Ion and electron 𝜅 distribution functions along the plasma sheetстатья
Статья опубликована в высокорейтинговом журнале
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Статья опубликована в журнале из списка Web of Science и/или Scopus
Дата последнего поиска статьи во внешних источниках: 20 августа 2018 г.
Аннотация:We use kappa distributions to model thousands of ion and electron flux spectra along the plasma sheet and analyze the variation of the spectral index 𝜅 and the temperature T in this region. We find that 𝜅 distributions are ubiquitous and fit well ion and electron flux spectra during quiet times, and during the expansion and recovery phases of substorms. Near Earth, and up to ∼12 RE, the 𝜅 indices are different than the rest of the plasma sheet, both for ions (𝜅i) and electrons (𝜅e). There is a significant dawn-dusk asymmetry in 𝜅i toward the tail, which is enhanced during substorms. The ions also exhibit a permanent temperature asymmetry, determined by a colder dawnside. The whole tail becomes hotter during substorms, but it appears that most of the energy is deposited near Earth.