Effect of the solar wind on the nature of arbitrary amplitude ion-acoustic solitary waves in Venus’ upper ionosphere

Salem, S.; Fayad, A. A.; El-Shafeay, Nora A.; Sayed, Fatema; Shihab, Mohammed; Fichtner, H.; Lazar, M.; Moslem, W. M.

doi:10.1093/mnras/stac2876

Cited by 3 publications

(11 citation statements)

References 54 publications

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“…Ion-acoustic wave exists when the condition, v thi < < v ph < < v the holds. Here, v thi and v the is the thermal velocity of the ions and electrons, respectively; v ph is the phase velocity of the wave (Salem et al 2022). The electrons move much more quickly in comparison to the waves and have sufficient time to maintain equal temperature everywhere.…”

Section: Theoretical Modelmentioning

confidence: 99%

“…Our model supports only positive potential solitons. Salem et al (2022) carried out parametric analysis for the existence domain of positive potential ion-acoustic solitons in the NM sector of the transition zone (the mantle, 1000-2000 km) existing between the ionosphere and the magnetosheath region of Venus. The soliton amplitude was observed to decrease with an increase in the temperature of either the solar wind protons or electrons.…”

Section: Comparison With Previous Theoretical Studies Of Thementioning

confidence: 99%

“…In this paper, we have analyzed the characteristics of both slow O + and H + ion-acoustic solitons in both NM and DD sectors. Furthermore, in the previous studies, the authors considered the fact that temperature of the solar wind electron and proton equalizes with that of the background Venusian electrons at altitudes less than 2000 km (Afify et al 2021;Salem et al 2022). In the absence of observational data for temperature variation with altitude, we have analyzed the characteristics of the solitons considering both higher solar wind electron temperature (Figures 2-7) and when the temperature of the solar wind particle equalizes that of the background Venusian electrons (Figures 8 and 9).…”

Section: Comparison With Previous Theoretical Studies Of Thementioning

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: Theoretical Modelmentioning

confidence: 99%

Section: Comparison With Previous Theoretical Studies Of Thementioning

confidence: 99%

Section: Comparison With Previous Theoretical Studies Of Thementioning

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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“…On the other hand, the role of the plasmas in Venus's ionosphere is studied by many authors [17][18][19][20][21]. The basic properties of the propagation of the nonlinear and fully nonlinear IAWs in the Venusian ionosphere are studied by Sayed et al [17].…”

Section: Introductionmentioning

confidence: 99%

“…Also, Fayad et al [20] investigated the effect of the gradients of the number density, the flow velocity and the magnetic field on the basic features of the propagated low-frequency electrostatic waves in the vicinity of Venus' terminator. Recently, Salem et al [21] investigated the effect of SW plasma parameters on the conditions of the propagated nonlinear IAWs in Venus' mantle region. Their results show that the amplitude of the solitary structures is enhanced by the SW proton's density or their velocity.…”

Section: Introductionmentioning

confidence: 99%

Role of solar wind on the ionic escaping from Venus upper ionosphere via plasma wakefield

El-Shafeay¹,

Moslem²,

El-Taibany³

et al. 2023

Phys. Scr.

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According to the observations that detected significant ionospheric escape from Venus, a test charge approach is suggested to explain the ionic loss caused by the solar wind (SW) interaction with the Venusian upper ionosphere. The proposed plasma system consists of two positive planetary ions ($ H^{+} $ and $ O^{+} $) with isothermal electrons and streaming SW protons, with Maxwellian electrons. The electrostatic Debye screening and wakefield potentials caused by a moving test charge as well as the modified dielectric constant of the ion-acoustic waves (IAWs) created in the model are derived. The normalized Debye potential is found to decrease exponentially with the axial distance. Whereas the amplitude of the wakefield potential is amplified with the altitudes and decreases with increasing the density of either planetary oxygen or the SW protons but it is enhanced by SW electrons number density. However, the wakefield amplitude is not affected by the SW protons velocity or their temperatures because the SW protons velocity is fast compared with the velocity of the plasma system. Thus, the properties of the ions escaping are affected by the velocity variations within a certain range called the velocity scale window. The obtained results are found to be in a good agreement with the observed data.

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Propagation of nonlinear ion-acoustic fluctuations in the mantle of Venus

Morsi,

Fayad,

Tolba

et al. 2024

A&A

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Motivated by the observations of ion-acoustic fluctuations with the Parker Solar Probe (PSP) and earlier by the Pioneer Venus Orbiter (PVO) in the Venusian magnetosheath, we investigate the nature of ion-acoustic solitary and double-layer (DL) structures in the mantle. We employed a hydrodynamic description along with reductive perturbation theory to derive the nonlinear Zakharov–Kuznetsov equation that elucidates the dynamics of three-dimensional ion-acoustic wave packets. Using the spacecraft measurements of the plasma configuration at Venus, we carried out a parametric analysis of these structures, including the influence of the magnetic field strength and the relative densities and temperatures, considering two cases: quasi-parallel and oblique propagation. Moreover, we determined the structural characteristics of these waves, where oblique (quasi-parallel) solitary waves have a potential of $0.4$ V ($0.4$ V) and a maximum electric field amplitude $E_m mV/m ($8$ mV/m) across spatial and temporal widths of $ km ($ 140-200$ m) and $0.4$ s ($1.6$ ms). These waves produce low-frequency electrostatic activity in the frequency range of $1.6-10$ Hz ($630-3160$ Hz). Quasi-parallel DLs have potential drops of ($6.5-13$) V and $E_m mV/m with a width and duration of $(100-120)$ m and $ 1$ ms, and a frequency range of $ Hz. These outcomes can explain the detected electrostatic fluctuations above the ionosphere via PVO in the frequency channels of $730$ Hz and $5.4$ kHz. Furthermore, the DL features estimated in this work are in line with the recent PSP measurements of the DLs propagating in the magnetosheath of Venus.

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Effect of the solar wind on the nature of arbitrary amplitude ion-acoustic solitary waves in Venus’ upper ionosphere

Cited by 3 publications

References 54 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

Role of solar wind on the ionic escaping from Venus upper ionosphere via plasma wakefield

Propagation of nonlinear ion-acoustic fluctuations in the mantle of Venus

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