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arXiv · 1109.5128

Eccentric binary neutron star mergers

Roman Gold·Sebastiano Bernuzzi·Marcus Thierfelder·Bernd Bruegmann·Frans Pretorius
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Abstract

Neutron star binaries offer a rich phenomenology in terms of gravitational waves and merger remnants. However, most general relativistic studies have been performed for nearly circular binaries, with the exception of head-on collisions. We present the first numerical relativity investigation of mergers of eccentric equal-mass neutron-star binaries that probes the regime between head-on and circular. In addition to gravitational waves generated by the orbital motion, we find that the signal also contains a strong component due to stellar oscillations (f-modes) induced by tidal forces, extending a classical result for Newtonian binaries. The merger can lead to rather massive disks on the order of 10% of the total initial mass.

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Roman Gold, Sebastiano Bernuzzi, Marcus Thierfelder, Bernd Bruegmann, Frans Pretorius. 2013-01-08. Eccentric binary neutron star mergers. https://doi.org/10.1103/physrevd.86.121501

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