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Mass ejection from neutron-star mergers

Published online by Cambridge University Press:  20 January 2023

Masaru Shibata Open the ORCID record for Masaru Shibata [Opens in a new window] ,
Sho Fujibayashi ,
Kota Hayashi ,
Kenta Kiuchi  and
Shinya Wanajo
Masaru Shibata
Affiliation:
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), am Mühlenberg 1, Potsdam-Golm D-14476, Germany email: mshibata@aei.mpg.de Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
Sho Fujibayashi
Affiliation:
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), am Mühlenberg 1, Potsdam-Golm D-14476, Germany email: mshibata@aei.mpg.de
Kota Hayashi
Affiliation:
Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
Kenta Kiuchi
Affiliation:
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), am Mühlenberg 1, Potsdam-Golm D-14476, Germany email: mshibata@aei.mpg.de Center for Gravitational Physics, Yukawa Institute for Theoretical Physics, Kyoto University, Kyoto 606-8502, Japan
Shinya Wanajo
Affiliation:
Max Planck Institute for Gravitational Physics (Albert Einstein Institute), am Mühlenberg 1, Potsdam-Golm D-14476, Germany email: mshibata@aei.mpg.de
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Abstract

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Merger of binary neutron stars and black hole-neutron star binaries is the promising source of short-hard gamma-ray bursts, the most promising site for the r-process nucleosynthesis, and the source of kilonovae. To theoretically predict the merger and mass ejection processes and resulting electromagnetic emission, numerical simulation in full general relativity (numerical relativity) is the unique approach. We summarize our current understanding for the processes of neutron-star mergers and subsequent mass ejection based on the results of long-term numerical-relativity simulations. We pay particular attention to the electron fraction of the ejecta.

Keywords

Neutron-star mergerKilonovaeNumerical RelativityNucleosynthesis
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 16 , Symposium S362: The Predictive Power of Computational Astrophysics as a Discovery Tool , June 2020 , pp. 190 - 202
Copyright
© The Author(s), 2023. Published by Cambridge University Press on behalf of International Astronomical Union

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