output
19962025
most citedOn The Cosmic Origins Of Carbon And Nitrogen

399 citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions
Showing 2006 · astro-phShow all

2 papers · 2 filters

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-ph2006★ 53 cited

Chemical compositions and plasma parameters of planetary nebulae with Wolf-Rayet and wels type central stars

P. Girard, J. Koppen, A. Acker

Aims: Chemical compositions and other properties of planetary nebulae around central stars of spectral types [WC], [WO], and wels are compared with those of `normal' central stars,…