Several new observations of neutron stars are beginning to shed light on the composition and structure of the densest form of observable cold matter in our Universe. Examples include the recent reports of two-solar-mass neutron stars (PSR J1614-2230 and PSR J0348+0432), the rapid cooling of the neutron star in Cassiopeia A, and a candidate for coalescence of compact object binaries. In this talk, implications of these observations for the theoretical models of extreme states of matter will be highlighted.

Argonne Physics Division Colloquium Schedule