The Link Between the Local Bubble and Radioisotopic Signatures on Earth

Feige, Jenny; Breitschwerdt, Dieter; Wallner, Anton; Schulreich, Michael M.; Kinoshita, Norikazu; Paul, Michael; Dettbarn, Christian; Fifield, Keith L.; Golser, Robin; Honda, Maki; Linnemann, Ulf; Matsuzaki, Hiroyuki; Merchel, Silke; Rugel, Georg; Steier, Peter; Tims, Stephen G.; Winkler, Stephan R.; Yamagata, Takeyasu

The Link Between the Local Bubble and Radioisotopic Signatures on Earth

Feige, J.; Breitschwerdt, D.; Wallner, A.; Schulreich, M. M.; Kinoshita, N.; Paul, M.; Dettbarn, C.; Fifield, K. L.; Golser, R.; Honda, M.; Linnemann, U.; Matsuzaki, H.; Merchel, S.; Rugel, G.; Steier, P.; Tims, S. G.; Winkler, S. R.; Yamagata, T.

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.

Keywords: supernova; AMS; radionuclide; local bubble; deep-sea samples; interstellar medium; accelerator mass spectrometry

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Ionenstrahlzentrum DOI: 10.17815/jlsrf-3-159

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DOI: 10.17815/jlsrf-3-159 is cited by this (Id 24036) publication

Beitrag zu Proceedings
14th International Symposium on Nuclei in the Cosmos XIV, 19.-24.06.2016, Toki Messe, Niigata, Japan
Proceedings of the 14th International Symposium on Nuclei in the Cosmos XIV, JPS Conf. Proc. 14 (2017): JPS (Japan Physical Society) Conference Proceeding, 010304
DOI: 10.7566/JPSCP.14.010304

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