CDROM/AJ/V112/P0171 K Giants in Baade's Window. II (Sadler+ 1996) ================================================================================ K Giants in Baade's Window. II. The Abundance Distribution Elaine M. Sadler, R. Michael Rich & D. M. Terndrup <1996, AJ, 112, 171> =1996AJ....112..171S ================================================================================ Abstract: This is the second in a series of papers in which we analyze spectra of over 400 K and M giants in Baade's Window, including most of the stars with proper motions measured by Spaenhauer et al. [AJ, 103, 297 (1992)]. In our first paper, we measured line-strength indices of Fe, Mg, CN, and HBeta and calibrated them on the system of Faber et al. [ApJS, 57, 711 (1985)]. Here, we use the index to derive an abundance distribution of [Fe/H] for 322 stars with effective temperatures between 3900 K and 5160 K. Our derived values of [Fe/H] agree well with those measured from high-resolution echelle spectra (e.g., McWilliam & Rich [ApJS, 91, 749 (1994)] for the small number of stars in common. We find a mean abundance <[Fe/H]> = -0.11 +/- 0.04 for our sample of Baade's Window K giants. More than half the sample lie in the range -0.4 < [Fe/H] < +0.3. We estimate line-of-sight distances for individual stars in our sample and confirm that, in Baade's Window, most K giants with V < 15.5 are foreground disk stars, but the great majority (more than 80%) with V > 16 belong to the bulge. We also compare the metallicities derived from the CN and Mg2 indices to those from iron. Most of the metal-rich stars in our sample appear to be CN-weak, in contrast to the situation in metal-rich globular clusters and ellipitcal galaxies. The metal-poor half of our sample ([Fe/H] < 0) shows evidence for a mild Mg overenhancement ([Mg/Fe] ~ +0.2); but this is not seen in the more metal-rich stars ([Fe/H] >= 0). The K giants in Baade's Window therefore share some, but not all, of the characteristics of stars in elliptical galaxies as inferred from their integrated light. File Summary: -------------------------------------------------------------------------------- File Name Lrecl Records Explanations -------------------------------------------------------------------------------- table1.dat 50 322 Measurements of [Fe/H] for Baade's Window K giants table1.tex 77 341 AASTeX version of table1.dat -------------------------------------------------------------------------------- Byte-by-byte Description of file: table1.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 1- 5 A5 --- Star Star name 6-12 F7.2 mag V V magnitude 13-18 F6.2 mag V-I V-I color 19-24 I6 K Teff Effective temperature 25-31 F7.2 --- Fe_H Metallicity, [Fe/H] 32-36 F5.2 --- e_Fe_H Error in Fe_H 37-42 F6.1 kpc R Distance 43-47 F5.1 kpc e_R Error in R 48-49 2X --- --- Blank 50 A1 --- Class *Classification -------------------------------------------------------------------------------- Notes for file: table1.dat -------------------------------------------------------------------------------- Class: Classification of the star: C = bulge clump/RGB B = bulge giant branch D = disk giant branch H = halo giant -------------------------------------------------------------------------------- ================================================================================ (End) Lee Brotzman [ADS] 09-Oct-1996