Second release of the CoRe database of binary neutron star merger waveforms

Author:

Gonzalez AlejandraORCID,Zappa FrancescoORCID,Breschi MatteoORCID,Bernuzzi SebastianoORCID,Radice David,Adhikari Ananya,Camilletti AlessandroORCID,Vivekanandji Chaurasia Swami,Doulis Georgios,Padamata Surendra,Rashti Alireza,Ujevic Maximiliano,Brügmann Bernd,Cook William,Dietrich Tim,Perego Albino,Poudel Amit,Tichy WolfgangORCID

Abstract

AbstractWe present the second data release of gravitational waveforms from binary neutron star (BNS) merger simulations performed by the Computational Relativity (CoRe) collaboration. The current database consists of 254 different BNS 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=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.CoResimulations 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.

Funder

Division of Nuclear Physics under Award

DFG grants INST

FUGG

Gauss Centre for Supercomputing e.V.

ISCRA-B

Research Training Group

National Science Foundation

Office of Science

National High Performance Computing Center Stuttgart

MEMI

Leibniz Supercomputing Centre

ERC

Deutsche Forschungsgemeinschaft

Publisher

IOP Publishing

Subject

Physics and Astronomy (miscellaneous)

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