VI/120 High-resolution synthetic stellar library (Coelho+, 2005)
A library of high resolution synthetic stellar spectra from 0.3 to 1.8 µm
with solar and α-enhanced composition
Coelho P., Barbuy B., Melendez J., Schiavon R., Castilho B.
<Astron. Astrophys. 443, 735 (2005)>
=2005A&A...443..735C 2005A&A...443..735C
ADC_Keywords: Spectroscopy ; Spectra, infrared ; Models, atmosphere
Keywords: Stars: atmospheres - Stars: spectra - Stars: population synthesis
Abstract:
Libraries of stellar spectra are fundamental tools for the study of
stellar populations and both empirical and synthetic libraries have
been used for this purpose. In this paper, a new library of high
resolution synthetic spectra is presented, ranging from the
near-ultraviolet (300nm) to the near-infrared (1.8µm). The
library spans all the stellar types that are relevant to the
integrated light of old and intermediate-age stellar populations
in the involved spectral region (spectral types F through M and all
luminosity classes). The grid was computed for metallicities ranging
from [Fe/H]=-2.5 to +0.5, including both solar and α-enhanced
([α/Fe]=0.4) chemical compositions. The synthetic spectra are a
good match to observations of stars throughout the stellar parameter
space encompassed by the library and over the whole spectral region
covered by the computations.
Description:
Each star is stored in a file placed in the "sp" subdirectory, and the
name of the file indicates the atmospheric parameters of the stellar
spectrum (decimal points in gravity and abundances are omitted):
<Teff><logg><[Fe/H]><[alpha/Fe]>.txt, i.e. 575045m10p00.ms.fits
means Teff=5750K, logg=4.5, [Fe/H]=-1.0, [alpha/Fe]=+0.0
Each FITS file contains two spectra, stored as an "image" of 750901x2
points; the first "slice" represents the fluxes relative to the
continuum, and the second one the absolute fluxes in erg/cm2/s/Å
(0.01W/m2/nm).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
files.dat 108 2705 List of the FITS files with the spectra
sp/* . 2705 Spectra as FITS files (see "Description" section)
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See also:
III/232 : STELIB: A library of stellar spectra at R∼2000 (Le Borgne+, 2003)
J/PAZh/27/403 : CCD R photometry in the UMa supercluster (Kopylova+, 2001)
J/A+A/404/661 : Fe5270, Fe5335, Mgb and Mg2 synthetic indices (Barbuy+, 2003)
Byte-by-byte Description of file: files.dat
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Bytes Format Units Label Explanations
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2- 5 I4 K Teff [3500,7000] Effective temperature
8- 11 F4.2 [cm/s2] logg [0,5] Surface gravity
13- 17 F5.2 [Sun] [Fe/H] [-2.5,0.5] Metallicity [Fe/H]
20- 23 F4.2 [Sun] [a/Fe] [0,0.4] α-elements enhancement
25- 54 A30 --- FITSname *Name of FITS file, in the "sp" subdirectory
58-108 A51 --- Comment Comment associated to the data file
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Note on FITSname: see in the "Description" section above the contents
of each FITS file.
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(End) Francois Ochsenbein [CDS] 07-Nov-2005