Cross correlation between cosmic‐ray fluctuations and interplanetary magnetic‐field fluctuations

J. Randy Jokipii; A. J. Owens

doi:10.1029/GL001i008p00329

Cross correlation between cosmic‐ray fluctuations and interplanetary magnetic‐field fluctuations

J. Randy Jokipii, A. J. Owens

Lunar and Planetary Lab

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

We present a study of the cross correlation between cosmic‐ray intensity fluctuations and the interplanetary magnetic field, using the low‐frequency limit of the theory of the interplanetary scintillations of cosmic rays. Cross‐spectral analysis of the flux of the Alert neutron monitor and simultaneous values of the interplanetary magnetic field components are presented which support the theory. A model of cosmic‐ray fluctuations is described, with effects of gradients and interplanetary sector structure dominating for very low frequencies (f ≲ 5×10⁻⁶Hz) and magnetic‐field induced interplanetary scintillations of cosmic rays dominating for higher frequencies.

Original language	English (US)
Pages (from-to)	329-332
Number of pages	4
Journal	Geophysical Research Letters
Volume	1
Issue number	8
DOIs	https://doi.org/10.1029/GL001i008p00329
State	Published - Dec 1974

ASJC Scopus subject areas

Geophysics
General Earth and Planetary Sciences

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author = "Jokipii, {J. Randy} and Owens, {A. J.}",

year = "1974",

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AU - Owens, A. J.

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AB - We present a study of the cross correlation between cosmic‐ray intensity fluctuations and the interplanetary magnetic field, using the low‐frequency limit of the theory of the interplanetary scintillations of cosmic rays. Cross‐spectral analysis of the flux of the Alert neutron monitor and simultaneous values of the interplanetary magnetic field components are presented which support the theory. A model of cosmic‐ray fluctuations is described, with effects of gradients and interplanetary sector structure dominating for very low frequencies (f ≲ 5×10−6Hz) and magnetic‐field induced interplanetary scintillations of cosmic rays dominating for higher frequencies.

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JO - Geophysical Research Letters

JF - Geophysical Research Letters

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Cross correlation between cosmic‐ray fluctuations and interplanetary magnetic‐field fluctuations

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