Wave activity inside hot flow anomaly cavities

Details Wave activity inside hot flow anomaly cavities Wave activity inside hot flow anomaly cavities

Aug 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jgra..11308113t&link_type=abstract

Journal of Geophysical Research, Volume 113, Issue A8, CiteID A08113

Physics

6

Interplanetary Physics: Plasma Waves And Turbulence, Interplanetary Physics: Planetary Bow Shocks, Interplanetary Physics: Solar Wind Plasma, Interplanetary Physics: General Or Miscellaneous

Scientific paper

Low-frequency wave properties inside two hot flow anomalies (HFAs) at different stages of evolution are, for the first time, studied applying the k-filtering technique on multipoint measurements from the Cluster satellites. The observed wave activity in an HFA cavity in an early stage of its evolution was interpreted as the combination of inherent fluctuation in the solar wind and those of a plasma component specularly reflected at the Earth's bow shock, where the amplitude of the fluctuations had been enhanced by a plasma beam instability. The wave field of a more evolved HFA was found to be less complex but contained a periodicity in the wave number distribution with a period that is suggested to come from the geometry of the HFA cavity.

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