Unraveling information about supranuclear-dense matter from the complete binary neutron star coalescence process using future gravitational-wave detector networks
Puecher, Anna; Dietrich, Tim; Tsang, Ka Wa; Kalaghatgi, Chinmay; Roy, Soumen; Setyawati, Yoshinta; Van Den Broeck, Chris
(2023) Physical Review D, volume 107, issue 12
(Article)
Abstract
Gravitational waves provide us with an extraordinary tool to study the matter inside neutron stars. In particular, the postmerger signal probes an extreme temperature and density regime and will help reveal information about the equation of state of supranuclear-dense matter. Although current detectors are most sensitive to the signal emitted
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by binary neutron stars before the merger, the upgrades of existing detectors and the construction of the next generation of detectors will make postmerger detections feasible. For this purpose, we present a new analytical, frequency-domain model for the inspiral-merger-postmerger signal emitted by binary neutron star systems. The inspiral and merger parts of the signals are modeled with IMRPhenomD_NRTidalv2, and we describe the main emission peak of the postmerger with a three-parameter Lorentzian, using two different approaches: one in which the Lorentzian parameters are kept free, and one in which we model them via quasiuniversal relations. We test the performance of our new complete waveform model in parameter estimation analyses, studying simulated signals obtained both from our developed model and by injecting numerical relativity waveforms. We investigate the performance of different detector networks to determine the improvement that future detectors will bring to our analysis. We consider Advanced LIGO+ and Advanced Virgo+, KAGRA, and LIGO-India. We also study the possible impact of a detector with high sensitivity in the kilohertz band like NEMO, and finally we compare these results to the ones we obtain with third-generation detectors, the Einstein Telescope and the Cosmic Explorer.
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Keywords: Bayesian-inference, Maximum mass, Remnant, Mergers, Search, Bilby, Nuclear and High Energy Physics
ISSN: 2470-0010
Publisher: American Institute of Physics
Note: Funding Information: We thank Anuradha Samajdar for the useful discussion. A. P., C. K., Y. S., and C. V. D. B. are supported by the research program of the Netherlands Organisation for Scientific Research (NWO). This work was performed using the Computing Infrastructure of Nikhef, which is part of the research program of the Foundation for Nederlandse Wetenschappelijk Onderzoek Instituten (NWO-I), which is part of the Dutch Research Council (NWO). The authors are grateful for computational resources provided by the LIGO Laboratory and supported by National Science Foundation Grants No. PHY-0757058 and No. PHY-0823459. This research has made use of data, software, and/or web tools obtained from the Gravitational Wave Open Science Center , a service of LIGO Laboratory, the LIGO Scientific Collaboration, and the Virgo Collaboration. LIGO is funded by the U.S. National Science Foundation. Virgo is funded by the French Centre National de Recherche Scientifique (CNRS), the Italian Istituto Nazionale della Fisica Nucleare (INFN), and the Dutch Nikhef, with contributions by Polish and Hungarian institutes. Publisher Copyright: © 2023 American Physical Society.
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