Low-Frequency 1/f Noise in the Interplanetary Magnetic Field
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Citation of Original Publication
Matthaeus, W. H., and M. L. Goldstein. “Low-Frequency $\frac{1}{f}$ Noise in the Interplanetary Magnetic Field.” Physical Review Letters 57, no. 4 (July 28, 1986): 495–98. https://doi.org/10.1103/PhysRevLett.57.495.
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This work was written as part of one of the author's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.
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Abstract
Spacecraft observations of the interplanetary magnetic field at 1 AU (astronomical unit) are shown to have frequency spectra with a 1/f
dependence in the range 2.7 × 10⁻⁶
to 8.0 × 10⁻⁵
Hz. We suggest that the
1/f spectrum results from the superposition of uncorrelated samples of solar surface turbulence that have log-normal distributions of correlation lengths corresponding to a scale-invariant distribution of correlation times over an appropriate range of parameters.