Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
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
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: abund.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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)
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 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 6 = Smith et al., 2000AJ....119.1239S 7 = Sneden et al., 1996ApJ...467..819S 8 = VALD (ams.astro.univie.ac.at/vald/) 9 = Shetrone et al., 2003AJ....125..684S
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
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

catalogue service

© UDS/CNRS

Contact