期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 863, 期 2, 页码 -出版社
IOP Publishing Ltd
DOI: 10.3847/2041-8213/aad5de
关键词
binaries: close; nuclear reactions, nucleosynthesis, abundances; stars: neutron
资金
- U.S. Department of Energy (DOE) [DE-AC52-07NA27344, DE-SC0013039, DE-FG02-02ER41216, DE-SC0018232]
- National Nuclear Security Administration of the U.S. DOE at Los Alamos National Laboratory (LANL) [DE-AC52-06NA25396]
- National Aeronautics and Space Administration (NASA) through the Einstein Fellowship Program [PF7-180162]
- National Science Foundation [PHY-1430152]
Neutron star mergers offer unique conditions for the creation of the heavy elements, and additionally provide a testbed for our understanding of this synthesis known as the r-process. We have performed dynamical nucleosynthesis calculations and identified a single isotope, Cf-254, which has a particularly high impact on the brightness of electromagnetic transients associated with mergers on the order of 15 to 250 days. This is due to the anomalously long half-life of this isotope and the efficiency of fission thermalization compared to other nuclear channels. We estimate the fission fragment yield of this nucleus and outline the astrophysical conditions under which Cf-254. has the greatest impact to the light curve. Future observations in the mid-infrared, which are bright during this regime, could indicate the production of actinide nucleosynthesis.
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