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The POLLUX Database of Stellar Spectra

Welcome to the POLLUX Website !

POLLUX is a stellar spectra database proposing access to theoretical data. High resolution synthetic spectra and spectral energy distributions have been computed using the best available models of atmosphere (CMFGEN, ATLAS and MARCS), performant spectral synthesis codes (CMF_FLUX,SYNSPEC and TURBOSPECTRUM) and atomic linelists from VALD database and specific molecular linelists for cool stars. Spectral types from O to M are represented for a large set of parameters : Teff, log g, [Fe/H], specific abundances.

New release announced: new spectra (Chiavassa, Casagrande, Collet et al., A&A, in press, arXiv:1801.01895) will be available soon (1st quarter of 2018). These spectra have been computed from 3D simulations (Magic et al. 2013, A&A, 557, A26) using the radiative transfer code Optim3D (Chiavassa et al. 2009, A&A, 506, 1351). In the meantime, please contact directly A. Chiavassa ( to obtain the 3D spectra


 When using POLLUX data for scientific publication, please quote the reference
Palacios A., Gebran M., Josselin E., Martins F., Plez B.,
Belmas M., Sanguillon M., Lèbre A.,
2010, A&A 516, A13
and mention the following sentence:
This research was achieved using the POLLUX database
( )
operated at LUPM (Université Montpellier - CNRS, France
with the support of the PNPS and INSU.