Structure of neutron stars

Several aspects of the structure of neutron stars are considered from theoretical and observational perspectives. Theoretical limits on the mass and radius are considered, and these are compared with new observations of isolated neutron stars and quasi-periodic oscillators (QPOs). A radius determination provides information concerning the nuclear symmetry energy and its density dependence, but does not much constrain the stiffness of the EOS, contrary to popular belief. Three analytic structure solutions are discussed which shed light on other structural aspects of neutron stars, including their moments of intertia and binding energies. Pulsar glitches may constrain the distribution of the moment of inertia inside a star and supernova neutrinos, marking the birth of a neutron star, may constrain the neutron star's binding energy.