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Statistical Mapping...
Statistical Mapping of Magnetic Topology at Venus
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- Xu, Shaosui (author)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
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- Frahm, Rudy A. (author)
- Southwest Res Inst, San Antonio, TX USA.
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- Ma, Yingjuan (author)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
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- Luhmann, Janet G. (author)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
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- Mitchell, David L. (author)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA.
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- Persson, Moa (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA Southwest Res Inst, San Antonio, TX USA. (creator_code:org_t)
- American Geophysical Union (AGU), 2023
- 2023
- English.
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In: Journal of Geophysical Research - Space Physics. - : American Geophysical Union (AGU). - 2169-9380 .- 2169-9402. ; 128:12
- Related links:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Subject headings
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- Despite Venus having insignificant intrinsic magnetic fields, the magnetic connectivity between the solar wind and the Venus ionosphere, or magnetic topology, is not as simple as expected and is also important for characterizing the Venus space environment. This study provides a technique combining superthermal electron energy and pitch angle distributions to infer up to 6 subtypes of magnetic topology at Venus. This enables us to determine magnetic topology with automated procedures using the Venus Express (VEx) observations from May 2006 to November 2014. We find that the draped topology (both ends of a field line not connected to the collisional ionosphere) is the dominant topology in the near-Venus space environment, >70%, except at low altitudes close to the ionosphere. The open (a field line connected to both the solar wind and the collisional ionosphere) and closed (a field line connected only to the collisional ionosphere) topologies make up 20%-30% on average of the magnetotail and up to 50% at low altitudes. This study provides the first characterization of the statistical distributions of different magnetic topologies at Venus.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Keyword
- Venus
- induced magnetosphere
- magnetic topology
- solar wind interaction
- superthermal electrons
- Venus Express
Publication and Content Type
- ref (subject category)
- art (subject category)
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