Binary Neutron Stars Systems: Irrotational Quasi-Equilibrium Sequences

Details Binary Neutron Stars Systems: Irrotational Quasi-Equilibrium Sequences Binary Neutron Stars Systems: Irrotational Quasi-Equilibrium Sequences

1999-03-30

arxiv.org/abs/gr-qc/9903105v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

7 pages, 2 ps figures. To appear in the proceedings of the 19th Texas Symposium

Scientific paper

We report on numerical results from an independent formalism to describe the quasi-equilibrium structure of nonsynchronous binary neutron stars in general relativity. This is an important independent test of controversial numerical hydrodynamic simulations which suggested that nonsynchronous neutron stars in a close binary can experience compression and even collapse prior to the last stable circular orbit. We show that the interior density indeed increases as irrotational binary neutron stars approach their last orbits for particular values of the compaction ratio. The observed compression is however at a significantly reduced level.

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