The Massive Nearby SBNGs: Young Galaxies in Formation

Details The Massive Nearby SBNGs: Young Galaxies in Formation The Massive Nearby SBNGs: Young Galaxies in Formation

1998-02-23

arxiv.org/abs/astro-ph/9802285v1

Astronomy and Astrophysics

Astrophysics

5 pages with 1 figure. To appear in the proceedings of "Abundance profiles: diagnostic tools for galaxy history", eds. D. Frie

Scientific paper

We discuss the implications of the recent discovery that Starburst Nucleus Galaxies (SBNGs) have lower oxygen abundances than "normal galaxies" of the same morphological type. Our interpretation of this result is that SBNGs are young galaxies, still in the process of formation. We consider several alternatives, but none of them provides a viable explanation. This new result has important consequences for our understanding of galaxy evolution, as it confirms the scenario of hierarchical formation of galaxies, and explains recent observations of the Hubble Space Telescope.

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