Geological isotope anomalies as signatures of nearby supernovae
Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A num...
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ftcern:oai:cds.cern.ch:303599 2024-09-15T17:43:20+00:00 Geological isotope anomalies as signatures of nearby supernovae Ellis, John R. Fields, Brian D. Schramm, David N. 1996-05-20 https://doi.org/10.1086/177945 http://cds.cern.ch/record/303599 eng eng doi:10.1086/177945 http://cds.cern.ch/record/303599 astro-ph/9605128 FERMILAB-PUB-95-157-A CERN-TH-95-64 FERMILAB-PUB-95-157 oai:cds.cern.ch:303599 Astrophysics and Astronomy 1996 ftcern https://doi.org/10.1086/177945 2024-07-22T13:30:11Z Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A number of radioactive isotopes are identified as possible diagnostic tools, such as Be-10, Al-26, Cl-36, Mn-53, Fe-60, and Ni-59, as well as the longer-lived I-129, Sm-146, and Pu-244. We discuss whether the 35 and 60 kyr-old Be-10 anomalies observed in the Vostok antarctic ice cores could be due to supernova explosions. Combining our estimates for matter deposition with results of recent nucleosynthesis yields, we calculate the expected signal from nearby supernovae using ice cores back to \sim 300 kyr ago, and we discuss using deep ocean sediments back to several hundred Myr. In particular, we examine the prospects for identifying isotope anomalies due to the Geminga supernova explosion, and signatures of the possibility that supernovae might have caused one or more biological mass extinctions. Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A number of radioactive isotopes are identified as possible diagnostic tools, such as Be-10, Al-26, Cl-36, Mn-53, Fe-60, and Ni-59, as well as the longer-lived I-129, Sm-146, and Pu-244. We discuss whether the 35 and 60 kyr-old Be-10 anomalies observed in the Vostok antarctic ice cores could be due to supernova explosions. Combining our estimates for matter deposition with results of recent nucleosynthesis yields, we calculate the expected signal from nearby supernovae using ice cores back to $\sim 300$ kyr ago, and we discuss using deep ocean sediments back to several hundred Myr. In particular, we examine the prospects for identifying isotope ... Other/Unknown Material Antarc* Antarctic CERN Document Server (CDS) The Astrophysical Journal 470 1227 |
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English |
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Astrophysics and Astronomy |
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Astrophysics and Astronomy Ellis, John R. Fields, Brian D. Schramm, David N. Geological isotope anomalies as signatures of nearby supernovae |
topic_facet |
Astrophysics and Astronomy |
description |
Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A number of radioactive isotopes are identified as possible diagnostic tools, such as Be-10, Al-26, Cl-36, Mn-53, Fe-60, and Ni-59, as well as the longer-lived I-129, Sm-146, and Pu-244. We discuss whether the 35 and 60 kyr-old Be-10 anomalies observed in the Vostok antarctic ice cores could be due to supernova explosions. Combining our estimates for matter deposition with results of recent nucleosynthesis yields, we calculate the expected signal from nearby supernovae using ice cores back to \sim 300 kyr ago, and we discuss using deep ocean sediments back to several hundred Myr. In particular, we examine the prospects for identifying isotope anomalies due to the Geminga supernova explosion, and signatures of the possibility that supernovae might have caused one or more biological mass extinctions. Nearby supernova explosions may cause geological isotope anomalies via the direct deposition of debris or by cosmic-ray spallation in the earth's atmosphere. We estimate the mass of material deposited terrestrially by these two mechanisms, showing the dependence on the supernova distance. A number of radioactive isotopes are identified as possible diagnostic tools, such as Be-10, Al-26, Cl-36, Mn-53, Fe-60, and Ni-59, as well as the longer-lived I-129, Sm-146, and Pu-244. We discuss whether the 35 and 60 kyr-old Be-10 anomalies observed in the Vostok antarctic ice cores could be due to supernova explosions. Combining our estimates for matter deposition with results of recent nucleosynthesis yields, we calculate the expected signal from nearby supernovae using ice cores back to $\sim 300$ kyr ago, and we discuss using deep ocean sediments back to several hundred Myr. In particular, we examine the prospects for identifying isotope ... |
author |
Ellis, John R. Fields, Brian D. Schramm, David N. |
author_facet |
Ellis, John R. Fields, Brian D. Schramm, David N. |
author_sort |
Ellis, John R. |
title |
Geological isotope anomalies as signatures of nearby supernovae |
title_short |
Geological isotope anomalies as signatures of nearby supernovae |
title_full |
Geological isotope anomalies as signatures of nearby supernovae |
title_fullStr |
Geological isotope anomalies as signatures of nearby supernovae |
title_full_unstemmed |
Geological isotope anomalies as signatures of nearby supernovae |
title_sort |
geological isotope anomalies as signatures of nearby supernovae |
publishDate |
1996 |
url |
https://doi.org/10.1086/177945 http://cds.cern.ch/record/303599 |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
doi:10.1086/177945 http://cds.cern.ch/record/303599 astro-ph/9605128 FERMILAB-PUB-95-157-A CERN-TH-95-64 FERMILAB-PUB-95-157 oai:cds.cern.ch:303599 |
op_doi |
https://doi.org/10.1086/177945 |
container_title |
The Astrophysical Journal |
container_volume |
470 |
container_start_page |
1227 |
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1810490279407386624 |