Bayesian inference of neutron star crust properties using neutron skin constraints

It is known that the thickness of neutron skins - the layer of excess neutrons at the surface of neutron rich isotopes - is correlated with certain neutron star properties. Using a Bayesian analysis of neutron skin measurements 208Pb, 48Ca and tin isotopes, we constrain values for the nuclear symmetry energy at nuclear saturation density. Using the posterior distribution of symmetry energy parameters we then model the neutron star crust and infer ranges for the location of the crust-core transition and the amount of nuclear “pasta” - non-spherical nuclear geometries - at the base of the crust.