Towards real neutron star seismology: Accounting for elasticity and superfluidity

Understand

We study the effects of an elastic crust on the oscillation spectrum of superfluid neutron stars.

• Within the two fluid formalism, we consider Newtonian stellar models that include the relevant constituents of a mature neutron stars.
• The core is formed by a mixture of superfluid neutrons and a conglomerate of charged particles, while the inner crust is described by a lattice of nuclei permeated by superfluid neutrons.
• We linearise the Poisson and the conservation equations of nonrotating superfluid stars and study the effects of elasticity, entrainment and composition stratification on the shear and acoustic modes.