Cosmic Ray Diffusion from the Galactic Spiral Arms, Iron Meteorites, and a Possible Climatic Connection
- 16 July 2002
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 89 (5), 051102
- https://doi.org/10.1103/physrevlett.89.051102
Abstract
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.Keywords
This publication has 27 references indexed in Scilit:
- The 36Cl–36Ar–40K–41K records and cosmic ray production rates in iron meteoritesEarth and Planetary Science Letters, 1999
- Why are supernovae in our Galaxy so frequent?Monthly Notices of the Royal Astronomical Society, 1999
- Memoir 192: Pre-Mesozoic Ice Ages: Their Bearing on Understanding the Climate SystemPublished by Geological Society of America ,1999
- A Study of the Surviving Fraction of the Cosmic‐Ray Radioactive Decay Isotopes10Be,26Al,36Cl and54Mn as a Function of Energy Using the Charge Ratios Be/B, Al/Mg, Cl/Ar, and Mn/Fe Measured onHEAO 3The Astrophysical Journal, 1998
- Constraints on cosmic ray propagation from radio continuum data of NGC 2146Monthly Notices of the Royal Astronomical Society, 1996
- High Energy AstrophysicsPublished by Cambridge University Press (CUP) ,1994
- The isotopic composition of cosmic-ray beryllium and its implication for the cosmic ray's ageThe Astrophysical Journal, 1994
- Pulsar distances and the galactic distribution of free electronsThe Astrophysical Journal, 1993
- Climate Modes of the PhanerozoicPublished by Cambridge University Press (CUP) ,1992
- On the Spiral Structure of Disk Galaxies. III. Comparison with ObservationsThe Astrophysical Journal, 1969