Periodic mass extinctions and the Planet X model reconsidered

@article{Whitmire2015PeriodicME,
  title={Periodic mass extinctions and the Planet X model reconsidered},
  author={Daniel P. Whitmire},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2015},
  volume={455}
}
  • D. Whitmire
  • Published 11 October 2015
  • Physics, Geology
  • Monthly Notices of the Royal Astronomical Society
The 27 Myr periodicity in the fossil extinction record has been confirmed in modern data bases dating back 500 Myr, which is twice the time interval of the original analysis from thirty years ago. The surprising regularity of this period has been used to reject the Nemesis model. A second model based on the sun's vertical galactic oscillations has been challenged on the basis of an inconsistency in period and phasing. The third astronomical model originally proposed to explain the periodicity… 

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Comments on: Periodicity in the extinction rate and possible astronomical causes – comment on mass extinctions over the last 500 myr: an astronomical cause? (Erlykin et al.)

COMMENTS ON: PERIODICITY IN THE EXTINCTION RATE AND POSSIBLE ASTRONOMICAL CAUSES – COMMENT ON MASS EXTINCTIONS OVER THE LAST 500 MYR: AN ASTRONOMICAL CAUSE? (ERLYKIN ET AL.) by ADRIAN L. MELOTT and

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References

SHOWING 1-10 OF 26 REFERENCES

Periodic comet showers and planet X

The discovery1 that Pluto's mass is insufficient to explain the discrepancies in the motions of the outer planets has led to the prediction of a tenth planet (planet X) of mass ∼1–5 M⊕ beyond the

Are periodic mass extinctions driven by a distant solar companion?

Raup and Sepkoski1–3 have recently reported evidence for a 26-Myr cycle in biological mass extinctions which, if real, requires an astronomical explanation. Here we investigate a model in which this

How stable is an astronomical clock that can trigger mass extinctions on Earth?

  • P. Hut
  • Physics, Geology
    Nature
  • 1984
The periodicity in mass extinctions observed in the fossil record1,2 may be driven by an astronomical clock consisting of a companion star to the Sun3,4. Each perihelion passage of the companion star

Extinction of species by periodic comet showers

A 26-Myr periodicity has recently been seen in the fossil record of extinction in the geological past1. At least two of these extinctions are known to be associated with the impact on the Earth of a

Planet X and the origins of the shower and steady state flux of short-period comets

Nemesis reconsidered: Nemesis reconsidered

TLDR
This work examines the evidence for the previously proposed periodicity of a companion object orbiting the Sun, using two modern, greatly improved paleontological datasets of fossil biodiversity, and finds that there is a narrow peak at 27 My in the cross-spectrum of extinction intensity time series between these independent datasets.

Dynamical limits on dark mass in the outer solar system

Simplified model solar systems with known observational errors are considered in conducting a dynamical search for dark mass and its minimum detectable amount, and in determining the significance of

AN OUTER PLANET BEYOND PLUTO AND THE ORIGIN OF THE TRANS-NEPTUNIAN BELT ARCHITECTURE

Trans-Neptunian objects (TNOs) are remnants of a collisionally and dynamically evolved planetesimal disk in the outer solar system. This complex structure, known as the trans-Neptunian belt (or

Constraints on the Acceleration of the Solar System from High-Precision Timing

Many astronomers have speculated that the solar system contains undiscovered massive planets or a distant stellar companion. The acceleration of the solar system barycenter can constrain the mass and

Disc dark matter in the Galaxy and potential cycles of extraterrestrial impacts, mass extinctions and geological events

A cycle in the range of 26–30Myr has been reported in mass extinctions, and terrestrial impact cratering may exhibit a similar cycle of 31 ± 5Myr. These cycles have been attributed to the Sun’s