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Comparative Study o...
Comparative Study of Dayside Pulsating Auroras Induced by Ultralow-Frequency Waves
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- Li, Xing-Yu (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.
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- Zong, Qiu-Gang (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.;Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China.
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- Liu, Jian-Jun (författare)
- Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China.
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- Yin, Ze-Fan (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.;Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China.
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- Hu, Ze-Jun (författare)
- Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China.
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- Zhou, Xu-Zhi (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.
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- Yue, Chao (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.
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- Liu, Zhi-Yang (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.
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- Zhao, Xing-Xin (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.;Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China.
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- Xie, Zi-Kang (författare)
- Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.
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- Blake, J. Bernard (författare)
- Aerosp Corp, Space Sci Applicat Lab, El Segundo, CA 90245 USA.
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- Russell, Christopher T. (författare)
- Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA.
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- Ergun, Robert E. (författare)
- Univ Colorado Boulder, Dept Astrophys & Planetary Sci, Boulder, CO 80309 USA.
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- Lindqvist, Per-Arne (författare)
- KTH,Rymd- och plasmafysik
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Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China Peking Univ, Inst Space Phys & Appl Technol, Beijing 100871, Peoples R China.;Polar Res Inst China, MNR Key Lab Polar Sci, Shanghai 200136, Peoples R China. (creator_code:org_t)
- MDPI AG, 2023
- 2023
- Engelska.
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Ingår i: Universe. - : MDPI AG. - 2218-1997. ; 9:6
- Relaterad länk:
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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
- Pulsating auroras are usually observed with ultralow-frequency (ULF) waves in the Pc 3-5 band (period 10-600 s). These auroras are thought to result from interactions between energetic electrons and chorus waves, but their relationship with ULF waves remains an open question. In this study, we investigated this question by conducting a comparative study on two ULF wave events with pulsating auroras observed near the magnetic footprints. Conjugate observations from the Magnetospheric Multiscale mission and the Chinese Yellow River Station were used. In both events, lower-band chorus waves were observed, which were suggested to be connected with the auroral pulsations by wavelet analysis. The intensity of these waves oscillates at the period of the ULF waves, but the physics laid behind them differs by events. During the event of 22 January 2019, compressional ULF waves changed the threshold for the whistler anisotropy instability periodically, affecting the emission of chorus waves. In the event on 10 January 2016, poloidal ULF waves modulated the chorus wave generation by regulating electron temperature anisotropy through drift resonance. ULF waves in these events may originate from perturbations in the solar wind. We highlight the role of ULF waves in the solar wind-magnetosphere-ionosphere coupling, which requires further study.
Ämnesord
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Nyckelord
- ultralow-frequency wave
- chorus wave
- pulsating aurora
- dayside aurora
- wave-particle interaction
- drift resonance
- dayside magnetosphere
- outer magnetosphere
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Li, Xing-Yu
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Zong, Qiu-Gang
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Liu, Jian-Jun
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Yin, Ze-Fan
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Hu, Ze-Jun
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Zhou, Xu-Zhi
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Yue, Chao
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Liu, Zhi-Yang
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Zhao, Xing-Xin
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Xie, Zi-Kang
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Blake, J. Bernar ...
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Russell, Christo ...
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Ergun, Robert E.
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Lindqvist, Per-A ...
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