H alpha rotation curves of Low Surface Brightness galaxies

Details H alpha rotation curves of Low Surface Brightness galaxies H alpha rotation curves of Low Surface Brightness galaxies

2002-01-16

arxiv.org/abs/astro-ph/0201276v1

Astron.Astrophys.385:816,2002

Astronomy and Astrophysics

Astrophysics

Accepted for A&A, full version with high-res figures available at http://www.atnf.csiro.au/~edeblok/papers/bosma.ps.gz

Scientific paper

10.1051/0004-6361:20020080

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.

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