Statistics – Computation
Scientific paper
Jun 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989mnras.238..925s&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 238, June 1, 1989, p. 925-934.
Statistics
Computation
16
Computational Astrophysics, Galactic Nuclei, Optimization, Star Clusters, Astronomical Spectroscopy, Metallicity
Scientific paper
A multiple minimization procedure is applied to the problem of the population synthesis of galactic nuclei. Star cluster spectral features are determined as a function of age and metallicity. The population synthesis problem is transformed into a series of optimization problems, each one corresponding to a fixed contribution of an individual basis component, and the formulation allows the degeneracy degree of the problem to be determined. For some classes of red galactic nuclei, the constraint-free population synthesis model is found to reproduce the chemical evolution scenario predicted by theoretical evolutionary models. It is shown that bluer nuclei tend to scatter more in the plane age versus metallicity diagram.
Bica Eduardo
Dottori Horácio Alberto
Schmidt Alex A.
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