| Issue |
EPL
Volume 140, Number 2, October 2022
|
|
|---|---|---|
| Article Number | 23001 | |
| Number of page(s) | 7 | |
| Section | Fluid and nonlinear dynamics | |
| DOI | https://doi.org/10.1209/0295-5075/ac9b8b | |
| Published online | 07 November 2022 | |
Study of hydromagnetic solitary waves in the Earth's inner magnetosphere via the Adlam-Allen model
1 Department of Physics, Government College University - Lahore, 54000, Pakistan
2 OCIAM, Mathematical Institute - Oxford, OX2 6GG, UK
3 University College - Oxford, OX1 4BH, UK
(a) E-mail: gohar.abbas@gcu.edu.pk (corresponding author)
Received: 16 June 2022
Accepted: 19 October 2022
Solitary hydromagnetic waves propagating perpendicular to the ambient magnetic field are nonlinear structures that were first analysed by Adlam and Allen in 1958. Although they were first studied for electron-ion plasmas in the controlled thermonuclear reaction experiment, they can also occur in other plasma media. Satellite observations have confirmed that these large-amplitude hydromagnetic waves are ubiquitous in many space plasma environments. In this paper, using Sagdeev pseudopotential technique, we study the properties of large amplitude hydromagnetic waves using the physical model employed by Adlam-Allen. It is confirmed that the waves exist with Mach numbers within the range from 1 to 2. Applications to observations of di-polarization fronts (DFs) in the Earth's inner magnetosphere are discussed.
© 2022 EPLA
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