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J/ApJ/636/821       Abundances of Baade's Window K giants     (Fulbright+, 2006)

Abundances of Baade's Window giants from Keck HIRES spectra. I. Stellar parameters and [Fe/H] values. Fulbright J.P., McWilliam A., Rich R.M. <Astrophys. J., 636, 821-841 (2006)> =2006ApJ...636..821F (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, giant ; Spectroscopy ; Abundances, peculiar Keywords: Galaxy: abundances - Galaxy: bulge stars: abundances Abstract: 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. Description: The observations of Baade's Window stars reported here were taken with the HIRES spectrograph on the Keck I telescope between 1998 and 2001. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 88 44 Star list table3.dat 32 159 Final line list table4.dat 37 53 Line list table5.dat 52 208 Continuum regions table6.dat 38 6688 Equivalent width measurements
See also: J/AJ/89/636 : Giant M stars in Baade's Window (Blanco+, 1984) J/AJ/110/1774 : K giants in Baade's window (Terndrup+ 1995) J/AJ/112/171 : K Giants in Baade's Window. II (Sadler+ 1996) J/MNRAS/246/54 : Late-type giants in Baade's window (Sharples+ 1990) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 21 A21 --- Star Star name 22- 23 I2 h RAh ? Simbad Hour of Right Ascension (J2000.0) 25- 26 I2 min RAm ? Simbad Minute of Right Ascension (J2000.0) 28- 31 F4.1 s RAs ? Simbad Second of Right Ascension (J2000.0) 33 A1 --- DE- Simbad Sign of the Declination (J2000.0) 34- 35 I2 deg DEd ? Simbad Degree of Declination (J2000.0) 37- 38 I2 arcmin DEm ? Simbad Arcminute of Declination (J2000.0) 40- 41 I2 arcsec DEs ? Simbad Arcsecond of Declination (J2000.0) 43- 48 F6.3 mag Bmag ? Simbad B band magnitude 50- 55 F6.3 mag Vmag ? Simbad V band magnitude 57- 65 A9 --- SpType Simbad MK spectral type 68- 88 A21 --- SName Simbad name
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 7 F7.2 0.1nm lambda Wavelength in Angstroms 9- 13 A5 --- Ion Ion designation 15- 18 F4.2 eV EP Excitation potential 20- 24 F5.1 0.1pm EWaBoo ? Measured alpha Boo equivalent width (1) 26- 30 F5.1 0.1pm EWSun ? Measured solar equivalent width (1) 32 A1 --- Qual [A-E] A subjective quality assessment of the line (A the highest quality and E the lowest)
Note (1): In milli-Angstroms.
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
1- 8 F8.3 0.1nm lambda Wavelength in Angstroms 10- 13 A4 --- Ion Ion designation 15- 19 F5.3 eV EP Excitation potential 21- 26 F6.3 [-] log(gf) Log of the oscillator strength 28- 32 F5.1 0.1pm EW Measured solar equivalent width (1) 34- 37 A4 --- Ref Reference(s) (2)
Note (1): In milli-Angstroms. Note (2): References as follows: 1 = Bard & Kock (1994A&A...282.1014B) and Bard et al. (1991A&A...248..315B) 2 = Blackwell et al. (1982MNRAS.199...43B, 1982MNRAS.201..595B, 1984A&A...132..236B, 1986MNRAS.220..549B, 1995A&A...296..217B) 3 = O'Brian et al. (1991, J. Opt. Soc. Am. B, 8, 1185)
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 8 F8.3 0.1nm lambdaS Starting wavelength in Angstroms 10- 17 F8.3 0.1nm lambdaE Ending wavelength in Angstroms 19- 24 F6.4 --- FSun Mean relative solar flux value 26- 31 F6.4 --- F(aBoo) Mean relative α Boo (HR 5340) flux value 33- 38 F6.4 --- F(muLeo) Mean relative µ Leo (HR 3905) flux value 40- 45 F6.4 --- F(I-025) Mean relative Cl* NGC 6522 I-025 flux value 47- 52 F6.4 --- F(IV-003) Mean relative Cl* NGC 6522 IV-003 flux value
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 20 A20 --- Star Star name 22- 28 F7.2 --- lambda Wavelength in Angstroms 30- 34 A5 --- Ion Ion designation 36- 38 I3 0.1pm EW ? Star equivalent width for Ion (mÅ)
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 16-Jul-2008
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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