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Magnetospheric Mult...
Magnetospheric Multiscale Observations of an Ion Diffusion Region With Large Guide Field at the Magnetopause : Current System, Electron Heating, and Plasma Waves
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- Zhou, M. (författare)
- Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
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- Berchem, J. (författare)
- Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
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- Walker, R. J. (författare)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
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- El-Alaoui, M. (författare)
- Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA.
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- Goldstein, M. L. (författare)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.;Space Sci Inst, Boulder, CO USA.,Katholieke Univ Leuven, Dept Math, Ctr Plasma Astrophys, Leuven, Belgium,Royal Inst Technol, Dept Space & Plasma Phys, Stockholm, Sweden
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- Lapenta, G. (författare)
- Katholieke Univ Leuven, Dept Math, Ctr Plasma Astrophys, Leuven, Belgium.,NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
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- Deng, X. (författare)
- Nanchang Univ, Inst Space Sci & Technol, Nanchang, Jiangxi, Peoples R China.
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- Li, J. (författare)
- Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA.,Southwest Res Inst, San Antonio, TX USA
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- Le Contel, O. (författare)
- Univ Paris Sud, UPMC Univ Paris 06, CNRS, Lab Phys Plasmas,Ecole Polytech,Observ Paris, Paris, France.
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- Graham, D. B. (författare)
- Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
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- Lavraud, B. (författare)
- Univ Toulouse, CNRS, Inst Rech Astrophys & Planetol, UPS,CNES, Toulouse, France.
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- Paterson, W. R. (författare)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
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- Giles, B. L. (författare)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
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- Burch, J. L. (författare)
- Southwest Res Inst, San Antonio, TX USA.
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- Torbert, R. B. (författare)
- Univ New Hampshire, Dept Phys, Durham, NH 03824 USA.;Univ New Hampshire, Ctr Space Sci, Durham, NH 03824 USA.
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- Russell, C. T. (författare)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
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- Strangeway, R. J. (författare)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
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- Zhao, C. (författare)
- Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA.
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- Ergun, R. E. (författare)
- Univ Colorado, LASP, Boulder, CO 80309 USA.
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- Lindqvist, Per-Arne (författare)
- KTH,Rymd- och plasmafysik
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- Marklund, Göran (författare)
- KTH,Rymd- och plasmafysik
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Univ Calif Los Angeles, Dept Phys & Astron, Los Angeles, CA 90095 USA Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA. (creator_code:org_t)
- American Geophysical Union (AGU), 2018
- 2018
- Engelska.
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Ingår i: Journal of Geophysical Research - Space Physics. - : American Geophysical Union (AGU). - 2169-9380 .- 2169-9402. ; 123:3, s. 1834-1852
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- We report Magnetospheric Multiscale (MMS) observations of a reconnecting current sheet in the presence of a weak density asymmetry with large guide field at the dayside magnetopause. An ion diffusion region (IDR) was detected associated with this current sheet. Parallel current dominated over the perpendicular current in the IDR, as found in previous studies of component reconnection. Electrons were preferentially heated parallel to the magnetic field within the IDR. The heating was manifested as a flattop distribution below 400eV. Two types of electromagnetic electron whistler waves were observed within the regions where electrons were heated. One type of whistler wave was associated with nonlinear structures in E-|| with amplitudes up to 20mV/m. The other type was not associated with any structures in E-||. Poynting fluxes of these two types of whistler waves were directed away from the X-line. We suggest that the nonlinear evolution of the oblique whistler waves gave rise to the solitary structures in E-||. There was a perpendicular super-Alfvenic outflow jet that was carried by magnetized electrons. Intense electrostatic lower hybrid drift waves were localized in the current sheet center and were probably driven by the super-Alfvenic electron jet, the velocity of which was approximately equal to the diamagnetic drift of demagnetized ions. Our observations suggest that the guide field significantly modified the structures (Hall electromagnetic fields and current system) and wave properties in the IDR.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
Nyckelord
- magnetic reconnection
- dayside magnetopause
- ion diffusion region
- guide field
- plasma waves
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- art (ämneskategori)
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Till lärosätets databas
- Av författaren/redakt...
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Zhou, M.
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Berchem, J.
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Walker, R. J.
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El-Alaoui, M.
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Goldstein, M. L.
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Lapenta, G.
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visa fler...
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Deng, X.
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Li, J.
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Le Contel, O.
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Graham, D. B.
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Lavraud, B.
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Paterson, W. R.
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Giles, B. L.
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Burch, J. L.
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Torbert, R. B.
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Russell, C. T.
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Strangeway, R. J ...
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Zhao, C.
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Ergun, R. E.
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Lindqvist, Per-A ...
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Marklund, Göran
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