We explore in detail the possibility that gravitational wave signals from binary inspirals are affected by a new force that couples only to dark matter particles. We discuss the impact of both the new force acting between the binary partners as well as radiation of the force carrier. We identify numerous constraints on any such scenario, ultimately concluding that observable effects on the...
Structure formation at small cosmological scales provides an important frontier for Dark Matter (DM) research. Scenarios with small DM particle masses, large momenta or hidden interactions tend to suppress the gravitational clustering at small scales, inducing a cut-off in the matter power spectrum P(k) on such small scales. So far, many non-cold DM (nCDM) candidates have been proposed in...