The dark halo in the spiral galaxy NGC 755

Details The dark halo in the spiral galaxy NGC 755 The dark halo in the spiral galaxy NGC 755

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004bdmh.confe..77k&link_type=abstract

"Proceedings of "Baryons in Dark Matter Halos". Novigrad, Croatia, 5-9 Oct 2004. Editors: R. Dettmar, U. Klein, P. Salucci. Publ

Physics

Scientific paper

The radial density distribution in dark matter halos of galaxies derived from numerical ΛCDM simulations is universal and scale invariant. Rotation curves are an important tool to put these predictions to the test. In order to obtain an extended rotation curve of the spiral galaxy NGC 755 we applied a new method to fit tilted rings to a data cube acquired with the VLA. Our findings were combined with existing results from optical spectroscopy to provide the highest possible spatial resolution towards the center. We present the resulting rotation curve and its implications for the density distribution of this galaxy's dark matter halo, indicating a core-dominated halo model.

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