Ion-acoustic waves at the night side of Titan's ionosphere: higher-order approximation

被引：7

作者：

Ahmed, S. M. ^{[1
]}

Hassib, E. R. ^{[1
]}

Abdelsalam, U. M. ^{[2
,3
]}

Tolba, R. E. ^{[4
]}

Moslem, W. M. ^{[4
,5
]}

机构：

[1] Suez Univ, Dept Math, Fac Sci, Suez, Egypt

[2] Fayoum Univ, Dept Math, Fac Sci, Al Fayyum, Egypt

[3] Rustaq Coll Educ, Dept Math, Al Rustaq, Oman

[4] BUE, Ctr Theoret Phys, Cairo, Egypt

[5] Port Said Univ, Dept Phys, Fac Sci, Port Said 42521, Egypt

来源：

COMMUNICATIONS IN THEORETICAL PHYSICS | 2020年 / 72卷 / 05期

关键词：

plasmas; ion-acoustic waves; planets and satellites; atmospheres; SOLITARY;

D O I：

10.1088/1572-9494/ab7701

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Nonlinear solitary waves are investigated for a plasma system at the night side of Titan's ionosphere. The plasma model consists of three positive ions, namely C2H5+, HCNH+, and C3H5+, as well as Maxwellian electrons. The basic set of fluid equations is reduced to a Korteweg de-Vries (KdV) equation and linear inhomogeneous higher order KdV (LIHO-KdV) equation. The solitary wave solutions of both equations are obtained using a renormalization method. The solitary waves' existence region and the wave profile are investigated, and their dependences on the plasma parameters at the night side of Titan's ionosphere are examined. The solitary waves' phase velocities are subsonic or supersonic, and the propagating pulses are usually positive. The effect of higher-order corrections on the perturbation theory is investigated. It is found that the higher-order contribution makes the amplitude slightly taller, which is suitable for describing the solitary waves when the amplitude augments.

引用

页数：8

共 18 条

[1]

Abdelsalam UM, 2018, REV MEX ASTRON ASTR, V54, P363

[2]

Abdelsalam UM, 2013, J PLASMA PHYS, V79, P287, DOI [10.1017/S0022377812000991, 10.1017/S0022377812000992]

[3] Discovery of heavy negative ions in Titan's ionosphere [J].