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Ultralight Dark Matter Resonates with Binary Pulsars
Physical Review Letters
We consider the scenario where dark matter (DM) is represented by an ultra-light classical scalar field performing coherent periodic oscillations. We point out that such DM perturbs the dynamics of binary systems either through its gravitational field or via direct coupling to ordinary matter. This perturbation gets resonantly amplified if the frequency of DM oscillations is close to a (half-)integer multiple of the orbital frequency of the system and leads to a secular variation of the orbitaldoi:10.1103/physrevlett.118.261102 pmid:28707940 fatcat:gvgzowqlxnf73bqprmddqslamy