Volume 385, Number 3, April III 2002
|Page(s)||816 - 846|
|Published online||15 April 2002|
High-resolution rotation curves of low surface brightness galaxies *
ATNF, CSIRO, PO Box 76, Epping NSW 1710, Australia
2 Observatoire de Marseille, 2 place Le Verrier, 13248 Marseille Cedex 4, France
Corresponding author: W. J. G. de Blok, firstname.lastname@example.org
Accepted: 15 January 2002
We present high-resolution rotation curves of a sample of 26 low surface brightness galaxies. From these curves we derive mass distributions using a variety of assumptions for the stellar mass-to-light ratio. We show that the predictions of current Cold Dark Matter models for the density profiles of dark matter halos are inconsistent with the observed curves. The latter indicate a core-dominated structure, rather than the theoretically preferred cuspy structure.
Key words: galaxies: structure / galaxies: kinematics and dynamics / galaxies: halos
© ESO, 2002
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