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J/A+A/486/177    Bulge field stars from FLAMES-GIRAFFE spectra  (Zoccali+, 2008)

The metal content of bulge field stars from FLAMES-GIRAFFE spectra. I. Stellar parameters and iron abundances. Zoccali M., Hill V., Lecureur A., Barbuy B., Renzini A., Minniti D., Gomez A., Ortolani S. <Astron. Astrophys., 486, 177-189 (2008)> =2008A&A...486..177Z
ADC_Keywords: Stars, giant ; Stars, K-type ; Abundances Keywords: Galaxy: bulge - stars: abundances - stars: atmospheres Abstract: We determine the iron distribution function (IDF) for bulge field stars, in three different fields along the Galactic minor axis and at latitudes b=-4°, b=-6°, and b=-12°. A fourth field including NGC 6553 is also included in the discussion. About 800 bulge field K giants were observed with the GIRAFFE spectrograph of FLAMES@VLT at spectral resolution R∼20000. Several of them were observed again with UVES at R∼45000 to insure the accuracy of the measurements. The LTE abundance analysis yielded stellar parameters and iron abundances that allowed us to construct an IDF for the bulge that, for the first time, is based on high-resolution spectroscopy for each individual star. Description: Spectra for a sample of K giants in four bulge fields have been collected at the VLT-UT2 with the FLAMES-GIRAFFE spectrograph, at resolution R∼20000. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 87 521 Stellar parameters and iron abundance of all the program stars
See also: II/213 : OGLE Galactic Bulge periodic variables (Udalski+ 1996) I/244 : OGLE General Catalog of Stars. I. (Szymanski+ 1996) J/A+A/478/659 : OGLE Be stars in Galactic Bulge (Sabogal+, 2008) J/AcA/50/1 : OGLE microlensing events in Galactic Bulge (Udalski+, 2000) J/AcA/52/217 : OGLE VI photometry of Galactic Bulge (Udalski+, 2002) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1 A1 --- Fld [ABC] Field with A = Baade windows, B = Field at b=-6°, C = Field at b=-12° 3 I1 --- QF [0/2] Subjective quality factor (1) 5- 7 I3 --- ID [2/135] Identification number (not unique!) 9- 16 A8 --- OGLE OGLE identification number (2) 18- 19 I2 h RAh Right ascension (J2000) 21- 22 I2 min RAm Right ascension (J2000) 24- 28 F5.2 s RAs Right ascension (J2000) 30 A1 --- DE- Declination sign (J2000) 31- 32 I2 deg DEd Declination (J2000) 34- 35 I2 arcmin DEm Declination (J2000) 37- 41 F5.2 arcsec DEs [0/60] Declination (J2000) 43- 47 F5.2 mag Vmag V magnitude 49- 53 F5.3 mag V-I V-I colour index 55- 58 F4.2 [cm2/s] logg Surface gravity 60- 62 F3.1 km/s Vt Microturbulence velocity 64- 67 I4 K Teff Effective temperature 69- 73 F5.2 [Sun] [Fe/H] Metallicity 75- 78 F4.2 [Sun] e_[Fe/H] Line-to-line dispersion around the mean [Fe/H] 80- 87 A8 --- Cluster Cluster name
Note (1): QF is a subjective quality factor, classifying stars into good (0), bad (2) and intermediate (1), according to how unique/degenerate the convergence into the final model atmosphere proceeded. Note (2): For field A, stars identified as OGLE BUL-SC45 NNNNNN in Simbad, from Udalski et al., 2002, Cat. J/AcA/52/217
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Sep-2008
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