Felix Stoehr (MPA)
"The LCDM Milky Way: On substructure and neutralino
annihilation"
ABSTRACT
We compare observations of the internal structure and kinematics
of the known Milky Way satellites with high resolution
simulations of the formation of its dark halo in a LCDM
universe. In contrast to earlier work we find excellent
agreement. If there is a substructure "problem" it consists in
understanding why halo substructures have been so inefficient in
making stars.
In the second part we use the same simulations to predict the
gamma-ray flux from possible Dark Matter annihilation. We
measure the effect of gravitationally bound substructure as well
as unbound density fluctuations directly from the simulation. We
find that the overall enhancement with respect to the smooth
halo is smaller than a factor of 3.5.
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