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Low-frequency Whist...
Low-frequency Whistler Waves Modulate Electrons and Generate Higher-frequency Whistler Waves in the Solar Wind
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- Yao, S. T. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.;Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
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- Shi, Q. Q. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Zong, Q. G. (författare)
- Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
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- Degeling, A. W. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Guo, R. L. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Li, L. (författare)
- Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
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- Li, J. X. (författare)
- Univ Calif Los Angeles, Dept Atmospher & Ocean Sci, Los Angeles, CA USA.
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- Tian, A. M. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Zhang, H. (författare)
- Univ Alaska Fairbanks, Phys Dept, Fairbanks, AK 99775 USA.;Univ Alaska Fairbanks, Geophys Inst, Fairbanks, AK 99775 USA.
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- Yao, Z. H. (författare)
- Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China.
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- Fu, H. S. (författare)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China.
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- Liu, C. M. (författare)
- Beihang Univ, Sch Space & Environm, Beijing 100191, Peoples R China.
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- Sun, W. J. (författare)
- Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA.
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- Niu, Z. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Li, W. Y. (författare)
- Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China.
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- Liu, Z. Y. (författare)
- Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China.
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- Le Contel, O. (författare)
- Univ Paris Saclay, Lab Phys Plasmas, Obs Paris, Ecole Polytech,Inst Polytech Paris,CNRS, Paris, France.
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- Zhang, S. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Xiao, C. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Shang, W. S. (författare)
- Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China.
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- Torbert, R. B. (författare)
- Univ New Hampshire, Durham, NH 03824 USA.
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- Ergun, R. E. (författare)
- Univ Colorado, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
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- Lindqvist, Per-Arne (författare)
- KTH,Rymd- och plasmafysik
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- Pollock, C. J. (författare)
- NASA, Goddard Space Flight Ctr, Greenbelt, MD USA.
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Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China;Chinese Acad Sci, Natl Space Sci Ctr, State Key Lab Space Weather, Beijing 100190, Peoples R China. Shandong Univ, Inst Space Sci, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai 264209, Peoples R China. (creator_code:org_t)
- 2021-12-23
- 2021
- Engelska.
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Ingår i: Astrophysical Journal. - : American Astronomical Society. - 0004-637X .- 1538-4357. ; 923:2
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- The role of whistler-mode waves in the solar wind and the relationship between their electromagnetic fields and charged particles is a fundamental question in space physics. Using high-temporal-resolution electromagnetic field and plasma data from the Magnetospheric MultiScale spacecraft, we report observations of low-frequency whistler waves and associated electromagnetic fields and particle behavior in the Earth's foreshock. The frequency of these whistler waves is close to half the lower-hybrid frequency (similar to 2 Hz), with their wavelength close to the ion gyroradius. The electron bulk flows are strongly modulated by these waves, with a modulation amplitude comparable to the solar wind velocity. At such a spatial scale, the electron flows are forcibly separated from the ion flows by the waves, resulting in strong electric currents and anisotropic ion distributions. Furthermore, we find that the low-frequency whistler wave propagates obliquely to the background magnetic field ( B (0)), and results in spatially periodic magnetic gradients in the direction parallel to B (0). Under such conditions, large pitch-angle electrons are trapped in wave magnetic valleys by the magnetic mirror force, and may provide free perpendicular electron energy to excite higher-frequency whistler waves. This study offers important clues and new insights into wave-particle interactions, wave generation, and microscale energy conversion processes in the solar wind.
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)
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Till lärosätets databas
- Av författaren/redakt...
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Yao, S. T.
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Shi, Q. Q.
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Zong, Q. G.
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Degeling, A. W.
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Guo, R. L.
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Li, L.
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visa fler...
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Li, J. X.
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Tian, A. M.
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Zhang, H.
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Yao, Z. H.
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Fu, H. S.
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Liu, C. M.
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Sun, W. J.
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Niu, Z.
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Li, W. Y.
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Liu, Z. Y.
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Le Contel, O.
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Zhang, S.
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Xiao, C.
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Shang, W. S.
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Torbert, R. B.
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Ergun, R. E.
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Lindqvist, Per-A ...
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Pollock, C. J.
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visa färre...
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