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  Investigating GW190425 with numerical-relativity simulations

Dudi, R., Adhikari, A., Brügmann, B., Dietrich, T., Hayashi, K., Kawaguchi, K., et al. (in preparation). Investigating GW190425 with numerical-relativity simulations.

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 Creators:
Dudi, Reetika1, Author              
Adhikari, Ananya, Author
Brügmann, Bernd, Author
Dietrich, Tim1, 2, Author              
Hayashi, Kota, Author
Kawaguchi, Kyohei, Author
Kiuchi, Kenta, Author
Kyutoku, Koutarou, Author
Shibata, Masaru, Author
Tichy, Wolfgang, Author
Affiliations:
1Astrophysical and Cosmological Relativity, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_1933290              
2Multi-messenger Astrophysics of Compact Binaries, AEI-Golm, MPI for Gravitational Physics, Max Planck Society, ou_3329942              

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Free keywords: Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc
 Abstract: The third observing run of the LIGO-Virgo collaboration has resulted in about hundred gravitational-wave triggers including the binary neutron star merger GW190425. However, none of these events have been accompanied with an electromagnetic transient found during extensive follow-up searches. In this article, we perform new numerical-relativity simulations of binary neutron star and black hole - neutron star systems that have a chirp mass consistent with GW190425. Assuming that the GW190425's sky location was covered with sufficient accuracy during the electromagnetic follow-up searches, we investigate whether the non-detection of the kilonova is compatible with the source parameters estimated through the gravitational-wave analysis and how one can use this information to place constraints on the properties of the system. Our simulations suggest that GW190425 is incompatible with an unequal mass binary neutron star merger with a mass ratio $q<0.8$ when considering stiff or moderately stiff equations of state if the binary was face-on and covered by the observation. Our analysis shows that a detailed observational result for kilonovae will be useful to constrain the mass ratio of binary neutron stars in future events.

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 Dates: 2021-09-09
 Publication Status: Not specified
 Pages: 10 pages, 7 figures
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: arXiv: 2109.04063
 Degree: -

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