| Issue |
A&A
Volume 499, Number 2, May IV 2009
|
|
|---|---|---|
| Page(s) | 601 - 613 | |
| Section | Planets and planetary systems | |
| DOI | https://doi.org/10.1051/0004-6361/200811213 | |
| Published online | 05 March 2009 | |
Detection of real periodicity in the terrestrial impact crater record: quantity and quality requirements
Observatory, PO Box 14, 00014 University of Helsinki, Finland e-mail: joonas.lyytinen@iki.fi
Received:
22
October
2008
Accepted:
30
January
2009
Aims. To determine the quantity and quality requirements for the terrestrial impact crater data which would allow reliable detection of real periodicity.
Methods. Artificial impact crater data samples of different size and accuracy are simulated. Erosion is considered, as well as the effect of the unknown ratio between periodic and aperiodic impacts. The probabilities for detecting real and false periodicities are solved with the Rayleigh test from these simulated data.
Results. Reliable detection of real periodicity is currently impossible – unless all impacts on Earth have been periodic.
Key words: Earth / minor planets, asteroids / Oort cloud / methods: statistical / Galaxy: solar neighborhood / comets: general
© ESO, 2009
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