J/A+A/480/379 Abundances of 59 red giants in LMC (Pompeia+, 2008)
Chemical abundances in LMC stellar populations. I. The Inner disk sample.
Pompeia L., Hill V., Spite M., Cole A., Primas F., Romaniello M.,
Pasquini L., Cioni M.-R., Smecker-Hane T.
<Astron. Astrophys. 480, 379 (2008)>
=2008A&A...480..379P 2008A&A...480..379P
ADC_Keywords: Magellanic Clouds ; Abundances
Keywords: stars: abundances - galaxies: Magellanic Clouds -
Galaxy: abundances - galaxies: evolution
Abstract:
We have used FLAMES (the Fibre Large Array Multi Element Spectrograph)
at the VLT-UT2 telescope to obtain spectra of a large sample of red
giant stars from the inner disk of the LMC, ∼2kpc from the center of
the galaxy. We investigate the chemical abundances of key elements to
understand the star formation and evolution of the LMC disk: heavy and
light [s-process/Fe] and [alpha/Fe] give constraints on the time
scales of formation of the stellar population. Cu, Na, Sc, and the
iron-peak elements are also studied aiming to better understand the
build up of the elements of this population and the origin of these
elements. We aim to provide a more complete picture of the LMC's
evolution by compiling a large sample of field star abundances.
LTE abundances were derived using line spectrum synthesis or
equivalent width analysis. We used OSMARCS model atmospheres and an
updated line list.
Description:
Photometric data, photometric and spectroscopic stellar parameters,
radial velocities, abundance errors, atomic data, chemical abundances
of alpha-, iron-peak and s-process elements, Cu and Na, and abundance
errors are given for a sample of 59 stars.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 63 59 Photometric Data
abund.dat 168 59 Abundances ratios (tables 5-8 of the paper)
table3.dat 49 19 Errors due to stellar parameters uncertainties
table4.dat 40 120 Line List
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 -- --- [RGB]
5- 8 I4 --- RGB Reference star number
12- 27 A16 --- 2MASS 2MASS Designation
31- 36 F6.3 mag Vmag CTIO Photometry
40- 45 F6.3 mag Imag CTIO Photometry
49- 54 F6.3 mag Jmag ?=- 2MASS J Photometry
58- 63 F6.3 mag Kmag ?=- 2MASS Ks Photometry
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Byte-by-byte Description of file: abund.dat
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Bytes Format Units Label Explanations
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1- 3 A3 -- --- [RGB]
5- 8 I4 --- RGB Reference star number
10- 14 F5.2 [-] [Fe/H] Fe I abundance ratio
16- 20 F5.2 [-] e_[Fe/H] Fe I abundance error
22- 26 F5.2 [-] [Si/Fe] ?=- Si I abundance ratio
28- 31 F4.2 [-] e_[Si/Fe] ?=- Si I abundance error
33- 37 F5.2 [-] [Ca/Fe] ?=- Ca I abundance ratio
39- 42 F4.2 [-] e_[Ca/Fe] Ca I abundance error
44- 48 F5.2 [-] [TiI/Fe] Ti I abundance ratio
50- 53 F4.2 [-] e_[TiI/Fe] Ti I abundance error
55- 59 F5.2 [-] [TiII/Fe] ?=- Ti II abundance ratio
61- 64 F4.2 [-] e_[TiII/Fe] Ti II abundance error
66 A1 --- l_[O/Fe] Limit flag on [O/Fe]
67- 71 F5.2 [-] [O/Fe] ?=- [OI] abundance ratio
73- 76 F4.2 [-] [Mg/Fe] ?=- Mg I abundance ratio
78- 82 F5.2 [-] [Na/Fe] ?=- Na I abundance ratio
84- 87 F4.2 [-] e_[Na/Fe] Na I abundance error
89 A1 --- l_[Sc/Fe] Limit flag on [Sc/Fe]
90- 94 F5.2 [-] [Sc/Fe] ?=- Sc II abundance ratio
96-100 F5.2 [-] [Cu/Fe] ?=- Cu II abundance ratio
102-106 F5.2 [-] [Cr/Fe] Cr abundance ratio
108-111 F4.2 [-] e_[Cr/Fe] Cr abundance error
113-117 F5.2 [-] [Ni/Fe] ?=- Ni I abundance ratio
119-122 F4.2 [-] e_[Ni/Fe] Ni I abundance error
124-128 F5.2 [-] [V/Fe] ?=- V I abundance ratio
130-133 F4.2 [-] e_[V/Fe] ?=- V I abundance error
135 A1 --- l_[Co/Fe] Limit flag on [Co/Fe]
136-140 F5.2 [-] [Co/Fe] ?=- Co I abundance ratio
142 A1 --- l_[La/Fe] Limit flag on [La/Fe]
143-147 F5.2 [-] [La/Fe] ?=- La II abundance ratio
149-153 F5.2 [-] [Ba/Fe] ?=- Ba II abundance ratio
155 A1 --- l_[Y/Fe] Limit flag on [La/Fe]
156-160 F5.2 [-] [Y/Fe] ?=- Y I abundance ratio
163 A1 --- l_[Zr/Fe] Limit flag on [La/Fe]
164-168 F5.2 [-] [Zr/Fe] ?=- Zr I abundance error
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 A11 --- Ratio Elemental Ratio
12- 16 F5.2 --- d(Teff) Abundance change due to a change of T=+100K
20- 24 F5.2 --- d(logg) Abundance change due to a change of logg=-0.4dex
28- 32 F5.2 --- d(Vt) Abundance change due to a change of Vt=+0.2km/s
36- 40 F5.2 --- d([Fe/H]) Abundance change due to a change [Fe/H]=-0.15dex
46- 49 F4.2 --- d(tot) Total error due to stellar parameter
uncertainties
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 8 F8.3 0.1nm lambda Wavelength of the line
12- 15 A4 --- Ion Element code and ionization state
18- 22 F5.3 eV EP Lower excitation potential
29- 34 F6.3 --- loggf Logarithm of oscillator strength
40 I1 --- Ref Line data reference sources (1)
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Note (1): Gf sources as follows:
1 = NIST (http://physics.nist.gov/PhysRefData/ASD/index.html)
2 = Nave et al., 1994, Cat. J/ApJS/94/221
3 = Biemont et al., 1991A&A...249..539B 1991A&A...249..539B
4 = gf-values adjusted to provide the same solar abundances of
Grevesse & Sauval, 1998, Cat. J/A+A/437/348
adopting Holweger & Muller solar model atmosphere
5 = McWilliam & Rich, 1994ApJS...91..749M 1994ApJS...91..749M
6 = Smith et al., 2000AJ....119.1239S 2000AJ....119.1239S
7 = Sneden et al., 1996ApJ...467..819S 1996ApJ...467..819S
8 = VALD (ams.astro.univie.ac.at/vald/)
9 = Shetrone et al., 2003AJ....125..684S 2003AJ....125..684S
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Acknowledgements:
Luciana Pompeia, pompeia(at)univap.br
History:
* 07-Mar-2008: Original files
* 04-Jan-2011: In abund.dat file, [Ni/Fe] and e_[Ni/Fe] values corrected,
from author
* 02-Aug-2011: In abund.dat file, [V/Fe] and e_[V/Fe] values corrected,
from author
(End) Patricia Vannier [CDS] 08-Jan-2008