Measurements of Rapid Density Fluctuations in the Solar Wind

Details Measurements of Rapid Density Fluctuations in the Solar Wind Measurements of Rapid Density Fluctuations in the Solar Wind

Mar 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010apj...711..322m&link_type=abstract

The Astrophysical Journal, Volume 711, Issue 1, pp. 322-327 (2010).

Astronomy and Astrophysics

Astronomy

3

Interplanetary Medium, Methods: Data Analysis, Turbulence

Scientific paper

The power spectrum of density fluctuations in the solar wind is inferred by tracking small timescale changes in the electron plasma frequency during periods of strong Langmuir wave activity. STEREO electric field waveform data are used to produce time profiles of plasma density from which the density power spectrum is derived. The power spectra obtained by this method extend the observed frequency range by an order of magnitude while remaining consistent with previous results near a few Hertz. Density power spectral indices are found to be organized by the angle between the local magnetic field and the solar wind direction, indicating significant anisotropy in solar wind high-frequency density turbulence.

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