  The IceCube neutrino observatory--installed in the Antarctic ice--is the
largest neutrino telescope to date. It consists of 5,160 photomultiplier-tubes
spread among 86 vertical strings making a total detector volume of more than a
cubic kilometer. IceCube detects neutrinos via Cherenkov light emitted by
charged relativistic particles produced when a neutrino interacts in or near
the detector. The detector is particularly sensitive to high-energy neutrinos
of due to its size and photosensor spacing. In this analysis we search for dark
matter that annihilates into a metastable mediator that subsequently decays
into Standard Model particles. These models yield an enhanced high-energy
neutrino flux from dark matter annihilation inside the Sun compared to models
without a mediator. Neutrino signals that are produced directly inside the Sun
are strongly attenuated at higher energies due to interactions with the solar
plasma. In the models considered here, the mediator can escape the Sun before
producing any neutrinos, thereby avoiding attenuation. We present the results
of an analysis of six years of IceCube data looking for dark matter in the Sun.
We consider mediator lifetimes between 1 ms to 10 s and dark matter masses
between 200 GeV and 75 TeV.
