The Hartle-Thorne slow-rotation expansion is extended to seventh order, yielding analytical exterior metrics and multipole moments up to S7 for isolated neutron stars.
III B, the metric perturbations describing the mass monopole corrections of the star (ℓ = 0 and s being even) are described by the functions m(s) 0 , h(s) 0 , and ξ(s) 0
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Highly-accurate neutron star modeling in the Hartle-Thorne Approximation
The Hartle-Thorne slow-rotation expansion is extended to seventh order, yielding analytical exterior metrics and multipole moments up to S7 for isolated neutron stars.