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Prolonged Kelvin-He...
Prolonged Kelvin-Helmholtz Waves at Dawn and Dusk Flank Magnetopause : Simultaneous Observations by MMS and THEMIS
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- Lu, S. W. (author)
- Chinese Acad Sci, State Key Lab Space Weather, Natl Space Sci Ctr, Beijing 100190, Peoples R China;Univ Chinese Acad Sci, Chinese Acad Sci, Beijing 100049, Peoples R China
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- Wang, C. (author)
- Chinese Acad Sci, State Key Lab Space Weather, Natl Space Sci Ctr, Beijing 100190, Peoples R China;Univ Chinese Acad Sci, Chinese Acad Sci, Beijing 100049, Peoples R China
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- Li, Wenya Y. (author)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen,Chinese Acad Sci, State Key Lab Space Weather, Natl Space Sci Ctr, Beijing 100190, Peoples R China
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- Tang, B. B. (author)
- Chinese Acad Sci, State Key Lab Space Weather, Natl Space Sci Ctr, Beijing 100190, Peoples R China
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- Torbert, R. B. (author)
- Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA
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- Giles, B. L. (author)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
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- Russell, C. T. (author)
- Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA
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- Burch, J. L. (author)
- Southwest Res Inst, San Antonio, TX USA
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- McFadden, J. P. (author)
- Univ Calif Berkeley, Space Sci Lab, Berkeley, CA 94720 USA
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- Auster, H. U. (author)
- Techn Univ Braunschweig, Inst Geophys & Extraterrestr Phys Techn, Mendelssohnstr 3, D-38106 Braunschweig, Germany
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- Angelopoulos, V (author)
- Univ Calif Los Angeles, Inst Geophys & Planetary Phys, Los Angeles, CA 90024 USA
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(creator_code:org_t)
- 2019-04-16
- 2019
- English.
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In: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 875:1
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Abstract
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- The Kelvin-Helmholtz (K-H) waves predominantly excited at the Earth's low-latitude magnetopause were suggested to be dawn-dusk asymmetric. We report a prolonged simultaneous observations of the K-H waves on the dawn and dusk magnetopause by Magnetospheric Multiscale (MMS) and THEMIS-A (THA) spacecraft, respectively. The quasi-periodic K-H waves on both flanks have unambiguous low-density and high-speed patterns. The wave periods vary gradually on both flanks, with similar average periods (303 ± 107 s for MMS and 266 ± 102 s for THA). The lag time between the variations of the wave periods is close to the wave propagation time from THA to MMS, which suggests that the K-H waves generate and propagate quasi-symmetrically on both flanks. Larger local magnetic shear angles are observed on the trailing edges by MMS than by THA, which is probably due to the strong magnetic field distortion during the tailward propagation. The increased magnetic shear may excite magnetic reconnection, thus contributing to the formation of the low-latitude boundary layer.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Keyword
- plasmas
- waves
Publication and Content Type
- ref (subject category)
- art (subject category)
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- By the author/editor
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Lu, S. W.
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Wang, C.
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Li, Wenya Y.
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Tang, B. B.
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Torbert, R. B.
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Giles, B. L.
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show more...
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Russell, C. T.
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Burch, J. L.
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McFadden, J. P.
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Auster, H. U.
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Angelopoulos, V
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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Astrophysical Jo ...
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Uppsala University