Tides in merging neutron stars: Consistency of the GW170817 event with experimental data on finite nuclei

Abstract

The agreement of the nuclear equation of state (EoS) deduced from the GW170817 based tidal deformability with the one obtained from empirical data on microscopic nuclei is examined. It is found that suitably chosen experimental data on isoscalar and isovector modes of nuclear excitations together with the observed maximum neutron star mass constrain the EoS which displays a very good congruence with the GW170817 inspired one. The giant resonances in nuclei are found to be instrumental in limiting the tidal deformability parameter and the radius of neutron star in somewhat narrower bounds. At the 1$\sigma$ level, the values of the canonical tidal deformability ${\Lambda }_{1.4}$ and the neutron star radius $R_{1.4}$ come out to be $267\pm 144$ and $11.6\pm 1.0$ km, respectively.

arXiv comment6 pages, 3 figures

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