Response of Banded Whistler Mode Waves to the Enhancement of Solar Wind Dynamic Pressure in the Inner Earth's Magnetosphere

Xiongdong Yu, Zhigang Yuan, Haimeng Li, Shiyong Huang, Dedong Wang, Fei Yao, H. O. Funsten, J. R. Wygant

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

With observations of Van Allen Probe A, in this letter we display a typical event where banded whistler waves shifted up their frequencies with frequency bands broadening as a response to the enhancement of solar wind dynamic pressure. Meanwhile, the anisotropy of electrons with energies about several tens of keV was observed to increase. Through the comparison of the calculated wave growth rates and observed wave spectral intensity, we suggest that those banded whistler waves observed with frequencies shifted up and frequency bands broadening could be locally excited by these hot electrons with increased anisotropy. The current study provides a great in situ evidence for the influence on frequencies of banded whistler waves by the enhancement of solar wind dynamic pressures, which reveals the important role of solar wind dynamic pressures playing in the frequency properties of banded whistler waves.

Original languageEnglish (US)
Pages (from-to)8755-8763
Number of pages9
JournalGeophysical Research Letters
Volume45
Issue number17
DOIs
StatePublished - Sep 16 2018

Keywords

  • banded whistler mode waves
  • frequency properties
  • inner
  • magnetosphere
  • solar wind dynamic pressure

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