Gravity-mediated (or Composite) Dark Matter Confronts Astrophysical Data
  We consider the astrophysical bounds on a new form of dark matter, the so
called Gravity-mediated Dark Matter. In this scenario, dark matter communicates
with us through a mediator sector composed of gravitational resonances, namely
a new scalar (radion) and a massive spin-two resonance (massive graviton). We
consider specific models motivated by natural electroweak symmetry breaking or
weak-scale dark matter in the context of models in warped extra-dimensions and
their composite duals. The main Dark Matter annihilation mechanism is due to
the interactions of KK gravitons to gauge bosons that propagate in bulk. We
impose the bounds on monochromatic or continuum photons from Fermi-LAT and
HESS. We also explore scenarios in which the Fermi gamma-ray line could be a
manifestation of Gravity-mediated Dark Matter.
