2003/02/05 by M. Mollá, M. Molla, Molla, M. +2
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/0302086
Proceedings of the V Scientific Meeting of the Spanish Astronomical Society (Toledo, Spain, 2002)
arxiv created 2003/02/05 · openalex publication_date 2003/02/05 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have computed 500 chemical evolution models for the galaxy NGC 4303. With the obtained evolutionary histories and a synthesis model we have also calculated the spectral indices Mg2 and Fe5270. Fom the 500 models, by using a chi-square technique, we obtain those reproducing the present day observations within a confidence level of 95 %, reducing the number of possible models to 19. Only 6 of them are also able to reproduce the spectral indices radial distributions with the same level of confidence. We conclude that this technique of combining chemical with evolutionary synthesis models is a very powerful tool, and, therefore, we propose to perform more observational campaigns to obtain these and other spectral indices in spiral and irregular galaxies.