The Link Between the Local Bubble and Radioisotopic Signatures on Earth
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Feige, J.
Breitschwerdt, Dieter
Wallner, Anton
Schulreich, Michael M.
Kinoshita, Norikazu
Paul, Michael
Dettbarn, C.
Fifield, L. Keith
Golser, Robin
Honda, Maki
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Japan Physical Society
Abstract
Traces of 2-3 Myr old 60Fe were recently discovered in a manganese crust and in lunar samples. We have found that this signal is extended in time and is present in globally distributed deep-sea archives. A second 6.5-8.7 Myr old signature was revealed in a manganese crust. The existence of the Local Bubble hints to a recent nearby supernova-activity starting 13 Myr ago. With analytical and numerical models generating the Local Bubble, we explain the younger 60Fe-signature and thus link the evolution of the solar neighborhood to terrestrial anomalies.
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Proceedings of the 14th International Symposium on the Nuclei of the Cosmos
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