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On the causes of spectral enhancements in solar wind power spectraEnhancements in power spectra of the solar-wind ion flux in the frequency neighborhood of 0.5 Hz had been noted by Unti et al. (1973). It was speculated that these were due to convected small-scale density irregularities. In this paper, 54 flux spectra calculated from OGO 5 data are examined. It is seen that the few prominent spectral peaks which occur were not generated by density irregularities, but were due to several different causes, including convected discontinuities and propagating transverse waves. A superposition of many spectra, however, reveals a moderate enhancement at a frequency corresponding to convected features with a correlation length of a proton gyroradius, consistent with the results of Neugebauer (1975).
Document ID
19760039115
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Unti, T.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena Calif., United States)
Russell, C. T.
(California, University Los Angeles, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1976
Publication Information
Publication: Journal of Geophysical Research
Volume: 81
Subject Category
Solar Physics
Accession Number
76A22081
Funding Number(s)
CONTRACT_GRANT: NAS7-100
Distribution Limits
Public
Copyright
Other

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