Journal article
Evidence of Subproton‐Scale Magnetic Holes in the Venusian Magnetosheath
Geophysical research letters, Vol.48(5), e2020GL090329
03/16/2021
DOI: 10.1029/2020GL090329
Abstract
Depressions in magnetic field strength, commonly referred to as magnetic holes, are observed ubiquitously in space plasmas. Subproton-scale magnetic holes with spatial scales smaller than or on the order of a proton gyroradius, are likely supported by electron current vortices, rotating perpendicular to the ambient magnetic field. While there are numerous accounts of subproton-scale magnetic holes within the Earth’s magnetosphere, there are few, if any, reported observations in other space plasma environments. We present the first evidence of subproton-scale magnetic holes in the Venusian magnetosheath. During Parker Solar Probe’s first Venus Gravity Assist, the spacecraft crossed the planet’s bow shock and subsequently observed the Venusian magnetosheath. The FIELDS instrument suite onboard the spacecraft achieved magnetic and electric field measurements of magnetic hole structures. The electric fields associated with magnetic depressions are consistent with electron current vortices with amplitudes on the order of 1µA/m2.
Details
- Title: Subtitle
- Evidence of Subproton‐Scale Magnetic Holes in the Venusian Magnetosheath
- Creators
- Katherine Goodrich - University of California, BerkeleyJohn Bonnell - University of California, BerkeleyShannon Curry - University of California, BerkeleyRoberto Livi - University of California, BerkeleyPhyllis Whittlesey - University of California, BerkeleyForrest Mozer - University of California, BerkeleyDavid Malaspina - University of Colorado BoulderJasper Halekas - University of IowaMichael Mcmanus - University of California, BerkeleyStuart Bale - University of California, BerkeleyTrevor Bowen - University of California, BerkeleyAnthony Case - Center for Astrophysics Harvard & SmithsonianThierry Dudok de Wit - Laboratoire de Physique et Chimie de l'Environnement et de l'EspaceKeith Goetz - University of MinnesotaPeter Harvey - University of California, BerkeleyJustin Kasper - University of Michigan–Ann ArborDavin Larson - University of California, BerkeleyRobert Macdowall - Goddard Space Flight CenterMarc Pulupa - University of California, BerkeleyMichael Stevens - Center for Astrophysics Harvard & Smithsonian
- Resource Type
- Journal article
- Publication Details
- Geophysical research letters, Vol.48(5), e2020GL090329
- Publisher
- American Geophysical Union
- DOI
- 10.1029/2020GL090329
- ISSN
- 0094-8276
- eISSN
- 1944-8007
- Language
- English
- Date published
- 03/16/2021
- Academic Unit
- Physics and Astronomy
- Record Identifier
- 9984428820502771
Metrics
1 Record Views