- Conference date: 28 November–2 December 2011
- Location: Colima, Mexico
Observations seem to support that dwarf Spheroidal (dSph) galaxies have a cored halo. Ursa Minor (UMi) is one of the most dark-matter dominated dSph in the Local Group and the long survival time of its cold stellar clump can be explainedwith a large enough core in its density profile. Bosonic dark matter predicts cored halos in a natural way. The size of the core depends on the mass m of the dark matter boson and on the strength of the boson self-interaction λ . In this work we constrain m and m 4/λ such as the core in bosonic halos be compatible with the survival time of UMi's clump.