Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...228....6a&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 228, no. 1, Feb. 1990, p. 6-16. Research supported by CNRS.
Astronomy and Astrophysics
Astrophysics
18
Compact Galaxies, Irregular Galaxies, Star Formation, Metallicity, Star Formation Rate, Stellar Evolution, Ubv Spectra
Scientific paper
The star formation histories of irregular and blue compact galaxies are discussed. The chemical and photometric properties of these galaxies, including possible fluctuations in the star formation rate (SFR) and in the initial mass function (IMF), are computed by means of an evolutionary method of population synthesis taking into account the change in the stellar metallicity that follows the chemical evolution process, thus explaining the chemical and photometric properties of galaxies in a consistent way. Four different possibilities have been explored, i.e., (1) a continuous star formation, (2) a composite model formed by an underlying stellar population with a superposed star burst, (3) a simple star burst, and (4) a time flattening IMF.
Arimoto Nobou
Tarrab I.
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