Fast and Slow Mode Solitary Waves in a Five-Component Plasma

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• 作者：Sijo Sebastian ; Manesh Michael ; Sreekala G. ; Anu Varghese…
• 关键词：Cometary plasma ; Kappa distribution ; ZK equation ; Solitary waves
• 刊名：Brazilian Journal of Physics
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：47
• 期：1
• 页码：46-54
• 全文大小：
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics, general;
• 出版者：Springer US
• ISSN：1678-4448
• 卷排序：47

文摘

We have investigated fast- and slow-mode solitary profiles in a five-component plasma consisting of positively and negatively charged pair ions, hydrogen ions, and hotter and colder electrons. Of these, the heavier ions and colder photoelectrons are of cometary origin while the other components are of solar origin; the electrons are described by kappa distributions. The Zakharov-Kuznetsov (ZK) equation is derived, and solutions for fast- and slow-mode solitary structures are plotted for parameters relevant to comet Halley. We found that the presence of hydrogen ions determines the polarity of the fast- and slow-mode solitary structures. Also, variations of equilibrium number density of hydrogen ions and charge numbers on the heavier pair ions act differently on the fast- and slow-mode solitary structures. The addition of hydrogen ions significantly affects the amplitude of the solitary structures for the fast mode. Further, the cyclotron frequency of the lighter and heavier ions has a noticeable effect on the width of the solitary waves.