Numerical simulation study of dispersive waves in presence of magnetic islands

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Astrophysics and Space Science Pub Date : 2025-06-23 DOI:10.1007/s10509-025-04453-4

Neha Pathak, Jyoti, Suresh C. Sharma, R. P. Sharma

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Abstract

We have proposed wave modes physics to explain the power spectrum scaling in the magnetic presence of magnetic islands of the magnetopause. In the present manuscript, a model to study the role of waves in turbulence generation by taking the powerful whistler wave and weak KAW has been presented. The corresponding power spectrum, current sheet structures, and energy dissipation at magnetopause presence of magnetic islands are also analysed and discussed its relevance with observational data. This study is carried out numerically using the pseudospectral method here, space integration for spatial integrations and finite difference method for temporal integration have been used. To understand the physics behind the field localization, we developed a semianalytical model and got the development of electron and ion scale localization. Our study enhances the understanding of the role of wave-wave interaction physics in the presence of magnetic islands and the role of multi-scale physics in turbulence generation in space plasmas.

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磁岛存在下色散波的数值模拟研究

我们提出了波模式物理学来解释磁层顶磁岛磁存在时的功率谱缩放。本文提出了一种利用强哨声波和弱KAW来研究波浪在湍流产生中的作用的模型。分析了磁岛存在时磁层顶的功率谱、电流片结构和能量耗散，并讨论了其与观测资料的相关性。本文采用伪谱法进行数值计算，空间积分采用空间积分，时间积分采用有限差分法。为了理解场局域化背后的物理原理，我们建立了一个半解析模型，得到了电子和离子尺度局域化的发展。我们的研究增强了对波-波相互作用物理在磁岛存在中的作用以及多尺度物理在空间等离子体湍流产生中的作用的理解。

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来源期刊

Astrophysics and Space Science 地学天文-天文与天体物理

CiteScore

3.40

自引率

5.30%

发文量

106

审稿时长

2-4 weeks

期刊介绍： Astrophysics and Space Science publishes original contributions and invited reviews covering the entire range of astronomy, astrophysics, astrophysical cosmology, planetary and space science and the astrophysical aspects of astrobiology. This includes both observational and theoretical research, the techniques of astronomical instrumentation and data analysis and astronomical space instrumentation. We particularly welcome papers in the general fields of high-energy astrophysics, astrophysical and astrochemical studies of the interstellar medium including star formation, planetary astrophysics, the formation and evolution of galaxies and the evolution of large scale structure in the Universe. Papers in mathematical physics or in general relativity which do not establish clear astrophysical applications will no longer be considered. The journal also publishes topically selected special issues in research fields of particular scientific interest. These consist of both invited reviews and original research papers. Conference proceedings will not be considered. All papers published in the journal are subject to thorough and strict peer-reviewing. Astrophysics and Space Science features short publication times after acceptance and colour printing free of charge.