the Sun is potentially the most sensitive probe, superior to direct detection and other indirect signatures. This is especially the case for models in which WIMP-nucleus scattering is dominated either by spin-dependent interactions or proceeds through an inelastic transition to a nearby excited state. We also analyze the prospects for detecting gamma rays generated by dark matter annihilations inside Jupiter using atmospheric Čerenkov gamma-ray detectors, as well as the potential for observing pairs of upward going muons in neutrino telescopes generated by the decay of mediators to muons. Finally we offer some preliminary speculations concerning an interpretation of PAMELA’s rising positron fraction originating within the solar system, and discuss the obstacles to this identification as well as ‘smoking gun’ directional and temporal signatures which can confirm or rule out such an interpretation.

The rest of this paper is organized as follows. In the next section we present the WIMP trapping rates and general formulae for calculating the WIMP-powered gamma ray flux, including angular and energy distributions. Section 3 contains estimates of the gamma ray signature in two variants of secluded models, with pseudoscalar(‘axion’)- and vector-mediation. We conclude in Section 4 with a discussion of future prospects for improving sensitivity to 