High Resolution Optical Velocity Fields of 11 Low Surface Brightness Galaxies

Details High Resolution Optical Velocity Fields of 11 Low Surface Brightness Galaxies High Resolution Optical Velocity Fields of 11 Low Surface Brightness Galaxies

2006-04-27

arxiv.org/abs/astro-ph/0604576v1

Astrophys.J.Suppl. 165 (2006) 461-479

Astronomy and Astrophysics

Astrophysics

19 pages, 13 color figures; High resolution images at http://www.astro.umd.edu/~kuzio/PAPERS/dpakdata.html; Accepted for pub

Scientific paper

10.1086/505345

We present high resolution two-dimensional velocity fields from integral field spectroscopy along with derived rotation curves for eleven low surface brightness galaxies. We fit NFW and pseudo-isothermal halo models to the new data combined with previous long-slit and HI data. In most cases we find the pseudo-isothermal halo to better represent the data than the NFW halo, as the NFW concentrations are often lower than expected for a LambdaCDM cosmology. We also compare our results to previous studies and find that including the new two-dimensional optical data does not significantly alter the halo parameters, but does decrease the uncertainties by roughly a factor of 2.

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