Astrophysical observations of a dark matter-baryon fifth force

Due to intensive theoretical and experimental study over the past several decades, fifth forces between baryonic matter are tightly constrained. Long-range fifth forces between baryonic matter and dark matter are less well studied and constrained. In this talk, I will discuss limits on a long-range force between baryonic and dark matter, focusing in particular on limits from neutron star temperature and pulsar timing observations.