Electrostatic supersolitary waves: A challenging paradigm in nonlinear plasma science and beyond – State of the art and overview of recent results

Varghese, Steffy Sara; Singh, Kuldeep; Kourakis, Ioannis

doi:10.1016/j.fpp.2024.100048

Cited by 1 publication

(3 citation statements)

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“…Both the qualitative and quantitative outcomes of this research show good agreement with ESW features observed in the magnetosheath region. This study is therefore relevant in modeling the dynamical characteristics of nonlinear waves in the magnetosheath and also aims at highlighting the possibility for the occurrence of supersolitary structures (Varghese et al 2024) in magnetospheric measurements, an aspect often overlooked in the past. Similar qualitative results may be observed in other planetary magnetospheres (Varghese et al 2023).…”

Section: Discussionmentioning

confidence: 99%

“…An interesting occurrence in multicomponent plasmas is the relatively recent paradigm of supersolitary waves (SSWs), or supersolitons, distinguished by a characteristic distorted curly structure in their E-field pulse profile (Varghese et al 2024) It was initially postulated that a plasma model comprising a minimum of five constituent components was required for the formation of SSW structures by Dubinov & Kolotkov (2012a, 2012b. However, it was soon realized that these structures might occur in simpler plasma settings, e.g., in a three-component plasma consisting of positive and negative ions alongside Cairns distributed electrons, as shown by Verheest et al (2013), or in a three-component dusty plasma, as shown independently by Dubinov & Sazonkin (2013).…”

Section: Introductionmentioning

confidence: 99%

“…In recent years, several theoretical frameworks have been developed to explore the existence criteria and the characteristics of SSWs, along with their potential consequences in various plasma environments (Dutta et al 2014;Ghosh & Iyengar 2014;Rufai et al 2014;Singh & Lakhina 2015;Varghese & Ghosh 2016;Olivier et al 2017Olivier et al , 2018Steffy & Ghosh 2017Varghese et al 2024). Recently, the condition for the existence of supersolitons was investigated, from first principles, in Earth's auroral region (Varghese et al 2022) and in Saturn's magnetosphere (Varghese et al 2023).…”

Section: Introductionmentioning

confidence: 99%

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Oblique Electrostatic Solitary and Supersolitary Waves in Earth’s Magnetosheath

Singh,

Varghese,

Saini

et al. 2024

ApJ

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Nonlinear electrostatic solitary waves (ESWs) are routinely detected at various regions of Earth’s magnetosphere using the Wideband Data plasma wave receivers mounted on board the Cluster satellite(s). This mission has facilitated the observation and analysis of ESW characteristics, such as amplitude and temporal duration within the magnetosheath, while concurrently determining the density and temperature profiles of energetic electrons. These electron parameters, in conjunction with data from ion experiments, have served as input for the ion-acoustic solitary wave model developed in this article, with the ambition to contribute to the understanding of ESW generation mechanisms. Assuming as the starting point a plasma system comprising inertial ion fluid and kappa-distributed electron populations of different temperatures (i.e., “cold” and “hot” electrons), a nonperturbative approach has been adopted to investigate the existence and properties of solitary waves. A thorough parametric investigation has scrutinized the existence conditions for such localized structures in terms of the plasma configuration parameters. An interesting aspect emerges from the analysis, namely, the possibility for the coexistence of positive and negative polarity structures associated with ion-acoustic modes, in fact, manifested as simultaneously occurring positive polarity supersolitary waves and negative polarity regular solitary waves. Furthermore, our study has investigated the combined effect of the magnetic field strength, electron density, and suprathermal electron statistics on wave dynamics. The outcomes of this research are in agreement with observed electrostatic wave phenomena in the magnetosheath region, thus underscoring the intrinsic relevance of electrostatic supersolitary structures in data obtained by Cluster and other satellite missions.

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Section: Discussionmentioning

confidence: 99%