Numerical Models of Spin-Orbital Coupling in Neutron Star Binaries

Details Numerical Models of Spin-Orbital Coupling in Neutron Star Binaries Numerical Models of Spin-Orbital Coupling in Neutron Star Binaries

2004-01-26

arxiv.org/abs/gr-qc/0401104v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

4 pages, 3 figures. Submitted to the Proceedings of the "X Marcel Grossmann Meeting on General Relativity" in Rio de Janeiro,

Scientific paper

We present a new numerical scheme for solving the initial value problem for quasiequilibrium binary neutron stars allowing for arbitrary spins. We construct sequences of circular-orbit binaries of varying separation, keeping the rest mass and circulation constant along each sequence. The spin angular frequency of the stars is shown to vary along the sequence, a result that can be derived analytically in the PPN limit. This spin effect, in addition to leaving an imprint on the gravitational waveform emitted during binary inspiral, is measurable in the electromagnetic signal if one of the stars is a pulsar visible from Earth.

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