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:
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).
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 based on the evolutionary tracks computed with updated α-enhanced opacities (see Weiss et al. 2007 and Section 2 in Coelho et al. 2007).
Compressed files (tar.gz) to download
» Isochrones from Coelho et al. (2007) - 482 kB