| Abstract: | We present the results of a first search for self-annihilating dark matter in
nearby galaxies and galaxy clusters using a sample of high energy neutrinos
acquired in 339.8 days of livetime during 2009/10 with the IceCube neutrino
observatory in its 59-string configuration. The targets of interest include the
Virgo and Coma galaxy clusters, the Andromeda galaxy and several dwarf
galaxies. We obtain upper limits on the cross section as function of the WIMP
mass between 300 GeV and 100 TeV for the annihilation into b bbar, W+W-,
au+ au-, mu+mu- and
u
u bar. A limit derived for the Virgo cluster,
when assuming a large effect from subhalos, challenges the WIMP interpretation
of a recently observed GeV positron excess in cosmic rays. |
REGISTER
Did you like this article? 
