CoRe database of binary neutron star merger waveforms

Abstract

We present the Computational Relativity (CoRe) collaboration's public database of gravitational waveforms from binary neutron star mergers. The database currently contains 367 waveforms from numerical simulations that are consistent with general relativity and that employ constraint satisfying initial data in hydrodynamical equilibrium. It spans 164 physically distinct configuration with different binary parameters (total binary mass, mass-ratio, initial separation, eccentricity, and stars' spins) and simulated physics. Waveforms computed at multiple grid resolutions and extraction radii are provided for controlling numerical uncertainties. We also release an exemplary set of 18 hybrid waveforms constructed with a state-of-art effective-one-body model spanning the frequency band of advanced gravitational-wave detectors. We outline present and future applications of the database to gravitational-wave astronomy.

Improving the NRTidal model for binary neutron star systems

“…[114]], would be the incorporation of a larger number of NR simulations as publicly available under www.computational-relativity.org, Ref. [28]. However, we postpone this to future work [116], in which a more general discussion about quasi-universal relations during the BNS coalescence will be given.…”

“…As a first validation check, we compute the time domain phase difference between IMRPhenomPv2_NRTidalv2 and a selected set of NR data; see Table III. All of the employed waveforms are publicly available in the CoRe database (www.computational-relativity.org [28]).…”

“…Those waveforms have been constructed for Ref. [34] and are publicly available under www.computational-relativity.org [28]. We refer to [34] for further details.…”

“…Over the last years, there has been significant progress modeling the GW signal associated with the BNS coalescence, including the computation of higher-order tidal corrections or spin-tidal coupling, e.g., Refs. [18][19][20][21][22][23], and improved accuracy of BNS numerical relativity (NR) simulations [24][25][26][27][28][29]. However, although the analytical progress has improved the performance of post-Newtonian (PN) waveform approximants, PN models still become increasingly inaccurate towards the merger, e.g.…”

Kilohertz gravitational waves from binary neutron star remnants: Time-domain model and constraints on extreme matter

“…In this paper we construct the first phase-coherent inspiral-merger-postmerger model for the BNS GW spectrum and demonstrate its applications to constrain the NS EOS in GW astronomy observations. Section II introduces a NR postmerger model for quasicircular binaries called NRPM, based on the quasiuniversal relations of [16] and implemented using the NR database of the computational relativity (CoRe) collaboration [61].…”