super-Metal-rich Candidates

Abstract

The spectroscopic properties of a sample of 92 Population I bright stars (V<8) with literature values of [Fe/H]>=+0.1 are reviewed in order to study the metallicity scale at supersolar regimes. For 73 of these candidate super-metal-rich (SMR) stars we identified the photospheric fiducial parameters (T<SUB>eff</SUB>, logg, [M/H]) from among published parameter sets via a comparison of new observations in the wavelength range 5034-5398 Å with synthetic spectra derived from the 1997 database of Chavez et al. As a main issue in our analysis, we find that a ``genuine'' SMR stellar component in the Galactic disk exists with more than one-fourth of the stars in our sample fulfilling the criterion [Fe/H]>=0.2 dex, and three of them as rich as [Fe/H]>+0.4 dex. Based on observations collected at the INAOE ``G. Haro'' Observatory, Cananea (Mexico).