Bibcode
Weidner, C.; Kroupa, P.
Referencia bibliográfica
Near-fields cosmology with dwarf elliptical galaxies, IAU Colloquium Proceedings of the international Astronomical Union 198, Held 14-18 March, Switzerland, edited by Jerjen, H.; Binggeli, B. Cambridge: Cambridge University Press, 2005., pp.130-133
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2005
Número de citas
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Número de citas referidas
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Descripción
Dwarf galaxies tend to have a large spread in metal abundances and
overall lower metallicites than large Spiral or Elliptical ones. Here we
propose that if all stars are formed from an invariant canonical IMF
within each star cluster which are distributed according to an embedded
cluster mass function (ECMF), then the integrated stellar IMF over the
whole galaxy (the integrated galaxial IMF, IGIMF) must be steeper than
the canonical IMFs within the clusters, and additionally they must
depended on the stellar mass of the galaxy. In particular, dwarf
galaxies and low-surface brightness galaxies show steeper galaxial IMFs
which vary strongly with the star-formation rate. The resulting number
of Supernovae II per low-mass star, and the chemical enrichment history
of these galaxies therefore vary substantially depending on the galaxy
assembly history.