Phys. Rev. Lett. 89, 051102 (2002) [4 pages]Cosmic Ray Diffusion from the Galactic Spiral Arms, Iron Meteorites, and a Possible Climatic ConnectionSee Also: Publisher's Note
We construct a Galactic cosmic ray (CR) diffusion model. The CR flux reaching the Solar System should periodically increase with each crossing of a Galactic spiral arm. We confirm this prediction in the CR exposure age record of iron meteorites. We also find that although the geological evidence for the occurrence of ice-age epochs in the past eon is not unequivocal, it appears to have a nontrivial correlation with the spiral arm crossings and the CR flux variability—agreeing in period and phase. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.89.051102
DOI:
10.1103/PhysRevLett.89.051102
PACS:
98.35.Hj, 92.40.Cy, 92.70.Gt, 98.70.Sa
See AlsoPublisher's Note: Nir J. Shaviv, Publisher’s Note: Cosmic Ray Diffusion from the Galactic Spiral Arms, Iron Meteorites, and a Possible Climatic Connection [Phys. Rev. Lett. 89, 051102 (2002)], Phys. Rev. Lett. 89, 089901 (2002). |
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