Speaker: Dan Thomas
I will begin by examining the role of Newtonian gravity in cosmology and making some remarks about the literature and the universe that we live in. A fictional character with a well known catchphrase may or may not appear here as part of a particularly laboured analogy. I will then briefly introduce the post-Friedmann formalism, a post-Newtonian-esque expansion that has been developed here at Portsmouth. This formalism suggests that a vector “frame-dragging” potential is required on non-linear scales for consistency of the Einstein equations.
The second half of the talk will be devoted to examining this vector potential: its physical meaning, its amplitude on non-linear scales and its possible observational consequences.