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Constraining nuclear equations of state using gravitational waves from hypermassive neutron stars

Masaru Shibata
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Abstract

Latest general relativistic simulations for merger of binary neutron stars with realistic equations of state (EOSs) show that a hypermassive neutron star of an ellipsoidal figure is formed after the merger if the total mass is smaller than a threshold value which depends on the EOSs. The effective amplitude of quasiperiodic gravitational waves from such hypermassive neutron stars is $\sim 6$--$7 \times 10^{-21}$ at a distance of 50 Mpc, which may be large enough for detection by advanced laser interferometric gravitational wave detectors although the frequency is high $\sim 3$ kHz. We point out that the detection of such signal may lead to constraining the EOSs for neutron stars.

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Masaru Shibata. 2005-04-19. Constraining nuclear equations of state using gravitational waves from hypermassive neutron stars. https://doi.org/10.1103/physrevlett.94.201101

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