Synthetic Stellar Library


The library you can download here is fully described in Coelho et al. (2005) (A&A, 443, 735; astro-ph/0505511). It consists of a synthetic stellar library computed in steps of 0.02 Angstroms, from the near-ultraviolet (300nm) to the near-infrared (1.8micron).

The grid covers the following parameters:

  • Effective temperatures: 3500 ≤ Teff ≤ 7000 K in steps of 250K
  • Surface gravities: 0.0 ≤ log g ≤ 5.0 in steps of 0.5
  • Metallicities: [Fe/H] = -2.5, -2.0, -1.5, -1.0, -0.5, 0.0, 0.2 and 0.5
  • Chemical compositions: [alpha/Fe] = 0.0 and 0.4, where the alpha-elements considered are O, Ne, Mg, Si, S, Ca and Ti. Some combinations of temperatures and gravities for the alpha-enhanced case are also available with [Ca/Fe] = 0.0.

    The library is presented in both normalized and flux calibrated formats, and each stellar spectrum is stored in a FITS file consisting of two apertures (multispec IRAF format), where aperture number 1 is the normalized spectrum and aperture number 2 is the flux-calibrated spectrum.

    The name of the file indicates the atmospheric parameters of the stellar spectrum (decimal points in gravity and abundances are omitted):

    <Teff>_<log g>_<[Fe/H]><[alpha/Fe]>.ms.fits

    The files are divided in three directories:

    Feel free to contact me: pcoelho [at] mpa-garching.mpg.de

    P. Coelho