1996/07/04 by Claudia S. Moeller, C. S. Moeller, Moeller, Claudia S. +8
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9607026
11 Pages, A&A plain Tex with figures included, also available on request or at http://www.uni-sw.gwdg.de/~cmoelle/preprints.html
arxiv created 1996/07/04 · openalex publication_date 1996/07/04 · arxiv updated 2009/12/01 · openalex created_date 2019/06/27 · openalex updated_date 2026/07/28
With a chemically consistent evolutionary synthesis approach we follow the\nenrichment of individual chemical elements in the ISM. We describe the time\nWith a chemically consistent evolutionary synthesis approach we follow the\nenrichment of individual chemical elements in the ISM. We describe the time\nevolution of broad band colors U to K and metal indices (Fe5335, Fe5270, Mg2,\nMgb), taking into account the increasing initial metallicities of successive\ngenerations of stars. Using specific star formation prescriptions for the\ndifferent spectral types of galaxies, we show our model galaxy broad band\ncolors, synthetic spectra, and ISM abundances are in agreement with\nobservations of nearby samples and template galaxies of the respective spectral\ntypes. We compare our synthetic Mg2 indices with observations and study the\ntime evolution of the stellar index [MgFe] for composite elliptical galaxy\nmodels and for simple stellar populations of various metallicities. We show how\nthe luminosity weighted stellar metallicity indicators in different wavelength\nbands from U to K compare to each other for the various star formation\nhistories and how they evolve in time. We analyse as a function of wavelength\nthe luminosity contributions of stellar subpopulations with different\nmetallicities in the various galaxy types. The relations between luminosity\nweighted stellar metallicity indicators in different passbands, stellar\nabsorption indices and ISM abundances are shown to depend significantly on the\nstar formation history and evolutionary stage.\n