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

Journal Article · 23 March 2023 · Classical and Quantum Gravity

DOI: https://doi.org/10.1088/1361-6382/acc231 · OSTI ID:1963282

Gonzalez, Alejandra ; Zappa, Francesco ; Breschi, Matteo ; Bernuzzi, Sebastiano ; Radice, David; Adhikari, Ananya; Camilletti, Alessandro ; Vivekanandji Chaurasia, Swami; Doulis, Georgios; Padamata, Surendra; Rashti, Alireza; Ujevic, Maximiliano; Brügmann, Bernd; Cook, William; Dietrich, Tim; Perego, Albino; Poudel, Amit; Tichy, Wolfgang

Abstract We 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 $\ell =m=4$ . 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.

• Research Organization: Pennsylvania State Univ., University Park, PA (United States)
• Sponsoring Organization: National Science Foundation (NSF); USDOE; USDOE Office of Science (SC), Nuclear Physics (NP)
• Grant/Contract Number: AC02-05CH11231; SC0021177
• OSTI ID: 1963282
• Journal Information: Classical and Quantum Gravity, Journal Name: Classical and Quantum Gravity Journal Issue: 8 Vol. 40; ISSN 0264-9381
• Publisher: IOP PublishingCopyright Statement
• Country of Publication: United Kingdom
• Language: English