The periodicity of solar wind high-beta structures

Details The periodicity of solar wind high-beta structures The periodicity of solar wind high-beta structures

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsh21a0508k&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SH21A-0508

Physics

2164 Solar Wind Plasma, 2784 Solar Wind/Magnetosphere Interactions

Scientific paper

Pressure-balanced structures are a common feature in the solar wind. In these structures, variations in the thermal pressure are matched by opposite variations in the magnetic pressure, keeping the total pressure approximately constant. Recent work has shown that these PBSs often reoccur at regularly spaced intervals and can directly-drive global magnetospheric pulsations. Interestingly, we show that the solar wind density fluctuations, when converted into length-scales, organize into scale-sizes of L=23, 30, 45, and 80-100 RE. In addition, we have statistically examined these structures using several years worth of WIND data. In particular, we examined the distributions of recurrence-times, scale-sizes and durations of high-beta solar structures in the solar wind, and find that the spectra of duration and recurrence-time are not flat.

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