Deep-Ocean Crusts as Telescopes: Using Live Radioisotopes to Probe Supernova Nucleosynthesis

  title={Deep-Ocean Crusts as Telescopes: Using Live Radioisotopes to Probe Supernova Nucleosynthesis},
  author={Brian D. Fields and Kathrin A. Hochmuth and John Ellis},
  journal={The Astrophysical Journal},
  pages={902 - 907}
Live 60Fe has recently been detected in a deep-ocean ferromanganese crust, isolated in layers dating from about 3 Myr ago. Since 60Fe has a mean life of 2.2 Myr, a near-Earth supernova is the only likely source for such a signal, and we explore here the consequences of a supernova origin. We combine the 60Fe data with several supernova nucleosynthesis models to calculate the supernova distance as a function of progenitor mass, finding an allowed range of 15-120 pc. We also predict the signals… 

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60Fe anomaly in a deep-sea manganese crust and implications for a nearby supernova source.

A well resolved time profile of the 60Fe concentration in a deep-sea ferromanganese crust is measured and a highly significant increase 2.8 Myr ago is found.

Supernova Produced and Anthropogenic Pu in Deep Sea Manga- nese Encrustations

Could a nearby supernova explosion have caused a mass extinction?

  • J. EllisD. Schramm
  • Physics
    Proceedings of the National Academy of Sciences of the United States of America
  • 1995
It is examined the possibility that a nearby supernova explosion could have caused one or more of the mass extinctions identified by paleontologists, and the possible rate of such events is discussed.

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