Temporal, Spatial, and Velocity‐Space Variations of Electron Phase Space Density Measurements at the Magnetopause-Reference-Cited by-同舟云学术

Temporal, Spatial, and Velocity‐Space Variations of Electron Phase Space Density Measurements at the Magnetopause

Published:2023-04 Issue:4 Volume:128 Page:
ISSN:2169-9380
Container-title:Journal of Geophysical Research: Space Physics
language:en
Short-container-title:JGR Space Physics

Author:

Shuster J. R.¹²³^ORCID,Gershman D. J.²^ORCID,Giles B. L.²^ORCID,Bessho N.¹²^ORCID,Sharma A. S.¹,Dorelli J. C.²,Uritsky V.²⁴,Schwartz S. J.⁵^ORCID,Cassak P. A.⁶^ORCID,Denton R. E.⁷^ORCID,Chen L.‐J.²^ORCID,Gurram H.¹²,Ng J.¹²^ORCID,Burch J.⁸^ORCID,Webster J.⁹^ORCID,Torbert R.³⁸^ORCID,Paterson W. R.²,Schiff C.²,Viñas A. F.²⁴,Avanov L. A.¹²^ORCID,Stawarz J.¹⁰¹¹^ORCID,Li T. C.⁷^ORCID,Liu Y.‐H.⁷^ORCID,Argall M. R.³^ORCID,Afshari A.¹²^ORCID,Payne D. S.¹³^ORCID,Farrugia C. J.³^ORCID,Verniero J.²,Wilder F.¹⁴,Genestreti K.⁸^ORCID,da Silva D. E.²⁴¹⁵^ORCID

Affiliation:

1. Department of Astronomy University of Maryland College Park College Park MD USA

2. NASA Goddard Space Flight Center Greenbelt MD USA

3. Space Science Center University of New Hampshire Durham NH USA

4. Department of Physics Catholic University of America Washington DC USA

5. Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder CO USA

6. Department of Physics and Astronomy and the Center for KINETIC Plasma Physics West Virginia University Morgantown WV USA

7. Department of Physics and Astronomy Dartmouth College Hanover NH USA

8. Southwest Research Institute San Antonio TX USA

9. Department of Physics and Astronomy Rice University Houston TX USA

10. Department of Physics Imperial College London London GB

11. Department of Mathematics, Physics, and Electrical Engineering Northumbria University Newcastle upon Tyne UK

12. Department of Physics and Astronomy University of Iowa Iowa City IA USA

13. Institute for Research in Electronics and Applied Physics University of Maryland College Park MD USA

14. Department of Physics University of Texas at Arlington Arlington TX USA

15. Goddard Planetary Heliophysics Institute University of Maryland Baltimore County Baltimore County MD USA

Abstract

AbstractTemporal, spatial, and velocity‐space variations of electron phase space density are measured observationally and compared for the first time using the four magnetospheric multiscale (MMS) spacecraft at Earth's magnetopause. Equipped with these unprecedented spatiotemporal measurements offered by the MMS tetrahedron, we compute each term of the electron Vlasov equation that governs the evolution of collisionless plasmas found throughout the universe. We demonstrate how to use single spacecraft measurements to improve the resolution of the electron pressure gradient that supports nonideal parallel electric fields, and we develop a model to intuit the types of kinetic velocity‐space signatures that are observed in the Vlasov equation terms. Furthermore, we discuss how the gradient in velocity‐space sheds light on plasma energy conversion mechanisms and wave‐particle interactions that occur in fundamental physical processes such as magnetic reconnection and turbulence.

Funder

Goddard Space Flight Center

Publisher

American Geophysical Union (AGU)

Subject

Space and Planetary Science,Geophysics

Link

https://onlinelibrary.wiley.com/doi/pdf/10.1029/2022JA030949

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