Evolution of Close Neutron Star Binaries

Abstract

We have calculated evolution of neutron star binaries towards the coalescence driven by gravitational radiation. The hydrodynamical effects as well as the general relativistic effects are important in the final phase. All corrections up to post${}^{2.5}$-Newtonian order and the tidal effect are included in the orbital motion. The star is approximated by a simple Newtonian stellar model called affine star model. Stellar spins and angular momentum are assumed to be aligned. We have showed how the internal stellar structure affects the stellar deformation, variations of the spins, and the orbital motion of the binary just before the contact. The gravitational wave forms from the last a few revolutions significantly depend on the stellar structure.

13 pages, LaTeX, 15 figures, to appear in Prog. Theor. Phys. vol.96

References in corpus (1)

• TIDAL AND TIDAL-RESONANT EFFECTS IN COALESCING BINARIES

Cited by in corpus (8)

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• Relativistic Hydrodynamics in Close Binary Systems: Analysis of Neutron-Star Collapse
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• Tidal interaction in compact binaries: a post-Newtonian affine framework
• General-relativistic treatment of tidal $g$-mode resonances in coalescing binaries of neutron stars. II. As triggers for precursor flares of short gamma-ray bursts
• Implementing Tidal and Gravitational Wave Energy Losses in Few-body Codes: A Fast and Easy Drag Force Model
• Gravitational signals due to tidal interactions between white dwarfs and black holes