Abstract
The governing dynamical equations of the right-handed circularly polarized dispersive Alfvén wave (DAW), which becomes dispersive owing to the finite frequency of the wave, and the slow Alfvén wave have been obtained using a two-fluid model. The wave localization at different instants of time and its power spectrum have been investigated. The ponderomotive force associated with the pump wave results in intense localized structures. The steepening of spectra is observed from the inertial range to the dispersive range. The results imply that the DAW may play a significant role in solar-wind turbulence. In addition, the formation of DAW localized structures is further examined considering two primary approaches, parametric instability (filamentation) and the reconnection-based model, to study the impact on the turbulent spectrum in more detail.
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This work was partially supported by the Indian Space Research Organization (ISRO) under the RESPOND program and the Department of Science and Technology (DST), India.
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Nandal, P., Sharma, S., Yadav, N. et al. Formation of Coherent Structures and Impact on Turbulence Scaling in Solar-Wind Plasma. Sol Phys 291, 3765–3775 (2016). https://doi.org/10.1007/s11207-016-0987-x
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DOI: https://doi.org/10.1007/s11207-016-0987-x