Astronomy and Astrophysics – Astrophysics
Scientific paper
1996-06-19
Astronomy and Astrophysics
Astrophysics
4 pages with 2 encapsulated postscript figures, ASP Conf. macros included, to appear in the proceeding of the "IAGUSP Workshop
Scientific paper
In a diagram of metallicity (\~z) vs. luminosity (M$_B$), the different types of nearby (Z $< 0.05$) starburst galaxies seem to follow the same linear relationship as the normal spiral and irregular galaxies. However, for comparable luminosities the more massive starburst nucleus galaxies (SBNGs) show a slight metallic defficiency as compared to the giant spiral galaxies. Furthermore, the SBNGs do not seem to follow the same relationship between \~z and Hubble type (T) than the normal galaxies. The early-type SBNGs are metal poor as compared to normal galaxies. It may suggests that the chemical evolution of a majority of the nearby starbursts galaxies is not completely over and that the present burst represent an important phase of this process.
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