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.
Jenny Feige, Dieter Breitschwerdt, Anton Wallner, Michael M. Schulreich, Norikazu Kinoshita, Michael Paul, Christian Dettbarn, L. Keith Fifield, Robin Golser, Maki Honda, Ulf Linnemann, Hiroyuki Matsuzaki, Silke Merchel, Georg Rugel, Peter Steier, Stephen G. Tims, Stephan R. Winkler, Takeyasu Yamagata
(Submitted on 4 Nov 2016)
Comments: 4 pages, 3 figures, accepted for publication in JPS Conf. Proc
Subjects: Earth and Planetary Astrophysics (astro-ph.EP); Solar and Stellar Astrophysics (astro-ph.SR)
Cite as: arXiv:1611.01431 [astro-ph.EP] (or arXiv:1611.01431v1 [astro-ph.EP] for this version)
From: Jenny Feige [view email]
[v1] Fri, 4 Nov 2016 15:59:59 GMT (666kb,D)
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