PIRSA:17020094

Video URL

https://pirsa.org/17020094

Radioactive Iron Rain: Evidence of a Recent Nearby Supernova Explosion

Ellis, J. (2017). Radioactive Iron Rain: Evidence of a Recent Nearby Supernova Explosion. Perimeter Institute for Theoretical Physics. https://pirsa.org/17020094

Ellis, John. Radioactive Iron Rain: Evidence of a Recent Nearby Supernova Explosion. Perimeter Institute for Theoretical Physics, Feb. 07, 2017, https://pirsa.org/17020094 

          @misc{ scivideos_PIRSA:17020094,
            doi = {10.48660/17020094},
            url = {https://pirsa.org/17020094},
            author = {Ellis, John},
            keywords = {Particle Physics},
            language = {en},
            title = {Radioactive Iron Rain: Evidence of a Recent Nearby Supernova Explosion},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {feb},
            note = {PIRSA:17020094 see, \url{https://scivideos.org/pirsa/17020094}}
          }

John Ellis European Organization for Nuclear Research (CERN)

Talk numberPIRSA:17020094
DOI10.48660/17020094
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

A very close supernova explosion could have caused a mass extinction

of life in Earth. In 1996, Brian Fields, the late Dave Schramm and the
speaker proposed looking for unstable isotopes such as Iron 60 that could
have been deposited by a recent nearby supernova explosion. A group from
the Technical University of Munich has discovered Iron 60 in deep-ocean
sediments and ferromanganese crusts due to one or more supernovae that
exploded O(100) parsecs away about 2.5 million years ago. These results
have recently been confirmed by a group from the Australian National
University, and the Munich group has also discovered supernova Iron 60 in
lunar rock samples and in microfossils of magnetotactic bacteria. 
This colloquium will discuss the data and their interpretation
in terms of supernova models, and the possible implications for
life on Earth.