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Kinetic-Scale Turbulence in the Venusian Magnetosheath
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  • Trevor A Bowen,
  • Stuart D. Bale,
  • Riddhi Bandyopadhyay,
  • John W. Bonnell,
  • Anthony William Case,
  • Alexandros Chasapis,
  • Christopher Chen,
  • Shannon M. Curry,
  • Thierry Dudok de Wit,
  • Keith Goetz,
  • Katherine Amanda Goodrich,
  • Jacob R. Gruesbeck,
  • Jasper S. Halekas,
  • Peter R Harvey,
  • Gregory Gershom Howes,
  • Justin C. Kasper,
  • Kelly Korreck,
  • Davin E. Larson,
  • Roberto Livi,
  • Robert John MacDowall,
  • David M. Malaspina,
  • Alfred Mallet,
  • Michael D McManus,
  • Brent Page,
  • Marc Pulupa,
  • Nour-Eddine Raouafi,
  • Michael Louis Stevens,
  • Phyllis Whittlesey
Trevor A Bowen
Space Sciences Laboratory

Corresponding Author:[email protected]

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Stuart D. Bale
UC Berkeley
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Riddhi Bandyopadhyay
Princeton University
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John W. Bonnell
University of California
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Anthony William Case
Harvard-Smithsonian Center for Astrophysics
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Alexandros Chasapis
University of Colorado
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Christopher Chen
Queen Mary University of London
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Shannon M. Curry
UC Berkeley
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Thierry Dudok de Wit
CNRS and University of Orléans
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Keith Goetz
University of Minnesota
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Katherine Amanda Goodrich
University of California, Berkeley
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Jacob R. Gruesbeck
University of Maryland
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Jasper S. Halekas
University of Iowa
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Peter R Harvey
University of California, Berkeley
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Gregory Gershom Howes
University of Iowa
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Justin C. Kasper
University of Michigan-Ann Arbor
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Kelly Korreck
Harvard-Smithsonian Center for Astrophysics
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Davin E. Larson
University of California, Berkeley
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Roberto Livi
University of California, Berkeley
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Robert John MacDowall
NASA Goddard Space Flight Center
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David M. Malaspina
University of Colorado Boulder
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Alfred Mallet
University of California Berkeley
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Michael D McManus
University of California, Berkeley
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Brent Page
University of California, Berkeley
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Marc Pulupa
Space Sciences Laboratory, University of California at Berkeley
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Nour-Eddine Raouafi
The Johns Hopkins University Applied Physics Laboratory
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Michael Louis Stevens
Harvard-Smithsonian Center for Astrophysics
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Phyllis Whittlesey
University of California, Berkeley
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Abstract

While not specifically designed as a planetary mission, NASA’s Parker Solar Probe (PSP) mission uses a series of Venus gravity assists (VGAs) in order to reduce its perihelion distance. These orbital maneuvers provide the opportunity for direct measurements of the Venus plasma environment at high cadence. We present first observations of kinetic scale turbulence in the Venus magnetosheath from the first two VGAs. In VGA1, PSP observed a quasi-parallel shock, $\beta\sim1$ magnetosheath plasma, and a kinetic range scaling of $k^{-2.9}$. VGA2 was characterised by a quasi-perpendicular shock with $\beta\sim 10$, and a steep $k^{-3.4}$ spectral scaling. Temperature anisotropy measurements from VGA2 suggest an active mirror mode instability. Significant coherent waves are present in both encounters at sub-ion and electron scales. Using conditioning techniques to exclude these electromagnetic wave events suggests the presence of developed sub-ion kinetic turbulence in both magnetosheath encounters.