IMF variations in dwarf galaxies

Bibcode
2005nfcd.conf..130W
DOI
10.1017/S1743921305003625
Weidner, C.; Kroupa, P.
Bibliographical reference

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

Advertised on:
0
2005
Number of authors
2
IAC number of authors
0
Citations
0
Refereed citations
0
Description
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.
Type
Non-refereed

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