Searching for Dark Matter with NuSTAR

Dark matter particles could be unstable and decay, annihilate with each other, or subtly alter the processes within stellar interiors, imprinting characteristic signals in the X-ray sky. The central challenge is to distinguish these signatures from similar spectra produced by standard astrophysical processes, such as the life and death of stars and the interactions of cosmic rays with interstellar material. I will review the novel observation strategies and analysis techniques that have enabled NuSTAR to deliver leading sensitivity to dark matter candidates, in particular sterile neutrinos and axions.