Analysis of trends between solar wind velocity and energetic electron fluxes at geostationary orbit using the reverse arrangement test. Issue 2 (26th February 2013)

• Record Type: Journal Article
• Authors: Aryan, Homayon; Boynton, Richard J.; Walker, Simon N.
• Is Part Of: Journal of geophysical research. Volume 118:Issue 2(2013:Feb.)
• Page Start: 636
• Page End: 641
• Publication Date: 2013-02-26
• Subjects: Energetic Electrons -- GSO -- Trend; Magnetospheric physics -- Periodicals; Space environment -- Periodicals; Cosmic physics -- Periodicals; Planets -- Atmospheres -- Periodicals; Heliosphere (Astrophysics) -- Periodicals; Geophysics -- Periodicals; 523.01
• DOI: 10.1029/2012JA018216
• Languages: English
• ISSNs: 2169-9380

Abstract

Abstract : [1] A correlation between solar wind velocity ( V SW ) and energetic electron fluxes (EEF) at the geosynchronous orbit was first identified more than 30 years ago. However, recent studies have shown that the relation between V SW and EEF is considerably more complex than was previously suggested. The application of process identification technique to the evolution of electron fluxes in the range 1.8 − 3.5 MeV has also revealed peculiarities in the relation between V SW and EEF at the geosynchronous orbit. It has been revealed that for a constant solar wind density, EEF increase with V SW until a saturation velocity is reached. Beyond the saturation velocity, an increase in V SW is statistically not accompanied with EEF enhancement. The present study is devoted to the investigation of saturation velocity and its dependency upon solar wind density using the reverse arrangement test. In general, the results indicate that saturation velocity increases as solar wind density decreases. This implies that solar wind density plays an important role in defining the relationship between V SW and EEF at the geosynchronous orbit. Key Points: Flux of energetic electrons controlled by solar wind density/velocity. Below a certain velocity EEF correlates with Vsw. Above it they are independent This velocity depends on solar wind density.