Statistical features of the global polarity reversal of the Venusian induced magnetosphere in response to the polarity change in interplanetary magnetic field

Daniel Vech, Gabriella Stenberg, Hans Nilsson, Niklas J T Edberg, Andrea Opitz, K. Szegö, Tielong Zhang, Yoshifumi Futaana

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

In this study we present the first statistical analysis on the effects of heliospheric current sheet crossings on the induced magnetosphere of Venus. These events are of particular interest because they lead to the reconfiguration of the induced magnetosphere with opposite polarity. We use a statistical approach based on 117 orbit pairs, and we study the spatial distribution of the heavy ion flux measurements in the plasma environment of Venus. The average and median heavy ion flux measurements are compared before and after the polarity reversal events. The results show that after the events the average and median heavy ion fluxes in the magnetotail are reduced by the factors of 0.75±0.09 and 0.52, respectively. We find that even if a passage of a current sheet is a short time scale event lasting about 10min, its effect on the near-Venus plasma environment lasts for a few hours. We conclude that the observations show similarities to the previous comet studies and the polarity reversal of the induced magnetosphere might be accompanied with dayside reconnection and magnetic disconnection of the plasma tail from the planetary ionosphere.

Original languageEnglish
JournalJournal of Geophysical Research
DOIs
Publication statusAccepted/In press - 2016

Fingerprint

Magnetosphere
Heavy Ions
magnetic reversal
interplanetary magnetic fields
magnetic fields
Venus
magnetospheres
magnetosphere
polarity
Venus (planet)
flux measurement
ions
Magnetic fields
Fluxes
magnetic field
Plasmas
plasma
heavy ions
ion
current sheets

Keywords

  • Heliospheric current sheet
  • Induced magnetosphere
  • Particle acceleration
  • Space weather
  • Tail disconnection
  • Venus

ASJC Scopus subject areas

  • Space and Planetary Science
  • Geophysics

Cite this

Statistical features of the global polarity reversal of the Venusian induced magnetosphere in response to the polarity change in interplanetary magnetic field. / Vech, Daniel; Stenberg, Gabriella; Nilsson, Hans; Edberg, Niklas J T; Opitz, Andrea; Szegö, K.; Zhang, Tielong; Futaana, Yoshifumi.

In: Journal of Geophysical Research, 2016.

Research output: Contribution to journalArticle

Vech, Daniel ; Stenberg, Gabriella ; Nilsson, Hans ; Edberg, Niklas J T ; Opitz, Andrea ; Szegö, K. ; Zhang, Tielong ; Futaana, Yoshifumi. / Statistical features of the global polarity reversal of the Venusian induced magnetosphere in response to the polarity change in interplanetary magnetic field. In: Journal of Geophysical Research. 2016.
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AU - Nilsson, Hans

AU - Edberg, Niklas J T

AU - Opitz, Andrea

AU - Szegö, K.

AU - Zhang, Tielong

AU - Futaana, Yoshifumi

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