Gravity Seminars

Ultralight axion-like particles, an excellent candidate for dark matter, can mediate a long-range macroscopic force with monopole-monopole and monopole-dipole interactions between the planets and the Sun. The presence of these long-range potentials affects the perihelion precession of planets, gravitational light bending and Shapiro time delay. From the precision studies of these tests of gravity, we obtain new constraints on the macroscopic forces. The bound is three orders of magnitude stronger than the Eot-Wash experiment. The ultralight scalar and vector dark matter also influence active-sterile neutrino oscillation in the supernova core which is one of the solutions to explain the longstanding problem of the pulsar kick. The signal from the asymmetric emission of neutrinos in the presence of an ultralight dark matter background can be probed by future gravitational wave detectors. The effects of ultralight dark matter in explaining pulsar kick are equivalent to the Lorentz and CPT invariance violation in the theory and we obtain an equivalent bounds on these parameters.