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Title: Magnetic Reconnection in Three Dimensions: Modeling and Analysis of Electromagnetic Drift Waves in the Adjacent Current Sheet

Abstract

Magnetic reconnection at the subsolar magnetopause is persistently accompanied by strong fluctuations of the magnetic field (B), plasma density (n), and all components of the electric field (E) and current (J). The strongest fluctuations are at frequencies below the lower hybrid frequency and observed in a thin, intense current sheet adjacent to the electron diffusion region. In this current sheet, the background magnitudes of B and n are changing considerably, creating an inhomogeneous plasma environment. In this paper, we show that the fluctuations in B and n are consistent with an oscillatory displacement of the current sheet in the surface normal direction. The displacement is propagating parallel to the magnetic reconnection X-line. Wavelengths are on the order of or longer than the thickness of the current sheet to which they are confined, so we label these waves electromagnetic drift waves. E and J fluctuations are more complex than a simple displacement. They have significant variations in the component along B, which suggest that the drift waves also may be confined along B. The current sheet is supported by an electron drift driven by normal electric field, which, in turn, is balanced by an ion pressure gradient. We suggest that wavemore » growth comes from an instability related to the drift between the electrons and ions. We discuss the possibility that drift waves can displace or penetrate into the electron diffusion region giving magnetic reconnection three-dimensional structure. Drift waves may corrugate the X-line, possibly breaking the X-line and generating turbulence.« less

Authors:
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4];  [5];  [6]; ORCiD logo [7]; ORCiD logo [8]; ORCiD logo [2]; ORCiD logo [9]; ORCiD logo [10]; ORCiD logo [11]; ORCiD logo [12]; ORCiD logo [13]; ORCiD logo [1]; ORCiD logo [14] more »; ORCiD logo [15]; ORCiD logo [16];  [17];  [17];  [18] « less
  1. Univ. of Colorado, Boulder, CO (United States)
  2. Univ. of Maryland, College Park, MD (United States)
  3. Bergen Univ. (Norway)
  4. Univ. of Delaware, Newark, DE (United States)
  5. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States); Princeton Univ., NJ (United States)
  6. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  7. Swedish Inst. of Space Physics, Uppsala (Sweden)
  8. West Virginia Univ., Morgantown, WV (United States)
  9. Southwest Research Inst., San Antonio, TX (United States)
  10. Southwest Research Inst., San Antonio, TX (United States); Univ. of New Hampshire, Durham, NH (United States)
  11. Austrian Academy of Sciences, Graz (Austria)
  12. Imperial College, London (United Kingdom)
  13. Univ. of California, Berkeley, CA (United States)
  14. Univ. of California, Los Angeles, CA (United States)
  15. Laboratoire de Physique des Plasmas, Palaiseau (France)
  16. KTH Royal Inst. of Technology, Stockholm (Sweden)
  17. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States)
  18. NASA Goddard Space Flight Center (GSFC), Greenbelt, MD (United States); Univ. of Maryland, College Park, MD (United States)
Publication Date:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
Contributing Org.:
National Aeronautic and Space Administration (NASA) MMS
OSTI Identifier:
1659660
Grant/Contract Number:  
AC02-09CH11466
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Geophysical Research. Space Physics
Additional Journal Information:
Journal Volume: 124; Journal Issue: 12; Journal ID: ISSN 2169-9380
Publisher:
American Geophysical Union
Country of Publication:
United States
Language:
English
Subject:
79 ASTRONOMY AND ASTROPHYSICS; Drift Waves; Magnetic Reconnection; Turbulence; Parallel Electric Fields

