| Autor: |
Jenny, Feige, Anton, Wallner, Randolf, Altmeyer, L Keith, Fifield, Robin, Golser, Silke, Merchel, Georg, Rugel, Peter, Steier, Stephen G, Tims, Stephan R, Winkler |
| Rok vydání: |
2018 |
| Zdroj: |
Physical review letters. 121(22) |
| ISSN: |
1079-7114 |
| Popis: |
We searched for the presence of ^{26}Al in deep-sea sediments as a signature of supernova influx. Our data show an exponential dependence of ^{26}Al with the sample age that is fully compatible with radioactive decay of terrigenic ^{26}Al. The same set of samples demonstrated a clear supernova ^{60}Fe signal between 1.7 and 3.2 Myr ago. Combining our ^{26}Al data with the recently reported ^{60}Fe data results in a lower limit of 0.18_{-0.08}^{+0.15} for the local interstellar ^{60}Fe/^{26}Al isotope ratio. It compares to most of the ratios deduced from nucleosynthesis models and is within the range of the observed average galactic ^{60}Fe/^{26}Al flux ratio of (0.15±0.05). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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