/ftp/cats/aliases/K/./KGB2009



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J/ApJ/705/328       Abundance measurements. I. Sculptor dSph      (Kirby+, 2009)
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	table6.dat
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Beginning of ReadMe : J/ApJ/705/328 Abundance measurements in Sculptor dSph (Kirby+, 2009) ================================================================================ Multi-element abundance measurements from medium-resolution spectra. I. The Sculptor dwarf spheroidal galaxy. Kirby E.N., Guhathakurta P., Bolte M., Sneden C., Geha M.C. <Astrophys. J., 705, 328-346 (2009)> =2009ApJ...705..328K ================================================================================ ADC_Keywords: Abundances, [Fe/H] ; Galaxies, nearby ; Photometry, CMT1T2V Keywords: galaxies: abundances - galaxies: dwarf - galaxies: individual (Sculptor dwarf) - Galaxy: evolution - Local Group Abstract: We present measurements of Fe, Mg, Si, Ca, and Ti abundances for 388 radial velocity member stars in the Sculptor dwarf spheroidal galaxy (dSph), a satellite of the Milky Way (MW). This is the largest sample of individual alpha element (Mg, Si, Ca, and Ti) abundance measurements in any single dSph. The measurements are made from Keck/Deep Imaging Multi-Object Spectrometer medium-resolution spectra (6400-9000AA, R 6500). Based on comparisons to published high-resolution (R> 20000) spectroscopic measurements, our measurements have uncertainties of alpha[Fe/H]=0.14 and alpha[alpha/Fe]=0.13. We have discovered one star with [Fe/H]=-3.80+/-0.28, which is the most metal-poor star known anywhere except the MW halo, but high-resolution spectroscopy is needed to measure this star's detailed abundances. Description: We selected targets from the Sculptor photometric catalog of Westfall et al. (2006, Cat. J/AJ/131/375). DEIMOS observations were made in 2008 Aug 3,4,31 and Sep 1.