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- W2242359428 abstract "Measurements of the radioactive $^{244}$Pu abundances can break the degeneracy between high-rate/low-yield and low-rate/high-yield scenarios for the production of heavy $r$-process elements. The first corresponds to production by core collapse supernovae (cc-SNe) while the latter corresponds to production by e.g. compact binary mergers. The estimated $^{244}$Pu abundance in the current interstellar medium inferred from deep-sea measurements (Wallner et al. 2015) is significantly lower than that corresponding Early Solar System abundances (Turner et al 2007). We estimate the expected median value of the $^{244}$Pu abundances and fluctuations around this value in both models. We show that while the current and Early Solar System abundances are naturally explained within the low-rate/high-yield (e.g. merger) scenario, they are incompatible with the high-rate/low-yield (cc-SNe) model. The inferred event rate remarkably agrees with compact binary merger rates estimated from Galactic neutron star binaries and from short gamma-ray bursts. Furthermore, the ejected mass of $r$-process elements per event agrees with both theoretical and observational macronova/kilonova estimates." @default.
- W2242359428 created "2016-06-24" @default.
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- W2242359428 date "2015-12-01" @default.
- W2242359428 modified "2023-10-14" @default.
- W2242359428 title "Short-lived 244Pu points to compact binary mergers as sites for heavy r-process nucleosynthesis" @default.
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- W2242359428 doi "https://doi.org/10.1038/nphys3574" @default.
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