60Fe Anomaly in a Deep-Sea Manganese Crust and Implications for a Nearby Supernova Source

Details 60Fe Anomaly in a Deep-Sea Manganese Crust and Implications for a Nearby Supernova Source 60Fe Anomaly in a Deep-Sea Manganese Crust and Implications for a Nearby Supernova Source

Oct 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004phrvl..93q1103k&link_type=abstract

Physical Review Letters, vol. 93, Issue 17, id. 171103

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49

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A nearby supernova (SN) explosion in the past can be confirmed by the detection of radioisotopes on Earth that were produced and ejected by the SN. We have now measured a well resolved time profile of the 60Fe concentration in a deep-sea ferromanganese crust and found a highly significant increase 2.8Myr ago. The amount of 60Fe is compatible with the deposition of ejecta from a SN at a distance of a few 10pc. The well defined time of the SN explosion makes it possible to search for plausible correlations with other events in Earth’s history.

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