Meteorites have inherited nucleosynthetic anomalies of potassium-40 produced in supernovae | Zendy

Nicole X. Nie | Zendy; Wang Da | Zendy; Z. A. Torrano | Zendy; Richard W. Carlson | Zendy; Conel M. O'd. Alexander | Zendy; Anat Shahar | Zendy

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Meteorites have inherited nucleosynthetic anomalies of potassium-40 produced in supernovae

Author(s) -

Nicole X. Nie,

Wang Da,

Z. A. Torrano,

Richard W. Carlson,

Conel M. O'd. Alexander,

Anat Shahar

Publication year - 2023

Publication title -

science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 12.556

H-Index - 1186

eISSN - 1095-9203

pISSN - 0036-8075

DOI - 10.1126/science.abn1783

Subject(s) - meteorite , supernova , potassium , astrobiology , astrophysics , chemistry , physics , organic chemistry

Meteorites record processes that occurred before and during the formation of the Solar System in the form of nucleosynthetic anomalies: isotopic compositions that differ from the Solar System patterns. Nucleosynthetic anomalies are rarely seen in volatile elements such as potassium at bulk meteorite scale. We measured potassium isotope ratios in 32 meteorites and identified nucleosynthetic anomalies in the isotope potassium-40. The anomalies are larger and more variable in carbonaceous chondrite (CC) meteorites than in noncarbonaceous (NC) meteorites, indicating that CCs inherited more material produced in supernova nucleosynthesis. The potassium-40 anomaly of Earth is close to that of the NCs, implying that Earth's potassium was mostly delivered by NCs.

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