Stationary, Axisymmetric Neutron Stars with Meridional Circulation in General Relativity

Abstract

We present the first stationary, axisymmetric neutron star models with meridional circulation in general relativity. For that purpose, we developed GRNS, a new code based on a fixed point iteration. We find a two-dimensional set of meridional circulation modes, which differ by the number of vortices in the stream lines of the neutron star fluid. For expected maximal meridional circulation velocities of about 1000 km/s, the vortices cause surface deformations of about a percent. The deformations depend on the shape of the vortices close to the surface and increase with the meridional circulation velocity. We also computed models of rotating neutron stars with meridional circulation, where neither the surface rotates nor does the rotation velocity exceed the circulation velocity.

Cited by in corpus (5)

• Equilibrium solutions of relativistic rotating stars with mixed poloidal and toroidal magnetic fields
• Parameterizations of black-hole spacetimes beyond circularity
• Deformed black hole in Sagittarius A
• Resonant orbits of rotating black holes beyond circularity: Discontinuity along parameter shift
• Standard cooling of rapidly rotating isolated neutron stars in 2D