Abstract
An Fe60 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±0.4Myr ago. In an attempt to confirm this interpretation with better time resolution and obtain a more direct flux estimate, we measured Fe60 concentrations along a dated marine sediment. We find no Fe60 peak at the expected level from 1.7 to 3.2 Myr ago. Possible causes for the discrepancy are discussed.
| Original language | English |
|---|---|
| Article number | 121101 |
| Journal | Physical Review Letters |
| Volume | 101 |
| Issue number | 12 |
| DOIs | |
| Publication status | Published - 19 Sept 2008 |
| Externally published | Yes |
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