A library of synthetic galaxy spectra for GAIA

Details A library of synthetic galaxy spectra for GAIA A library of synthetic galaxy spectra for GAIA

Nov 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008sf2a.conf...33r&link_type=abstract

"SF2A-2008: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: C. Charbonnel, F. Combes

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

An extended library of synthetic spectra of galaxies is built for training and testing the classification system (SVM) of GAIA. The final aim is to derive astrophysical parameters for all the unresolved galaxies observed by the satellite with the low resolution prism spectrometer. Predictions of the evolutionary code PÉGASE give the basic templates by spectral types and their corresponding astrophysical parameters (star formation rates, initial mass function, metallicity, ages and others). The new library is a largely extended sample from basic templates, tested for classification. In the future, a peculiar attention will be focused on a selection of the main astrophysical parameters. Moreover we keep in mind ambitious objectives to make coherent the interpretation of low resolution data with high resolution spectra obtained with the RVS.

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