https://doi.org/10.1140/epjp/s13360-024-05036-y
Regular Article
Nonlinear propagation of whistler-mode in the presence of magnetic Islands in the magnetopause
1
Plasma and Nano-Simulation Lab, Department of Applied Physics, Delhi Technological University, Shahbad Daulatpur, Bawana Road, 110042, Delhi, India
2
Plasma Simulation Laboratory, Department of Energy Science and Engineering, Indian Institute of Technology Delhi, 110016, Hauz Khas, New Delhi, Delhi, India
Received:
15
July
2023
Accepted:
25
February
2024
Published online:
18
March
2024
We develop a framework for studying the nonlinear whistler wave at magnetic reconnection sites generated by energetic electron beam in the presence of magnetic islands as well as the nonlinearity. The governing model equation has been derived using the two-fluid model in the presence of the equilibrium magnetic field, consisting of a guide field and magnetic field due to magnetic islands. The dynamical equation for this nonlinear whistler wave has been solved numerically for the magnetopause region parameters. The findings obtained from simulation show that the contour plot of vector potential and current sheet formation is a result of nonlinearity and field perturbation. The numerically determined spectrum shows an inertial range with a spectral index of nearly − 5/3, followed by steeper scaling. This steepening in the turbulent spectrum is a characteristic of energy transit from larger to smaller scales. A new perspective on the scale size of current sheet is provided by our innovative approach for studying nonlinear whistler by energetic electron beam at the magnetic reconnection locations.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2024. Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
