Solar Wind Periodicity in Energetic Electrons at Saturn

Details Solar Wind Periodicity in Energetic Electrons at Saturn Solar Wind Periodicity in Energetic Electrons at Saturn

Dec 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufm.p53c..07c&link_type=abstract

American Geophysical Union, Fall Meeting 2009, abstract #P53C-07

Physics

[2756] Magnetospheric Physics / Planetary Magnetospheres, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions

Scientific paper

Fluxes of energetic electrons (110-365 keV) have been subjected to a long-term Lomb periodogram analysis from the middle of 2004 to the middle of 2009. Fluxes within 20 RS and outside the magnetopause were excluded, so only fluxes within the magnetosphere were included in the analysis. The periodogram “box” was expanded from 5 days to 50 days. In addition to the familiar period near 10.8 hours, the electron fluxes exhibited a strong periodicity near 26 days (the solar wind period) and also a weaker periodicity near 13 days (half the solar wind period). A simulated periodogram using a “rotating anomaly” observed from the Cassini orbit does not show 26-day and 13-day periods, so the observed solar wind periods must not be caused by a possible orbital resonance. The long-term electron periodogram does not show any periodicities associated with Saturn’s moons.

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