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A&A 385, 816-846 (2002)
DOI: 10.1051/0004-6361:20020080
High-resolution rotation curves of low surface brightness galaxies
W. J. G. de Blok1 and A. Bosma21 ATNF, CSIRO, PO Box 76, Epping NSW 1710, Australia
2 Observatoire de Marseille, 2 place Le Verrier, 13248 Marseille Cedex 4, France
(Received 18 July 2001 / Accepted 15 January 2002 )
Abstract
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
Offprint request: W. J. G. de Blok, edeblok@atnf.csiro.au
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