Evolution of our galaxy and others with the high-resolution version of the code PÉGASE

Details Evolution of our galaxy and others with the high-resolution version of the code PÉGASE Evolution of our galaxy and others with the high-resolution version of the code PÉGASE

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011sf2a.conf..349r&link_type=abstract

SF2A-2011: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics Eds.: G. Alecian, K. Belkacem,

Astronomy and Astrophysics

Astrophysics

Unresolved Galaxies, Galaxy, Galaxy Nuclei, High Resolution, Metallicity, Calcium Triplet

Scientific paper

With the high performances of the Radial Velocity Spectrograph(RVS) on board of the ESA/Gaia mission, Gaia will detect nuclei and the contrasted zones of a large number of galaxies. With the resolution R ˜ 11500 and the wavelength domain of the RVS (847nm -- 874 nm) the main evolutionary parameter is the metallicity traced by the Ca triplet, Fe and Paschen lines. We propose to use the Munari et al., (2005) library with the galaxy evolution code PÉGASE, to constrain the star formation histories and to solve the degeneracy age-metallicity. High-resolution synthetic spectra might be used for educating the Support Vector Machine (SVM) allowing the automatic classification of observed targets.

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