Over-expansion of a coronal mass ejection generates sub-Alfvénic plasma conditions in the solar wind at Earth

Context. From May 24–25, 2002, four spacecraft located in the solar wind at about 1 astronomical unit (au) measured plasma densities one to two orders of magnitude lower than usual. The density was so low that the flow became sub-Alfvénic for four hours, and the Alfvén Mach number was as low as 0.4....

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Veröffentlicht in:	Astronomy and astrophysics (Berlin) 2021-03, Vol.647, p.A149
Hauptverfasser:	Chané, E., Schmieder, B., Dasso, S., Verbeke, C., Grison, B., Démoulin, P., Poedts, S.
Format:	Artikel
Sprache:	eng
Schlagworte:	Celestial bodies Coronagraphs Coronal mass ejection Mach number Plasma density Sciences of the Universe Solar wind Spectrometry Velocity distribution
Online-Zugang:	Volltext
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