David is a Blavatnik and Rothchild fellow at the University of Cambridge, testing theories of gravity with diverse methods. My main research recently is focused on Binary motion of stars (pulsars, Gravitational waves, Gaia...) and Binary galaxies to test dark energy and modified gravity.
Title: Dark Energy (and modified gravity) in two body problem: theoretical implications and observational constraints
Abstract: General Theory of Relativity needs at least one modification - the Cosmological Constant. Yet there are possibilities for other modified theories of gravity to explain the accelerated expansion. In this talk I'm going to discuss the impact of Modified Gravity on the two-body problem. In particular, with the latest observational constraints from the galactic center, binary pulsars and the Milky and Andromeda dynamics and forecast for future measurements.