Large Amplitude Electrostatic (Un)modulated Excitations in Anisotropic Magnetoplasmas: Solitons and Freak Waves

Alyousef, Haifa A.; Khalid, Muhammad; Ata-ur-Rahman, Ata-ur-Rahman; El-Tantawy, S. A.

doi:10.1007/s13538-022-01199-0

Cited by 5 publications

(1 citation statement)

References 69 publications

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“…Khalid et al [36] used Maxwellian electrons to investigate the modulation of multidimensional waves in anisotropic e − i plasma. Similarly, Alyousef et al have also used Sagdeev approach to study the IASWs in magnetoplasma [37]. In [38] Sagdeev approach is utilized and IASWs in magnetized e-i plasma in the presences of pressure anisotropy is discussed.…”

Section: Introductionmentioning

confidence: 99%

Oblique propagation of arbitrary amplitude ion acoustic solitary waves in anisotropic electron positron ion plasma

Almas

Ata-ur-Rahman²,

Khalid³

et al. 2023

Front. Phys.

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The oblique propagation of arbitrary ion acoustic solitary waves (IASWs) in magnetized electron-positron-ion plasmas is investigated by employing Sagdeev pseudopotential approach. Ions are assumed to be adiabatic having anisotropic thermal pressure. Electrons and positrons are considered to be isothermal, following Maxwellian distribution. In terms of electrostatic potential, Sagdeev potential function is obtained and analyzed numerically in the context of relevant plasma configuration parameters. The existence region of solitary pulses is defined accurately. It is investigated how several plasma configuration parameters, such as the positron concentration, parallel, and perpendicular ion pressure affect soliton characteristics.

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Section: Introductionmentioning

confidence: 99%

Oblique propagation of arbitrary amplitude ion acoustic solitary waves in anisotropic electron positron ion plasma

Almas

Ata-ur-Rahman²,

Khalid³

et al. 2023

Front. Phys.

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Head-on collision of ion-acoustic (modified) Korteweg–de Vries solitons in Saturn's magnetosphere plasmas with two temperature superthermal electrons

Hashmi,

Jahangir,

Masood

et al. 2023

Physics of Fluids

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In view of the recent observations by plasma science-spacecraft-voyager and Cassini plasma spectrometer of Saturn's magnetosphere, the interaction between two counter-propagating ion-acoustic (IA) solitons is studied in an unmagnetized plasma consisting of warm adiabatic ions in addition to hot and cold electrons following kappa distribution. The head-on collision of the IA solitons is investigated using the extended Poincare–Lighthill–Kuo technique. Since this model supports both compressive and rarefactive solitons, therefore, the soliton collisions for both Korteweg–de Vries (KdV) and the modified KdV (mKdV) equations are investigated. The corresponding phase shifts after the collision for both these equations are also derived and examined. Furthermore, the effects of different plasma parameters (corresponding to Saturn's magnetosphere), including superthermality, density, and temperature on the colliding soliton profiles and their phase shifts, are examined. It is concluded that the phase shift is smaller when both hot and cold electrons are Maxwellian by comparison with the superthermal case.

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Effect of ions anisotropy pressure on the ion-acoustic cnoidal waves in electron–positron–ion magnetoplasmas

Alrowaily,

Khalid,

Kabir

et al. 2024

AIP Advances

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The main objective of this work is to investigate the characteristics and behavior of the ion-acoustic cnoidal waves (IACWs) in an electron–positron–ion magnetoplasma having inertial positive ions with anisotropic thermal pressure and inertialess Maxwellian positrons and electrons. We utilize the reductive perturbation technique to reduce the fluid governing equations of the present model into the Korteweg–de Vries (KdV) equation in order to achieve this objective. We calculate the periodic solution of the KdV equation, also referred to as the cnoidal wave. We investigate the impact of various related parameters, including ion pressure anisotropy, positron concentrations, and temperature ratio, on the properties of IACWs. This study, particularly in the near-Earth magnetosheath and magnetosphere, may offer an insightful analysis of space and astrophysical plasma systems displaying ion pressure anisotropy.

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Large Amplitude Electrostatic (Un)modulated Excitations in Anisotropic Magnetoplasmas: Solitons and Freak Waves

Cited by 5 publications

References 69 publications

Oblique propagation of arbitrary amplitude ion acoustic solitary waves in anisotropic electron positron ion plasma

Oblique propagation of arbitrary amplitude ion acoustic solitary waves in anisotropic electron positron ion plasma

Head-on collision of ion-acoustic (modified) Korteweg–de Vries solitons in Saturn's magnetosphere plasmas with two temperature superthermal electrons

Effect of ions anisotropy pressure on the ion-acoustic cnoidal waves in electron–positron–ion magnetoplasmas

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