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- Title
An updated nuclear-physics and multi-messenger astrophysics framework for binary neutron star mergers.
- Authors
Pang, Peter T. H.; Dietrich, Tim; Coughlin, Michael W.; Bulla, Mattia; Tews, Ingo; Almualla, Mouza; Barna, Tyler; Kiendrebeogo, Ramodgwendé Weizmann; Kunert, Nina; Mansingh, Gargi; Reed, Brandon; Sravan, Niharika; Toivonen, Andrew; Antier, Sarah; VandenBerg, Robert O.; Heinzel, Jack; Nedora, Vsevolod; Salehi, Pouyan; Sharma, Ritwik; Somasundaram, Rahul
- Abstract
The multi-messenger detection of the gravitational-wave signal GW170817, the corresponding kilonova AT2017gfo and the short gamma-ray burst GRB170817A, as well as the observed afterglow has delivered a scientific breakthrough. For an accurate interpretation of all these different messengers, one requires robust theoretical models that describe the emitted gravitational-wave, the electromagnetic emission, and dense matter reliably. In addition, one needs efficient and accurate computational tools to ensure a correct cross-correlation between the models and the observational data. For this purpose, we have developed the Nuclear-physics and Multi-Messenger Astrophysics framework NMMA. The code allows incorporation of nuclear-physics constraints at low densities as well as X-ray and radio observations of isolated neutron stars. In previous works, the NMMA code has allowed us to constrain the equation of state of supranuclear dense matter, to measure the Hubble constant, and to compare dense-matter physics probed in neutron-star mergers and in heavy-ion collisions, and to classify electromagnetic observations and perform model selection. Here, we show an extension of the NMMA code as a first attempt of analyzing the gravitational-wave signal, the kilonova, and the gamma-ray burst afterglow simultaneously. Incorporating all available information, we estimate the radius of a 1.4M⊙ neutron star to be R = 11.9 8 − 0.40 + 0.35 km. The Nuclear-physics and Multi-Messenger Astrophysics framework, NMMA, combines multiple information from neutron stars and neutron star mergers. Here, the authors show an update of the NMMA framework to constrain neutron star equation of state by simultaneously analyzing multi-messenger observations.
- Subjects
STELLAR mergers; BINARY stars; ASTROPHYSICS; NEUTRON stars; NUCLEAR astrophysics; HUBBLE constant; EQUATIONS of state; GAMMA ray bursts
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-43932-6