Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2008
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..396..445k&link_type=abstract
Formation and Evolution of Galaxy Disks ASP Conference Series, Vol. 396, Proceedings of the conference held 1-5 October, 2007 at
Astronomy and Astrophysics
Astronomy
Scientific paper
The NFW halo has been difficult to reconcile with low surface brightness (LSB) galaxy data. NFW fits to LSB rotation curves often have concentrations lower than expected for a ΛCDM cosmology, and high-resolution Hα velocity fields do not show the characteristic NFW pinching of isovelocity contours. We simulate the two-dimensional NFW halo and test several modifications to the potential in an attempt to simultaneously reconcile both the NFW velocity field and rotation curve with observed LSB galaxy data. We present mock velocity fields and rotation curves of axisymmetric and non-axisymmetric NFW potentials and compare our simulation results to high-resolution velocity fields from integral field spectroscopy of LSB galaxies.
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