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Binary Neutron Stars in General Relativity: Quasiequilibrium Models

1997; American Physical Society; Volume: 79; Issue: 7 Linguagem: Inglês

10.1103/physrevlett.79.1182

1092-0145

Thomas W. Baumgarte, Gregory B. Cook, Mark Scheel, S. L. Shapiro, Saul A. Teukolsky,

Astrophysical Phenomena and Observations

We perform fully relativistic calculations of binary neutron stars in quasi-equilibrium circular orbits. We integrate Einstein's equations together with the relativistic equation of hydrostatic equilibrium to solve the initial value problem for equal-mass binaries of arbitrary separation. We construct sequences of constant rest mass and identify the innermost stable circular orbit and its angular velocity. We find that the quasi-equilibrium maximum allowed mass of a neutron star in a close binary is slightly larger than in isolation.