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Arbitrary amplitude dust-acoustic waves in Jupiter atmosphere
Results in Physics ( IF 5.3 ) Pub Date : 2020-12-31 , DOI: 10.1016/j.rinp.2020.103792
Haifa A. Al-Yousef , B.M. Alotaibi , R.E. Tolba , W.M. Moslem

Arbitrary amplitude dust-acoustic solitary waves in a dusty plasma in Jupiter atmosphere are expected to occur for distance greater than 15RJ, where RJ is the distance from the center of the Jupiter (RJ = 71398 km). We used the generalized hydrodynamic model for positive dust grains, Maxwellian electrons and ions those interact with solar wind protons and electrons. The energy-balance-like equation containing Sagdeev potential is derived and its numerical analysis is presented. The existence region of the arbitrary amplitude dust-acoustic solitary waves is defined. It is found that subsonic (Mach number <1) and supersonic (Mach number >1) acoustic waves can exist, but the dominant pulses are supersonic modes and the pulses have positive potential. The main effects to change the soliton existence region are the dust number density and the streaming solar wind protons parameters, via solar wind proton number density, temperature, and streaming speed. Increasing the dust grains number density leads to reduce the width and enhances the amplitude. For higher temperature solar wind proton, the solitary waves dwarfed and broader, while enhancement the solar wind proton number density and streaming speed leads to transfer more energy into the plasma that makes the pulses towering.



中文翻译:

木星大气中任意振幅的尘埃声波

在木星大气中尘埃等离子体中,任意振幅的尘埃声孤立波有望在距离大于 15[RĴ,在哪里 [RĴ 是距木星中心的距离([RĴ= 71398公里)。我们对与太阳风质子和电子相互作用的正尘埃颗粒,麦克斯韦电子和离子使用了广义流体动力学模型。推导了包含Sagdeev势能的类能量平衡方程,并进行了数值分析。定义了任意振幅的尘埃声孤立波的存在区域。发现亚音速(马赫数<1个)和超音速(马赫数 >1个虽然可以存在声波,但主要脉冲是超音速模式,并且脉冲具有正电势。通过太阳风质子数密度,温度和流速,改变孤子存在区域的主要影响是尘埃数密度和流动的太阳风质子参数。尘粒数密度的增加导致宽度减小并且振幅增大。对于温度较高的太阳风质子,孤波相形见and且更宽,而提高太阳风质子数密度和流动速度则导致将更多的能量转移到等离子体中,从而使脉冲耸立。

更新日期:2021-01-10
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