Search for Supernova-Produced in a Marine Sediment
C Fitoussi, GM Raisbeck, K Knie, G Korschinek… - Physical Review Letters, 2008 - APS
Physical Review Letters, 2008•APS
An Fe 60 peak in a deep-sea FeMn crust has been interpreted as due to the signature left by
the ejecta of a supernova explosion close to the solar system 2.8±0.4 Myr ago [Knie, Phys.
Rev. Lett. 93, 171103 (2004) PRLTAO 0031-9007 10.1103/PhysRevLett. 93.171103]. In an
attempt to confirm this interpretation with better time resolution and obtain a more direct flux
estimate, we measured Fe 60 concentrations along a dated marine sediment. We find no Fe
60 peak at the expected level from 1.7 to 3.2 Myr ago. Possible causes for the discrepancy …
the ejecta of a supernova explosion close to the solar system 2.8±0.4 Myr ago [Knie, Phys.
Rev. Lett. 93, 171103 (2004) PRLTAO 0031-9007 10.1103/PhysRevLett. 93.171103]. In an
attempt to confirm this interpretation with better time resolution and obtain a more direct flux
estimate, we measured Fe 60 concentrations along a dated marine sediment. We find no Fe
60 peak at the expected level from 1.7 to 3.2 Myr ago. Possible causes for the discrepancy …
An peak in a deep-sea FeMn crust has been interpreted as due to the signature left by the ejecta of a supernova explosion close to the solar system ago [Knie , Phys. Rev. Lett. 93, 171103 (2004)PRLTAO0031-900710.1103/PhysRevLett.93.171103]. In an attempt to confirm this interpretation with better time resolution and obtain a more direct flux estimate, we measured concentrations along a dated marine sediment. We find no peak at the expected level from 1.7 to 3.2 Myr ago. Possible causes for the discrepancy are discussed.
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