Search for supernova-produced Fe-60 in a marine sediment

Autor(en)

C Fitoussi, G M Raisbeck, Klaus Knie, Gunther Korschinek, Thomas Faestermann, Stéphane Goriely, D Lunney, Mikhail Poutivtsev, Georg Rugel, M Waelbroeck, Anton Wallner

Abstrakt

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 [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 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.

Organisation(en)

Isotopenphysik

Externe Organisation(en)

Université Paris XI - Paris-Sud, Technische Universität München, Universität Wien, Laboratoire des Sciences du Climat et de l'Environment, Université Libre de Bruxelles

Journal

Physical Review Letters

Band

101

Anzahl der Seiten

4

ISSN

0031-9007

DOI

https://doi.org/10.1103/PhysRevLett.101.121101

Publikationsdatum

2008

Peer-reviewed

Ja

ÖFOS 2012

1030 Physik, Astronomie

Sustainable Development Goals

SDG 14 – Leben unter Wasser

Link zum Portal

https://ucris.univie.ac.at/portal/de/publications/search-for-supernovaproduced-fe60-in-a-marine-sediment(2c60562c-b23e-4e9a-bbb9-1065e79e6b86).html