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Abstract

We present the second data release of gravitational waveforms from binary
neutron star merger simulations performed by the Computational Relativity
(CoRe) collaboration. The current database consists of 254 different binary
neutron star configurations and a total of 590 individual numerical-relativity
simulations using various grid resolutions. The released waveform data contain
the strain and the Weyl curvature multipoles up to $\ell=m=4$. They span a
significant portion of the mass, mass-ratio,spin and eccentricity parameter
space and include targeted configurations to the events GW170817 and GW190425.
CoRe simulations are performed with 18 different equations of state, seven of
which are finite temperature models, and three of which account for
non-hadronic degrees of freedom. About half of the released data are computed
with high-order hydrodynamics schemes for tens of orbits to merger; the other
half is computed with advanced microphysics. We showcase a standard waveform
error analysis and discuss the accuracy of the database in terms of
faithfulness. We present ready-to-use fitting formulas for equation of
state-insensitive relations at merger (e.g. merger frequency), luminosity peak,
and post-merger spectrum.