Solar wind electron microphysics: Results from a Wind electron database

Details Solar wind electron microphysics: Results from a Wind electron database Solar wind electron microphysics: Results from a Wind electron database

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsh53b2034p&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SH53B-2034

Physics

[2159] Interplanetary Physics / Plasma Waves And Turbulence, [2164] Interplanetary Physics / Solar Wind Plasma, [2169] Interplanetary Physics / Solar Wind Sources, [2194] Interplanetary Physics / Instruments And Techniques

Scientific paper

We have performed a comprehensive analysis of electron velocity distribution functions (eVDFs) in the solar wind using the Wind 3DP experiment, generating an accurate database of core, halo and strahl electron parameters at 1AU. We describe progress on several topics related to electron microphysics. Using measured parallel drift speeds of the separate eVDF populations, we verify the current balance condition of the overall eVDF, and also investigate any possible deviations from current balance as a function of solar wind conditions. We also examine the related issue of electron heat flux Qe, comparing contributions to Qe from the suprathermal strahl and halo populations and exploring possible mechanisms to regulate Qe in the solar wind. The strahl population exhibits considerable two-dimensional structure and is not always well described by a simple pitch-angle limited beam. We characterize these complex strahl distributions and examine the dependence of strahl moments and structure on solar wind parameters.

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