The DOI matches its Crossref record; 29 of the 29 references it cites were found in a registry or an index.
PRODUCTION OF ALL THE r -PROCESS NUCLIDES IN THE DYNAMICAL EJECTA OF NEUTRON STAR MERGERS
Open accessAbstract
Recent studies suggest that binary neutron star (NS–NS) mergers robustly produce heavy r -process nuclei above the atomic mass number A ∼ 130 because their ejecta consist of almost pure neutrons (electron fraction of Y e < 0.1). However, the production of a small amount of the lighter r -process nuclei ( A ≈ 90–120) conflicts with the spectroscopic results of r -process-enhanced Galactic halo stars. We present, for the first time, the result of nucleosynthesis calculations based on the fully general relativistic simulation of a NS–NS merger with approximate neutrino transport. It is found that the bulk of the dynamical ejecta are appreciably shock-heated and neutrino processed, resulting in a wide range of Y e (≈0.09–0.45). The mass-averaged abundance distribution of calculated nucleosynthesis yields is in reasonable agreement with the full-mass range ( A ≈ 90–240) of the solar r -process curve. This implies, if our model is representative of such events, that the dynamical ejecta of NS–NS mergers could be the origin of the Galactic r -process nuclei. Our result also shows that radioactive heating after ∼1 day from the merging, which gives rise to r -process-powered transient emission, is dominated by the β-decays of several species close to stability with precisely measured half-lives. This implies that the total radioactive heating rate for such an event can be well constrained within about a factor of two if the ejected material has a solar-like r -process pattern.
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Cites
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Formation of Double Neutron Star Systems
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Identification of strontium in the merger of two neutron stars
Watson, D., Hansen, C. J., Selsing, J., Koch, A., Malesani, D. B., Andersen, A. C., Fynbo, J. P. U., Arcones, A., Bauswein, A., Covino, S., et al. (2019) · Nature · doi:10.1038/s41586-019-1676-3 · Cited by 482
Metadata
- Authors
- Wanajo, S., Sekiguchi, Y., Nishimura, N., Kiuchi, K., Kyutoku, K., & Shibata, M.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 2014-06-26
- Volume
- 789
- Issue
- 2
- Pages
- L39
- ISSN
- 2041-8205 (ISSN-L)
- 2041-8213
- OpenAlex
- W2106295983
- Cited by
- 623
- References
- 29
- FWCI
- 35.10
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Wanajo, S., Sekiguchi, Y., Nishimura, N., Kiuchi, K., Kyutoku, K., & Shibata, M. (2014). PRODUCTION OF ALL THE r -PROCESS NUCLIDES IN THE DYNAMICAL EJECTA OF NEUTRON STAR MERGERS. The Astrophysical Journal. https://doi.org/10.1088/2041-8205/789/2/l39
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