2002/03/22 by M. Mollá, M. Molla, Molla, M. +3
Engineering · Physics and Astronomy · #Astrophysics (astro-ph) #FOS: Physical sciences #Tribology and Lubrication Engineering #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0203400
2 pages, 1 figures, to appear in Rev.Mex. A.A. (conference series), Science with GTC, (Granada, 2002)
arxiv created 2002/03/22 · openalex publication_date 2002/03/22 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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