BN1 - Compact Binaries and Strong-Field Tests of Gravity |
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Speaker |
Rezzolla, Luciano |
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Coauthors |
K. Takami, L. Baiotti |
| Talk Title |
Spectral properties of the post-merger gravitational-wave signal from binary neutron stars} |
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Abstract |
Determining the equation of state of matter at nuclear density and hence the structure of neutron stars has been a riddle for decades. We show how the imminent detection of gravitational waves from merging neutron star binaries can be used to solve this riddle. Using a large number of accurate numerical-relativity simulations of binaries with nuclear equations of state, we find that the postmerger emission is characterized by two distinct and robust spectral features. While the high-frequency peak has already been associated with the oscillations of the hypermassive neutron star produced by the merger and depends on the equation of state, a new correlation emerges between the low-frequency peak, related to the merger process, and the total compactness of the stars in the binary. More importantly, such a correlation is essentially universal, thus providing a powerful tool to set tight constraints on the equation of state. |
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