Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2005-11-25
Phys.Rev.Lett. 97 (2006) 171101
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
4 pages, 6 figures, revised version, PRL in press
Scientific paper
10.1103/PhysRevLett.97.171101
Equilibria of binary neutron stars in close circular orbits are computed numerically in a waveless formulation: The full Einstein-relativistic-Euler system is solved on an initial hypersurface to obtain an asymptotically flat form of the 4-metric and an extrinsic curvature whose time derivative vanishes in a comoving frame. Two independent numerical codes are developed, and solution sequences that model inspiraling binary neutron stars during the final several orbits are successfully computed. The binding energy of the system near its final orbit deviates from earlier results of third post-Newtonian and of spatially conformally flat calculations. The new solutions may serve as initial data for merger simulations and as members of quasiequilibrium sequences to generate gravitational wave templates, and may improve estimates of the gravitational-wave cutoff frequency set by the last inspiral orbit.
Friedman John L.
Gourgoulhon Eric
Limousin Francois
Shibata Masaru
Uryu Koji
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