Citation Formats

Ergun, Robert E., Hoilijoki, Sanni, Ahmadi, Narges, Schwartz, Steven J., Wilder, Frederick Durand, Drake, J. F., Hesse, M., Shay, M. A., Ji, H., Yamada, M., Graham, Daniel Bruce, Cassak, P. A., Swisdak, M., Burch, James L., Torbert, Roy B., Holmes, Justin C., Stawarz, Julia E., Goodrich, Katherine Amanda, Eriksson, Stefan, Strangeway, Robert J., LeContel, Olivier, Lindquist, Per-Arne, Giles, Barbara L., Gershman, Daniel J., and Chen, L. J.. Magnetic Reconnection in Three Dimensions: Modeling and Analysis of Electromagnetic Drift Waves in the Adjacent Current Sheet. United States: N. p., 2019. Web. https://doi.org/10.1029/2019ja027275.
Ergun, Robert E., Hoilijoki, Sanni, Ahmadi, Narges, Schwartz, Steven J., Wilder, Frederick Durand, Drake, J. F., Hesse, M., Shay, M. A., Ji, H., Yamada, M., Graham, Daniel Bruce, Cassak, P. A., Swisdak, M., Burch, James L., Torbert, Roy B., Holmes, Justin C., Stawarz, Julia E., Goodrich, Katherine Amanda, Eriksson, Stefan, Strangeway, Robert J., LeContel, Olivier, Lindquist, Per-Arne, Giles, Barbara L., Gershman, Daniel J., & Chen, L. J.. Magnetic Reconnection in Three Dimensions: Modeling and Analysis of Electromagnetic Drift Waves in the Adjacent Current Sheet. United States. https://doi.org/10.1029/2019ja027275
Ergun, Robert E., Hoilijoki, Sanni, Ahmadi, Narges, Schwartz, Steven J., Wilder, Frederick Durand, Drake, J. F., Hesse, M., Shay, M. A., Ji, H., Yamada, M., Graham, Daniel Bruce, Cassak, P. A., Swisdak, M., Burch, James L., Torbert, Roy B., Holmes, Justin C., Stawarz, Julia E., Goodrich, Katherine Amanda, Eriksson, Stefan, Strangeway, Robert J., LeContel, Olivier, Lindquist, Per-Arne, Giles, Barbara L., Gershman, Daniel J., and Chen, L. J.. Thu . "Magnetic Reconnection in Three Dimensions: Modeling and Analysis of Electromagnetic Drift Waves in the Adjacent Current Sheet". United States. https://doi.org/10.1029/2019ja027275. https://www.osti.gov/servlets/purl/1659660.
@article{osti_1659660,
title = {Magnetic Reconnection in Three Dimensions: Modeling and Analysis of Electromagnetic Drift Waves in the Adjacent Current Sheet},
author = {Ergun, Robert E. and Hoilijoki, Sanni and Ahmadi, Narges and Schwartz, Steven J. and Wilder, Frederick Durand and Drake, J. F. and Hesse, M. and Shay, M. A. and Ji, H. and Yamada, M. and Graham, Daniel Bruce and Cassak, P. A. and Swisdak, M. and Burch, James L. and Torbert, Roy B. and Holmes, Justin C. and Stawarz, Julia E. and Goodrich, Katherine Amanda and Eriksson, Stefan and Strangeway, Robert J. and LeContel, Olivier and Lindquist, Per-Arne and Giles, Barbara L. and Gershman, Daniel J. and Chen, L. J.},
abstractNote = {Magnetic reconnection at the subsolar magnetopause is persistently accompanied by strong fluctuations of the magnetic field (B), plasma density (n), and all components of the electric field (E) and current (J). The strongest fluctuations are at frequencies below the lower hybrid frequency and observed in a thin, intense current sheet adjacent to the electron diffusion region. In this current sheet, the background magnitudes of B and n are changing considerably, creating an inhomogeneous plasma environment. In this paper, we show that the fluctuations in B and n are consistent with an oscillatory displacement of the current sheet in the surface normal direction. The displacement is propagating parallel to the magnetic reconnection X-line. Wavelengths are on the order of or longer than the thickness of the current sheet to which they are confined, so we label these waves electromagnetic drift waves. E and J fluctuations are more complex than a simple displacement. They have significant variations in the component along B, which suggest that the drift waves also may be confined along B. The current sheet is supported by an electron drift driven by normal electric field, which, in turn, is balanced by an ion pressure gradient. We suggest that wave growth comes from an instability related to the drift between the electrons and ions. We discuss the possibility that drift waves can displace or penetrate into the electron diffusion region giving magnetic reconnection three-dimensional structure. Drift waves may corrugate the X-line, possibly breaking the X-line and generating turbulence.},
doi = {10.1029/2019ja027275},
journal = {Journal of Geophysical Research. Space Physics},
number = 12,
volume = 124,
place = {United States},
year = {2019},
month = {11}
}

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