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The power spectrum of the solar wind speed for periods greater than 10 daysThe use of the more than 11 years of solar wind speed data obtained by Vela 2-6 and Imp 6-8 to study the power spectrum of speed variations in the range near the solar rotational frequency is discussed. The broad bands of power near periods of 27 days (corresponding to the rotational period of the sun), 13.5 days, and higher harmonics are characterized, and it is suggested that the described individual peaks in both the solar wind and the geomagnetic spectra are probably not due to differential rotation. The alternate explanation is that the multipeak nature of the power spectra are explained by a wave packet concept in which recurring highspeed streams are described as a series of pulses (separated by a constant period) that last for a varying number of solar rotations.
Document ID
19780068614
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Fenimore, E. E.
(Los Alamos Scientific Lab. NM, United States)
Asbridge, J. R.
(Los Alamos Scientific Lab. NM, United States)
Bame, S. J.
(Los Alamos Scientific Lab. NM, United States)
Feldman, W. C.
(Los Alamos Scientific Lab. NM, United States)
Gosling, J. T.
(California, University Los Alamos Scientific Laboratory, Los Alamos, N. Mex., United States)
Date Acquired
August 9, 2013
Publication Date
September 1, 1978
Publication Information
Publication: Journal of Geophysical Research
Volume: 83
Subject Category
Solar Physics
Accession Number
78A52523
Funding Number(s)
CONTRACT_GRANT: NASA ORDER S-57094-A
Distribution Limits
Public
Copyright
Other

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