Hypothesis: Muon Radiation Dose and Marine Megafaunal Extinction at the End-Pliocene Supernova.

@article{Melott2017HypothesisMR,
  title={Hypothesis: Muon Radiation Dose and Marine Megafaunal Extinction at the End-Pliocene Supernova.},
  author={Adrian L. Melott and F. Marinho and Laura Paulucci},
  journal={Astrobiology},
  year={2017},
  volume={19 6},
  pages={
          825-830
        }
}
Considerable data and analysis support the detection of one or more supernovae (SNe) at a distance of about 50 pc, ∼2.6 million years ago. This is possibly related to the extinction event around that time and is a member of a series of explosions that formed the Local Bubble in the interstellar medium. We build on previous work, and propagate the muon flux from SN-initiated cosmic rays from the surface to the depths of the ocean. We find that the radiation dose from the muons will exceed the… 
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References

SHOWING 1-10 OF 55 REFERENCES

A Supernova at 50 pc: Effects on the Earth's Atmosphere and Biota

A substantial increase is suggested in the extended effects of supernovae on Earth and in the "lethal distance" estimate; though more work is needed.

Stellar astrophysics: Supernovae in the neighbourhood

Detailed measurements of radioisotopes in deep-sea deposits, plus modelling of how they reached Earth, indicate that many supernovae have occurred near enough to have potentially influenced evolution, and suggest there have been multiple supernova within a few hundred light years, over the past few million years.

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.

Recent near-Earth supernovae probed by global deposition of interstellar radioactive 60Fe

The findings indicate multiple supernova and massive-star events during the last ten million years at distances of up to 100 parsecs, which indicates that a few per cent of fresh 60Fe was captured in dust and deposited on Earth.

Time-resolved 2-million-year-old supernova activity discovered in Earth’s microfossil record

A time-resolved 60Fe signal residing, at least partially, in a biogenic reservoir is reported through the direct detection of live 60Fe atoms contained within secondary iron oxides, among which are magnetofossils, the fossilized chains of magnetite crystals produced by magnetotactic bacteria.

The Local Bubble in the interstellar medium and the origin of the low energy cosmic rays

The locations of recent supernovae near the Sun from modelling 60Fe transport

Calculations of the most probable trajectories and masses of the supernova progenitors, and hence their explosion times and sites, are reported and the model reproduces the measured relative abundances very well.

Interstellar ^{60}Fe on the Surface of the Moon.

The concentration of the cosmic ray produced isotope ^{53}Mn, measured in the same samples, proves the supernova origin of the ^{60}Fe and deduces a reliable value for the local interstellar fluence in the range of 1×10^{8}  at/cm^{2}.

Ozone Depletion from Nearby Supernovae

Estimates made in the 1970s indicated that a supernova occurring within tens of parsecs of Earth could have significant effects on the ozone layer. Since that time, improved tools for detailed…

Propagation and energy deposition of cosmic rays’ muons on terrestrial environments

Abstract The Earth is constantly struck by radiation coming from the interstellar medium. The very low energy end of the spectrum is shielded by the geomagnetic field but charged particles with…
...