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Neutron Star Mergers and Nucleosynthesis of Heavy Elements

Thielemann, F. -K. and Eichler, M. and Panov, I. V. and Wehmeyer, B.. (2017) Neutron Star Mergers and Nucleosynthesis of Heavy Elements. Annual Review of Nuclear and Particle Science , 67. pp. 253-274.

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Official URL: https://edoc.unibas.ch/59235/

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Abstract

The existence of neutron star mergers has been supported since the discovery of the binary pulsar and the observation of its orbital energy loss, consistent with General Relativity. They are considered nucleosynthesis sites of the rapid neutron-capture process (r-process), which is responsible for creating approximately half of all heavy elements beyond Fe and is the only source of elements beyond Pb and Bi. Detailed nucleosynthesis calculations based on the decompression of neutron star matter are consistent with solar r-process abundances of heavy nuclei. Neutron star mergers have also been identified with short-duration gamma-ray bursts via their IR afterglow. The high neutron densities in ejected matter permit a violent r-process, leading to fission cycling of the heaviest nuclei in regions far from (nuclear) stability. Uncertainties in several nuclear properties affect the abundance distributions. The modeling of astrophysical events also depends on the hydrodynamic treatment, the occurrence of a neutrino wind after the merger and before the possible emergence of a black hole, and the properties of black hole accretion disks. We discuss the effect of nuclear and modeling uncertainties and conclude that binary compact mergers are probably a (or the) dominant site of the production of r-process nuclei in our Galaxy.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Astrophysik (Thielemann)
UniBasel Contributors:Thielemann, Friedrich-Karl and Wehmeyer, Benjamin
Item Type:Article, refereed
Article Subtype:Further Journal Contribution
Publisher:Annual Reviews
ISSN:0163-8998
e-ISSN:1545-4134
Note:Publication type according to Uni Basel Research Database: Journal item
Identification Number:
Last Modified:24 Jan 2018 11:22
Deposited On:24 Jan 2018 11:22

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