SIMBAD references

2006ApJ...636..821F - Astrophys. J., 636, 821-841 (2006/January-2)

Abundances of Baade's Window giants from Keck HIRES spectra. I. Stellar parameters and [Fe/H] values.


Abstract (from CDS):

We present the first results of a new abundance survey of the Milky Way bulge based on Keck HIRES spectra of 27 K giants in the Baade's Window (l=1°, b=-4°) field. The spectral data used in this study are of much higher resolution and signal-to-noise ratio than previous optical studies of Galactic bulge stars. The [Fe/H] values of our stars, which range between -1.29 and +0.51, were used to recalibrate large low-resolution surveys of bulge stars. Our best value for the mean [Fe/H] of the bulge is -0.10±0.04. This mean value is similar to the mean metallicity of the local disk and indicates that there cannot be a strong metallicity gradient inside the solar circle. The metallicity distribution of stars confirms that the bulge does not suffer from the so-called G dwarf problem. This paper also details the new abundance techniques necessary to analyze very metal-rich K giants, including a new Fe line list and regions of low blanketing for continuum identification.

Abstract Copyright:

Journal keyword(s): Galaxy: Abundances - Galaxy: Bulge - Stars: Abundances

VizieR on-line data: <Available at CDS (J/ApJ/636/821): stars.dat table3.dat table4.dat table5.dat table6.dat>

Simbad objects: 50

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