Additonal data
From Coelho et al. (2007)
Models and ingredients from Coelho et al. (2007) can be downloaded further down in this page. A brief description of the chemical mixtures and evolutionary phases considered are given below, but see the paper for a detailed explanation. A discussion on the updated α-enhanced opacities is given in Weiss et al. (2006).
Chemical composition of the models: The models are available for 6 chemical mixtures (3 solar-scaled and 3 α-enhanced). At fixed [Fe/H], we assume that in the α-enhanced model, the abundances of all classical α elements, i.e. O, Ne, Mg, Si, S, Ca and Ti, are increased by 0.4 dex relative to the scaled-solar model. The chemical composition of each mixture is given below:
Mixture
X
Y
Z
[Fe/H]
[α/Fe]
[Z/H]
m05p00
0.743
0.251
0.005
-0.5
0.0
-0.5
m05p04
0.739
0.250
0.011
-0.5
0.4
-0.2
p00p00
0.718
0.266
0.017
0.0
0.0
0.0
p00p04
0.679
0.289
0.032
0.0
0.4
0.3
p02p00
0.708
0.266
0.026
0.2
0.0
0.2
p02p04
0.642
0.310
0.048
0.2
0.4
0.5
Evolutionary phases: Three different combinations of evolutionary phases have been modelled:
The ms_agb are the preferred models for most applications. See also Section 4 in Coelho et al. (2007).
- ms_rgb : these models include only the evolutionary phases Main Sequence (MS), Sub-Giant Branch (SGB) and Red Giant Branch (RGB). In this case, the assumptions for the chemical mixtures are fully consistent among the ingredientes.
- ms_agb : models that additionally include Horizontal Branch (HB) and Assymptotic Giant Branch from Pietrinferni et al. (2004) (see BaSTI). We selected solar-scaled tracks the are closest to the total mettalicity of our mixtures.
- ms_tpagb : models that additionally include the Termally-Pulsing AGB prescription from Marigo & Girardi (2007).
Simple stellar population models
Click on your choice of models. Each tgz file contains 60 FITS files (six chemical mixtures, 10 ages). Spectra have a constant resolution of FWHM = 1 Å and a binning of 0.2 Å/pix.
Magnitudes, colours and spectral indices
Click on your choice of models to download a tgz file that contains the predictions for several indices and broad-band colours. Indices were measured in the original resolution (FWHM = 1 Å), SDSS resolution and Lick/IDS system.
Isochrones
Isochrones based on the evolutionary tracks computed with updated α-enhanced opacities (see Weiss et al. 2007 and Section 2 in Coelho et al. 2007).
Models library
Compressed files (tar.gz) to download
» Isochrones from Coelho et al. (2007) - 482 kB
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