Stacy McGaugh (University of Maryland)
"Are Cuspy Halos Viable?"


I will address the status of the data for dwarf and LSB galaxies which test cuspy halo models. There are several tests which can be applied:

1. the inner density profile of halos;
2. the concentration-cosmology relation; and
3. total halo masses and baryonic disk fractions.

Current data might be reconciled with (2) if the density parameter or power spectrum amplitude on galaxy scales are somewhat lower than for "standard" LCDM. Prospects for satisfying (1) and (3) are less good: the cusp core problem does appear to be genuine.

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