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 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:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 87 521 Stellar parameters and iron abundance of all
the program stars
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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
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Bytes Format Units Label Explanations
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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 [cm/s2] 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
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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
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Sep-2008