Constraining the evolutionary histories of spiral disks

Details Constraining the evolutionary histories of spiral disks Constraining the evolutionary histories of spiral disks

2002-03-22

arxiv.org/abs/astro-ph/0203400v1

Astronomy and Astrophysics

Astrophysics

2 pages, 1 figures, to appear in Rev.Mex. A.A. (conference series), Science with GTC, (Granada, 2002)

Scientific paper

We study the old problem of the uniqueness of chemical evolution models. We showed in Molla et al. (1999) that multiphase models for three Virgo cluster galaxies were able to reproduce the observed radial distributions of spectral indices Mg2 and Fe52. But those models may fit the present-epoch radial distributions with different star formation histories. The two spectral indices are in turn affected by the well known age-metallicity degeneracy which prevents the disentagling of age and metallicity for single stellar populations. In this work we face both issues by analyzing a set of multiphase models for the Virgo galaxy NGC 4303

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