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<p>This paper focuses on exploring dust-acoustic solitary (DAS) waves in a plasma that includes negative dust fluid, nonthermal–nonextensive Cairns–Tsallis (CT) distributed electrons and Boltzmannian ions using Sagdeev pseudopotential formulism. In this study, we observed that the presence of CT-distributed electrons and thermal ions results in the occurrence of rarefactive solitons. It is found that the plasma parameters such as nonthermal spectral index <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\((\alpha )\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <mi>α</mi> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation>, nonextensive parameter (<i>q</i>), dust temperature <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\((\sigma \)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <mi>σ</mi> </mrow> </math></EquationSource> </InlineEquation>) and Mach number (<i>M</i>) significantly influence the solitary structures for DAS waves. In addition, the analytic results reveal an intricate combination between spectral indices <i>q</i> and <i>α</i>, dust temperature, drift velocity, electron number density and critical Mach number. Our results highlight the influence of CT distribution on the characteristics of space plasma waves, thereby improving our understanding of electrostatic nonlinear structures and the complexity of electrostatic waves in astrophysical plasmas.</p>

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Dust-acoustic solitary waves in plasmas with nonthermal–nonextensive electrons and Boltzmannian ions

  • 期刊论文

  • 发表日期：

    2025年10月3日

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  • A. A. Abid,
  • K. Qamer,
  • N. Ahmad,
  • M. S. Hussain,
  • M. N. S. Qureshi,
  • S. Ali,
  • Ommair Ishaque,
  • Xiaojie Li,
  • Guang-Rui Yao,
  • Yan-Fang Ji

摘要

This paper focuses on exploring dust-acoustic solitary (DAS) waves in a plasma that includes negative dust fluid, nonthermal–nonextensive Cairns–Tsallis (CT) distributed electrons and Boltzmannian ions using Sagdeev pseudopotential formulism. In this study, we observed that the presence of CT-distributed electrons and thermal ions results in the occurrence of rarefactive solitons. It is found that the plasma parameters such as nonthermal spectral index \((\alpha )\) ( α ) , nonextensive parameter (q), dust temperature \((\sigma \) ( σ ) and Mach number (M) significantly influence the solitary structures for DAS waves. In addition, the analytic results reveal an intricate combination between spectral indices q and α, dust temperature, drift velocity, electron number density and critical Mach number. Our results highlight the influence of CT distribution on the characteristics of space plasma waves, thereby improving our understanding of electrostatic nonlinear structures and the complexity of electrostatic waves in astrophysical plasmas.