Stellar Population Models with Flexible Chemistry

Details Stellar Population Models with Flexible Chemistry Stellar Population Models with Flexible Chemistry

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aas...211.7903l&link_type=abstract

American Astronomical Society, AAS Meeting #211, #79.03; Bulletin of the American Astronomical Society, Vol. 39, p.869

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We are finishing new stellar population models with flexible chemistry, meaning that age and the abundance of 25 individual elements can be adjusted, and the spectral effects modeled. The stellar spectral effects are modeled for all mixtures, and at constant heavy-element abundance near solar, the underlying isochrone effects are also modeled with full internal consistency. Here we present preliminary results for colors, Lick indices, and spectra. We compare model results with local elliptical galaxy spectra for basic trends with velocity dispersion, confirming the previously known positive correlations with CN, Na, and Mg, but we are unable to unambiguously disentangle C, N, and O abundances with the present data and models.

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