Buoyancy and g-modes in young superfluid neutron stars

Understand

We consider the local dynamics of a realistic neutron star core, including composition gradients, superfluidity and thermal effects.

• The main focus is on the gravity g-modes, which are supported by composition stratification and thermal gradients.
• We derive the equations that govern this problem in full detail, paying particular attention to the input that needs to be provided through the equation of state and distinguishing between normal and superfluid regions.
• The analysis highlights a number of key issues that should be kept in mind whenever equation of state data is compiled from nuclear physics for use in neutron star calculations.