J/A+A/513/A35 Abundances of Galactic red giants (Alves-Brito+, 2010)
Chemical similarities between Galactic bulge and local thick disk red giants:
O, Na, Mg, Al, Si, Ca and Ti.
Alves-Brito A., Melendez J., Asplund M., Ramirez I., Yong D.
<Astron. Astrophys. 513, A35 (2010)>
=2010A&A...513A..35A 2010A&A...513A..35A
ADC_Keywords: Stars, giant ; Stars, nearby ; Spectroscopy ; Equivalent widths
Keywords: stars: abundances - Galaxy: abundances - Galaxy: bulge -
Galaxy: disk - Galaxy: evolution
Abstract:
The formation and evolution of the Galactic bulge and its relationship
with the other Galactic populations is still poorly understood.
To establish the chemical differences and similarities between the
bulge and other stellar populations, we performed an elemental
abundance analysis of alpha- (O, Mg, Si, Ca, and Ti) and Z-odd (Na and
Al) elements of red giant stars in the bulge as well as of local thin
disk, thick disk and halo giants.
We use high-resolution optical spectra of 25 bulge giants in Baade's
window and 55 comparison giants (4 halo, 29 thin disk and 22 thick
disk giants) in the solar neighborhood. All stars have similar stellar
parameters but cover a broad range in metallicity (-1.5<[Fe/H]<+0.5).
A standard 1D local thermodynamic equilibrium analysis using both
Kurucz and MARCS models yielded the abundances of O, Na, Mg, Al, Si,
Ca, Ti and Fe. Our homogeneous and differential analysis of the
Galactic stellar populations ensured that systematic errors were
minimized.
Description:
Line list and equivalent widths (EWs) of a sample of 80 giant stars in
the Galactic bulge, halo, thin- and thick disk. The list includes
lines of [OI], NaI, MgI, AlI, SiI, CaI, TiI, FeI and FeII. The adopted
oscillator strengths (loggfs) and excitation potential (EP) are also
listed. For the bulge stars, the EWs were taken from Fulbrigth et al.
(2006, Cat. J/ApJ/636/821, 2007ApJ...661.1152F 2007ApJ...661.1152F). Refer to the
paper's text for more detail.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 84 80 Star list
linelist.dat 41 8954 Line list and measured equivalent widths
(tables 8-15 of the paper)
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See also:
J/ApJ/636/821 : Abundances of Baade's Window K giants (Fulbright+, 2006)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star name
11- 12 I2 h RAh ? Simbad Hour of Right Ascension (J2000.0)
14- 15 I2 min RAm ? Simbad Minute of Right Ascension (J2000.0)
17- 20 F4.1 s RAs ? Simbad Second of Right Ascension (J2000.0)
22 A1 --- DE- Simbad Sign of the Declination (J2000.0)
23- 24 I2 deg DEd ? Simbad Degree of Declination (J2000.0)
26- 27 I2 arcmin DEm ? Simbad Arcminute of Declination (J2000.0)
29- 30 I2 arcsec DEs ? Simbad Arcsecond of Declination (J2000.0)
33- 38 F6.3 mag Bmag ? Simbad B band magnitude
40- 45 F6.3 mag Vmag ? Simbad V band magnitude
47- 59 A13 --- SpType Simbad MK spectral type
61- 84 A24 --- SName Simbad name
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Byte-by-byte Description of file: linelist.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Star name
10- 13 A4 --- El Element
16- 22 F7.2 0.1nm Lambda Wavelength
24- 27 F4.2 eV EP Excitation potential
29- 35 F7.3 [-] loggf Oscillator strength
37- 41 F5.1 0.1pm EW ?=- Equivalent width
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Acknowledgements:
Alan Alves-Brito, abrito(at)astro.puc.cl
(End) Alan Alves-Brito [PUC/Chile], Patricia Vannier [CDS] 26-Jan-2010