Localization of Ultra-Low Frequency Waves in Multi-Ion Plasmas of the Planetary Magnetosphere

• Published in: Journal of astronomy and space sciences pp. 289 - 295
• Main Authors: Eun-Hwa Kim, Jay R. Johnson, 이동훈
• Format: Journal Article
• Language: English
• Published: 한국우주과학회 01.12.2015
• Subjects: 천문학
• ISSN: 2093-5587; 2093-1409
• DOI: 10.5140/JASS.2015.32.3.189

By adopting a 2D time-dependent wave code, we investigate how mode-converted waves at the Ion-Ion Hybrid (IIH) resonance and compressional waves propagate in 2D density structures with a wide range of field-aligned wavenumbers to background magnetic fields. The simulation results show that the mode-converted waves have continuous bands across the field line consistent with previous numerical studies. These waves also have harmonic structures in frequency domain and are localized in the field-aligned heavy ion density well. Our results thus emphasize the importance of a field-aligned heavy ion density structure for ultra-low frequency wave propagation, and suggest that IIH waves can be localized in different locations along the field line. KCI Citation Count: 0