Kinetic‐Scale Turbulence in the Venusian Magnetosheath
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 environm...
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| Language: | English |
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Wiley
2021-01-01
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| Series: | Geophysical Research Letters |
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| Online Access: | https://doi.org/10.1029/2020GL090783 |
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| author | T. A. Bowen S. D. Bale R. Bandyopadhyay J. W. Bonnell A. Case A. Chasapis C. H. K. Chen S. Curry T. Dudok de Wit K. Goetz K. Goodrich J. Gruesbeck J. Halekas P. R. Harvey G. G. Howes J. C. Kasper K. Korreck D. Larson R. Livi R. J. MacDowall D. M. Malaspina A. Mallet M. D. McManus B. Page M. Pulupa N. Raouafi M. L. Stevens P. Whittlesey |
| author_facet | T. A. Bowen S. D. Bale R. Bandyopadhyay J. W. Bonnell A. Case A. Chasapis C. H. K. Chen S. Curry T. Dudok de Wit K. Goetz K. Goodrich J. Gruesbeck J. Halekas P. R. Harvey G. G. Howes J. C. Kasper K. Korreck D. Larson R. Livi R. J. MacDowall D. M. Malaspina A. Mallet M. D. McManus B. Page M. Pulupa N. Raouafi M. L. Stevens P. Whittlesey |
| author_sort | T. A. Bowen |
| collection | DOAJ |
| description | 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, β ∼ 1 magnetosheath plasma, and a kinetic range scaling of k−2.9. VGA2 was characterized by a quasi‐perpendicular shock with β ∼ 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. |
| format | Article |
| id | doaj-art-5b279092cdaf4abe8a6bc86771d6700e |
| institution | DOAJ |
| issn | 0094-8276 1944-8007 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Geophysical Research Letters |
| spelling | doaj-art-5b279092cdaf4abe8a6bc86771d6700e2025-08-20T03:04:21ZengWileyGeophysical Research Letters0094-82761944-80072021-01-01482n/an/a10.1029/2020GL090783Kinetic‐Scale Turbulence in the Venusian MagnetosheathT. A. Bowen0S. D. Bale1R. Bandyopadhyay2J. W. Bonnell3A. Case4A. Chasapis5C. H. K. Chen6S. Curry7T. Dudok de Wit8K. Goetz9K. Goodrich10J. Gruesbeck11J. Halekas12P. R. Harvey13G. G. Howes14J. C. Kasper15K. Korreck16D. Larson17R. Livi18R. J. MacDowall19D. M. Malaspina20A. Mallet21M. D. McManus22B. Page23M. Pulupa24N. Raouafi25M. L. Stevens26P. Whittlesey27Space Sciences Laboratory University of California Berkeley CA USASpace Sciences Laboratory University of California Berkeley CA USADepartment of Astrophysical Sciences Princeton University Princeton NJ USASpace Sciences Laboratory University of California Berkeley CA USASmithsonian Astrophysical Observatory Cambridge MA USALaboratory for Atmospheric and Space Physics University of Colorado Boulder CO USASchool of Physics and Astronomy Queen Mary University of London London UKSpace Sciences Laboratory University of California Berkeley CA USALPC2E, CNRS and University of Orléans Orléans FranceSchool of Physics and Astronomy University of Minnesota Minneapolis MN USASpace Sciences Laboratory University of California Berkeley CA USAPlanetary Magnetospheres Laboratory NASA Goddard Space Flight Center Greenbelt MD USADepartment of Physics and Astronomy University of Iowa Iowa City IA USASpace Sciences Laboratory University of California Berkeley CA USADepartment of Physics and Astronomy University of Iowa Iowa City IA USAClimate and Space Sciences and Engineering University of Michigan Ann Arbor MI USASmithsonian Astrophysical Observatory Cambridge MA USASpace Sciences Laboratory University of California Berkeley CA USASpace Sciences Laboratory University of California Berkeley CA USAPlanetary Magnetospheres Laboratory NASA Goddard Space Flight Center Greenbelt MD USALaboratory for Atmospheric and Space Physics University of Colorado Boulder CO USASpace Sciences Laboratory University of California Berkeley CA USASpace Sciences Laboratory University of California Berkeley CA USASpace Sciences Laboratory University of California Berkeley CA USASpace Sciences Laboratory University of California Berkeley CA USAJohns Hopkins University Applied Physics Laboratory Laurel MD USASmithsonian Astrophysical Observatory Cambridge MA USASpace Sciences Laboratory University of California Berkeley CA USAAbstract 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, β ∼ 1 magnetosheath plasma, and a kinetic range scaling of k−2.9. VGA2 was characterized by a quasi‐perpendicular shock with β ∼ 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.https://doi.org/10.1029/2020GL090783InstabilitykineticplasmaPSPturbulenceVenus |
| spellingShingle | T. A. Bowen S. D. Bale R. Bandyopadhyay J. W. Bonnell A. Case A. Chasapis C. H. K. Chen S. Curry T. Dudok de Wit K. Goetz K. Goodrich J. Gruesbeck J. Halekas P. R. Harvey G. G. Howes J. C. Kasper K. Korreck D. Larson R. Livi R. J. MacDowall D. M. Malaspina A. Mallet M. D. McManus B. Page M. Pulupa N. Raouafi M. L. Stevens P. Whittlesey Kinetic‐Scale Turbulence in the Venusian Magnetosheath Geophysical Research Letters Instability kinetic plasma PSP turbulence Venus |
| title | Kinetic‐Scale Turbulence in the Venusian Magnetosheath |
| title_full | Kinetic‐Scale Turbulence in the Venusian Magnetosheath |
| title_fullStr | Kinetic‐Scale Turbulence in the Venusian Magnetosheath |
| title_full_unstemmed | Kinetic‐Scale Turbulence in the Venusian Magnetosheath |
| title_short | Kinetic‐Scale Turbulence in the Venusian Magnetosheath |
| title_sort | kinetic scale turbulence in the venusian magnetosheath |
| topic | Instability kinetic plasma PSP turbulence Venus |
| url | https://doi.org/10.1029/2020GL090783 |
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