Cusp or Core

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Goerdt06: Goerdt, Moore, Read, Stadel, Zemp
Using globular clusters to determine the core/cusp of Fornax Dwarf galaxy.
Cusps lead GCs to spiral into the centre. If you replace the cusp with a core, you can alleviate the problem. Fornax must have a core. The core is consistent with a 0.5 keV dark matter particle.