Evolution of ion-acoustic soliton waves in Venus’s ionosphere permeated by the solar wind

Afify, M. S.; Elkamash, I. S.; Shihab, Mohammed; Moslem, W. M.

doi:10.1016/j.asr.2021.02.037

Cited by 18 publications

(18 citation statements)

References 39 publications

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“…In the DD sector corresponding to higher altitude (10 3 -10 4 ) km, we also studied the variation in the soliton characteristics using the normalized parameters, viz., n vh0 = 0.53, n vo0 = 0.31, n sp0 = 0.16, σ vh = σ vo = 0.25, and σ sp = 1, σ be = 1, as given by Afify et al (2021), who normalized the number density with the background Venusian electron number density. Hence, we converted the number density to our normalization, i.e., equilibrium number density of ion/electrons.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…They reported that only compressive ion-acoustic solitons propagating with a speed of ∼2 km s −1 exists in the Venus ionosphere at the altitude 200-1000 km. Afify et al (2021) analyzed the linear and small amplitude nonlinear wave dynamics during the solar wind interaction with the upper atmosphere of the Venus. Using the reductive perturbation method, they predicted the electric field amplitude of the ESWs as 1.2 mV m −1 with time duration of 0.4 ms and proposed that these ESWs could provide a plausible explanation for the plasma oscillations detected during the Galileo flyby of Venus (Gurnett et al 1991).…”

Section: Introductionmentioning

confidence: 99%

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Electrostatic Solitary Waves in the Venusian Ionosphere Pervaded by the Solar Wind: A Theoretical Perspective

Rubia

Singh

Lakhina

et al. 2023

ApJ

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Electrostatic solitary waves (ESWs) in the Venusian ionosphere that are impinged by the solar wind are investigated using a homogeneous, collisionless, and magnetized multicomponent plasma consisting of Venusian H+ and O+ ions, Maxwellian Venusian electrons and streaming solar wind protons, and suprathermal electrons following κ − distribution. The model supports the propagation of positive potential slow O+ and H+ ion-acoustic solitons. The evolution and properties of the solitons occurring in two sectors, viz., dawn-dusk and noon-midnight sector of the Venus ionosphere at an altitude of (200–2000) km, are studied. The theoretical model predicts positive potential solitons with amplitude ∼(0.067–56) mV, width ∼(1.7–53.21) m, and velocity ∼(1.48–8.33) km s−1. The bipolar soliton electric field has amplitude ∼(0.03–27.67) mV m−1 with time duration ∼(0.34–22) ms. These bipolar electric field pulses when Fourier transformed to the frequency domain occur as a broadband electrostatic noise, with frequency varying in the range of ∼9.78 Hz–8.77 kHz. Our results can explain the observed electrostatic waves in the frequency range of 100 Hz–5.4 kHz in the Venus ionosphere by the Pioneer Venus Orbiter mission. The model can also be relevant in explaining the recent observation of ESWs in the Venus magnetosheath by the Solar Orbiter during its first gravity assist maneuver of Venus.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electrostatic Solitary Waves in the Venusian Ionosphere Pervaded by the Solar Wind: A Theoretical Perspective

Rubia

Singh

Lakhina

et al. 2023

ApJ

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“…[22] Moreover, several waves such as Langmuir waves, upper hybrid waves, and electron cyclotron waves had been observed in the separatrix of magnetotail reconnection and magnetosheath separatrices. [23][24][25] Electrostatic solitary waves have been ubiquitous in space plasmas since 1982 [26,27] and references therein. Pickett et al [28] reported the propagation of bipolar and tripolar solitary waves from the bow shock to the magnetopause.…”

Section: Introductionmentioning

confidence: 99%

“…Electrostatic solitary waves have been ubiquitous in space plasmas since 1982 [ 26,27 ] and references therein. Pickett et al [ 28 ] reported the propagation of bipolar and tripolar solitary waves from the bow shock to the magnetopause.…”

Section: Introductionmentioning

confidence: 99%

The mechanism that drives electrostatic solitary waves to propagate in the Earth's magnetosphere and solar wind

Afify

Tolba

Moslem

2022

Contributions to Plasma Physics

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The origin of the solitary waves in the Earth's magnetosphere and the solar wind, particularly close to the magnetic reconnection (MR) regions, is still an open question. For that purpose, we used the fluid model to obtain the mechanism behind the formation of solitary waves in space plasmas with a variety of components. Our findings reveal that at the separatrix of the MR in the Earth's magnetotail, the counter-ejected electron beam leads to a broadening of the pulse amplitude. While increasing the electron beam positive velocity causes a bit increase in the soliton amplitude. Moreover, we observed that the soliton profile is very sensitive to the plasma parameters like density and temperature. The calculated electric field using the current model and the measured electric field in the Earth's magnetosphere and solar wind is highlighted.

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“…Electrostatic solitary waves have been ubiquitous in space plasmas since 1982. ( [20,21] and references therein) . Pickett et al [22] reported the propagation of bipolar and tripolar solitary waves from the bow shock to the magnetopause.…”

Section: Introductionmentioning

confidence: 99%

The mechanism that drives electrostatic solitary waves to propagate in the Earth's magnetosphere and solar wind

Afify¹,

Tolba²,

Moslem³

2022

Preprint

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The origin of the solitary waves in the Earth's magnetosphere and the solar wind, particularly close to the magnetic reconnection regions, is still an open question. For that purpose, we used the fluid model to obtain the mechanism behind the formation of solitary waves in space plasmas with a variety of components. Our findings reveal that at the separatrix of the magnetic reconnection in the Earth's magnetotail, the counter-ejected electron beam leads to a broadening of the pulse amplitude. While increasing the electron beam positive velocity causes a bit increase in the soliton amplitude. Moreover, we observed that the soliton profile is very sensitive to the plasma parameters like density and temperature. The calculated electric field using the current model and the measured electric field in the Earth's magnetosphere and solar wind is highlighted.

show abstract

Evolution of ion-acoustic soliton waves in Venus’s ionosphere permeated by the solar wind

Cited by 18 publications

References 39 publications

Electrostatic Solitary Waves in the Venusian Ionosphere Pervaded by the Solar Wind: A Theoretical Perspective

Electrostatic Solitary Waves in the Venusian Ionosphere Pervaded by the Solar Wind: A Theoretical Perspective

The mechanism that drives electrostatic solitary waves to propagate in the Earth's magnetosphere and solar wind

The mechanism that drives electrostatic solitary waves to propagate in the Earth's magnetosphere and solar wind

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