174 citations · 174 across the 1 of their papers we have counts for
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astro-ph2006★ 174 cited
A Possible Origin of the Mass-Metallicity Relation of Galaxies
J. Koeppen, C. Weidner, P. Kroupa
Observations show that galaxies follow a mass-metallicity relation over a wide range of masses. One currently favoured explanation is that less massive galaxies are less able to re…
astro-ph2001
The Galactic Bulge: The Stellar and Planetary Nebulae Populations
F. Cuisinier, J. Koppen, A. Acker +1
We compare abundances patterns in the Bulge for elements observed in stars and in planetary nebulae. Some alpha elements, like Mg and Ti, are overabundant respect to Fe, and others…