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PIRSA:16030076

Video URL

https://pirsa.org/16030076

Testing gravity using astrophysics

Sakstein, J. (2016). Testing gravity using astrophysics. Perimeter Institute for Theoretical Physics. https://pirsa.org/16030076

Jeremy Sakstein University of Pennsylvania

Talk numberPIRSA:16030076
DOI10.48660/16030076
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Alternative theories of gravity are popular alternatives to the LCDM model because they can self-accelerate without a cosmological constant. On smaller scales, consistency with solar system tests of gravity is achieved by utilising screening mechanisms, which act to hide fifth-forces locally. This makes them difficult to distinguish from general relativity. In this talk I will describe recent work using astrophysical objects---stars, galaxies, and clusters---as new and novel probes of alternative gravity theories.