Access to Astronomical Catalogues

← Click to display the menu
J/A+A/525/A71   Atmospheric parameters for 1273 stars            (Wu+, 2011)

Coude-feed stellar spectral library - atmospheric parameters. Wu Y., Singh H.P., Prugniel P., Gupta R., Koleva M. <Astron. Astrophys. 525, A71 (2011)> =2011A&A...525A..71W
ADC_Keywords: Stars, atmospheres ; Atlases ; Effective temperatures ; Abundances, [Fe/H] Keywords: stars: fundamental parameters - galaxies: stellar content Abstract: Empirical libraries of stellar spectra play an important role in different fields. For example, they are used as reference for the automatic determination of atmospheric parameters, or for building synthetic stellar populations to study galaxies. The CFLIB (Coude-feed library, Indo-US) database is at present one of the most complete libraries, in terms of its coverage of the atmospheric parameters space (Teff, logg and [Fe/H]) and wavelength coverage 3460-9464Å at a resolution of ∼1Å FWHM. Although the atmospheric parameters of most of the stars were determined from detailed analyses of high-resolution spectra, for nearly 300 of the 1273 stars of the library at least one of the three parameters is missing. For the others, the measurements, compiled from the literature, are inhomogeneous. In this paper, we re-determine the atmospheric parameters, directly using the CFLIB spectra, and compare them to the previous studies. Methods. We use the ULySS program to derive the atmospheric parameters, using the ELODIE library as a reference. Based on comparisons with several previous studies we conclude that our determinations are unbiased. For the 958 F,G, and K type stars the precision on Teff, logg, and [Fe/H] is respectively 43K, 0.13dex and 0.05dex. For the 53 M stars they are 82K, 0.22dex and 0.28dex. And for the 260 OBA type stars the relative precision on Teff is 5.1%, and on logg, and [Fe/H] the precision is respectively 0.19 dex and 0.16 dex. These parameters will be used to re-calibrate the CFLIB fluxes and to produce synthetic spectra of stellar populations. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 66 1273 Physical parameters adopted by this work table3a.dat 70 79 ULySS and adopted parameters for 79 stars table3b.dat 80 228 Outliers found in the comparisons for 79 stars
See also: III/251 : ELODIE library V3.1 (Prugniel+ 2007) J/ApJS/152/251 : Indo-US Library of Coude Feed Stellar Spectra (Valdes+, 2004) http://www.noao.edu/cflib : Indo-US library of coude feed stellar spectra http://ulyss.univ-lyon1.fr/ : ULySS software package home page http://www.obs.u-bordeaux1.fr/m2a/soubiran/elodie_library.html : ELODIE home page Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Stellar identification 13- 24 A12 --- SpType MK Spectral type 27- 31 I5 K Teff ? Effective temperature 34- 37 I4 K e_Teff ? Error of effective temperature (1) 40- 43 F4.2 [cm/s2] log(g) ? Log of the surface gravity 46- 49 F4.2 [cm/s2] e_log(g) ? Error of the log of the surface gravity (1) 52- 56 F5.2 [Sun] [Fe/H] ? Metallicity 59- 62 F4.2 [Sun] e_[Fe/H] ? Error of metallicity (1) 65- 66 A2 --- r_[Fe/H] Indicate the origin of adopted parameters (G1)
Note (1): The internal errors are given only when Flag = 0 or 1.
Byte-by-byte Description of file: table3a.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Stellar identification 11- 15 I5 K TeffU ULySS fitted effective temperature 18- 21 I4 K e_TeffU Internal error given by ULySS 24- 27 F4.2 [cm/s2] log(g)U ULySS fitted log of the surface gravity 30- 33 F4.2 [cm/s2] e_log(g)U Internal error given by ULySS 36- 40 F5.2 [Sun] [Fe/H]U ULyss fitted metallicity 43- 46 F4.2 [Sun] e_[Fe/H]U Internal error given by ULySS 49- 53 I5 K Teff Adopted effective temperature 56- 59 F4.2 [cm/s2] log(g) Adopted log of the surface gravity 62- 66 F5.2 [Sun] [Fe/H] Adopted metallicity 69- 70 A2 --- r_[Fe/H] Indicate the origin of adopted parameters (G1)
Byte-by-byte Description of file: table3b.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name Stellar identification 12- 16 I5 K Teff ? Effective temperature from reference 19- 22 F4.2 [cm/s2] log(g) ? Log of the surface gravity from reference 25- 29 F5.2 [Sun] [Fe/H] ? Metallicity from reference 32- 80 A49 --- r_[Fe/H] Reference source (1)
Note (1): Codes for reference as: ELODIE_I = ELODIE internal determinations fit_ELO = means ULySS fit of an ELODIE spectrum fit_3900 = means fit of the CFLIB spectrum starting from 3900Å instead of 4400Å fix log(g) = fixed log(g)
Global notes: Note (G1): Flag indicates the origin of the adopted parameters as follows: 0 = standard fit of the CFLIB spectrum 1 = fit of the CFLIB spectrum starting from 3900Å 2 = value from literature 2m = mean value from the literature, see details in the text 3 = ULySS fit of an ELODIE spectrum 4 = improved fit, see details in the text
Acknowledgements: Yue Wu, wmoon211(at)gmail.com References: Koleva et al., 2009A&A...501.1269K, ULySS: a full spectrum fitting package
(End) Yue Wu [NAOC, China], Patricia Vannier [CDS] 18-Nov-2010
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