Based on the OMNI2 database for the period from 1976 to 2019, the behavior of the relative abundance of helium ions Nα/Np is investigated inside interplanetary coronal mass ejections (ICMEs). It is shown that the previously discovered anticorrelation between Nα/Np and the parameter β inside ICMEs is due to the dependence on magnetic pressure (or the magnitude of the interplanetary magnetic field), while the dependence of Nα/Np on the magnitude of the thermal pressure weakly falling in a magnetic cloud and increases in EJECTA. The data obtained are consistent with the previously suggested hypothesis that an electric current enriched with helium ions flows inside an ICME [1–3].
Helium Abundance Variations in Interplanetary Coronal Mass Ejections
Cosmic Res
Cosmic Research ; 60 , 2 ; 67-72
2022-04-01
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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