Limits on Supernova-Associated Fe 60/Al 26 Nucleosynthesis Ratios from Accelerator Mass Spectrometry Measurements of Deep-Sea Sediments

Jenny Feige; Anton Wallner; Randolf Altmeyer; L. Keith Fifield; Robin Golser; Silke Merchel; Georg Rugel; Peter Steier; Stephen G. Tims; Stephan R. Winkler

doi:10.1103/PhysRevLett.121.221103

Limits on Supernova-Associated Fe 60/Al 26 Nucleosynthesis Ratios from Accelerator Mass Spectrometry Measurements of Deep-Sea Sediments

Jenny Feige, Anton Wallner, Randolf Altmeyer, L. Keith Fifield, Robin Golser, Silke Merchel, Georg Rugel, Peter Steier, Stephen G. Tims, Stephan R. Winkler

Research output: Contribution to journal › Article › peer-review

25 Citations (Scopus)

Abstract

We searched for the presence of Al26 in deep-sea sediments as a signature of supernova influx. Our data show an exponential dependence of Al26 with the sample age that is fully compatible with radioactive decay of terrigenic Al26. The same set of samples demonstrated a clear supernova Fe60 signal between 1.7 and 3.2 Myr ago. Combining our Al26 data with the recently reported Fe60 data results in a lower limit of 0.18-0.08+0.15 for the local interstellar Fe60/Al26 isotope ratio. It compares to most of the ratios deduced from nucleosynthesis models and is within the range of the observed average galactic Fe60/Al26 flux ratio of (0.15±0.05).

Original language	English
Article number	221103
Journal	Physical Review Letters
Volume	121
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevLett.121.221103
Publication status	Published - 27 Nov 2018

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Feige, J., Wallner, A., Altmeyer, R., Fifield, L. K., Golser, R., Merchel, S., Rugel, G., Steier, P., Tims, S. G., & Winkler, S. R. (2018). Limits on Supernova-Associated Fe 60/Al 26 Nucleosynthesis Ratios from Accelerator Mass Spectrometry Measurements of Deep-Sea Sediments. Physical Review Letters, 121(22), Article 221103. https://doi.org/10.1103/PhysRevLett.121.221103

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title = "Limits on Supernova-Associated Fe 60/Al 26 Nucleosynthesis Ratios from Accelerator Mass Spectrometry Measurements of Deep-Sea Sediments",

abstract = "We searched for the presence of Al26 in deep-sea sediments as a signature of supernova influx. Our data show an exponential dependence of Al26 with the sample age that is fully compatible with radioactive decay of terrigenic Al26. The same set of samples demonstrated a clear supernova Fe60 signal between 1.7 and 3.2 Myr ago. Combining our Al26 data with the recently reported Fe60 data results in a lower limit of 0.18-0.08+0.15 for the local interstellar Fe60/Al26 isotope ratio. It compares to most of the ratios deduced from nucleosynthesis models and is within the range of the observed average galactic Fe60/Al26 flux ratio of (0.15±0.05).",

author = "Jenny Feige and Anton Wallner and Randolf Altmeyer and Fifield, {L. Keith} and Robin Golser and Silke Merchel and Georg Rugel and Peter Steier and Tims, {Stephen G.} and Winkler, {Stephan R.}",

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doi = "10.1103/PhysRevLett.121.221103",

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AU - Feige, Jenny

AU - Wallner, Anton

AU - Altmeyer, Randolf

AU - Fifield, L. Keith

AU - Golser, Robin

AU - Merchel, Silke

AU - Rugel, Georg

AU - Steier, Peter

AU - Tims, Stephen G.

AU - Winkler, Stephan R.

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AB - We searched for the presence of Al26 in deep-sea sediments as a signature of supernova influx. Our data show an exponential dependence of Al26 with the sample age that is fully compatible with radioactive decay of terrigenic Al26. The same set of samples demonstrated a clear supernova Fe60 signal between 1.7 and 3.2 Myr ago. Combining our Al26 data with the recently reported Fe60 data results in a lower limit of 0.18-0.08+0.15 for the local interstellar Fe60/Al26 isotope ratio. It compares to most of the ratios deduced from nucleosynthesis models and is within the range of the observed average galactic Fe60/Al26 flux ratio of (0.15±0.05).

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Limits on Supernova-Associated Fe 60/Al 26 Nucleosynthesis Ratios from Accelerator Mass Spectrometry Measurements of Deep-Sea Sediments

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