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The Search for Supernova-Produced Radionuclides in Terrestrial Deep-Sea Archives

  • J. Feige (a1), A. Wallner (a1) (a2) (a3), S. R. Winkler (a1), S. Merchel (a4), L. K. Fifield (a2), G. Korschinek (a5), G. Rugel (a4) and D. Breitschwerdt (a6)...
Abstract
Abstract

An enhanced concentration of 60Fe was found in a deep ocean crust in 2004 in a layer corresponding to an age of ∼2 Myr. The confirmation of this signal in terrestrial archives as supernova-induced and the detection of other supernova-produced radionuclides is of great interest. We have identified two suitable marine sediment cores from the South Australian Basin and estimated the intensity of a possible signal of the supernova-produced radionuclides 26Al, 53Mn, 60Fe, and the pure r-process element 244Pu in these cores. The finding of these radionuclides in a sediment core might allow us to improve the time resolution of the signal and thus to link the signal to a supernova event in the solar vicinity ∼2 Myr ago. Furthermore, it gives us an insight into nucleosynthesis scenarios in massive stars, condensation into dust grains and transport mechanisms from the supernova shell into the solar system.

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Copyright
Corresponding author
GCorresponding author. Email: jenny.feige@univie.ac.at
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