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On the Characteristics of Magnetosonic Waves in a Spin-Polarized Degenerate Electron–Positron–Ion Plasma
IEEE Transactions on Plasma Science ( IF 1.5 ) Pub Date : 2021-06-10 , DOI: 10.1109/tps.2021.3083666
Z. Iqbal , Imran A. Khan , Tajammal H. Khokhar , G. Murtaza

The linear properties of magnetosonic waves are studied by using the separated spin evolution quantum hydrodynamic equations in which each electron and positron are treated as two different fluids. At the perpendicular propagation, we have only one magnetosonic wave which is affected by both spin polarization and concentration of positron. In the case of oblique propagation, we solve dispersion numerically and found that three wave solutions are obtained without taking into account separate spin evolution (SSE), but the oblique propagation with SSE gives five wave solutions, two of them are electron and positron spin-dependent wave solutions and have been reported for the first time. It is noted that the spin polarization and positron concentration reduce the phase velocities of the obliquely propagating spectra. Moreover, it is seen that the obliqueness effect enhances the frequency of all waves. Finally, the comparison with earlier reported results is also presented. For numerical analysis, we choose parameters relevant to astrophysical environments.

中文翻译:

自旋极化简并电子-正电子-离子等离子体中磁声波的特性

通过使用分离的自旋演化量子流体动力学方程研究磁声波的线性特性,其中每个电子和正电子被视为两种不同的流体。在垂直传播时,我们只有一个磁声波,它受到自旋极化和正电子浓度的影响。在斜向传播的情况下,我们数值求解色散,发现在不考虑分离自旋演化(SSE)的情况下得到了三个波解,但是带有SSE的斜向传播给出了五个波解,其中两个是电子和正电子自旋-依赖波解决方案,并已被首次报道。值得注意的是,自旋极化和正电子浓度降低了倾斜传播光谱的相速度。而且,可以看出,倾斜效应增强了所有波的频率。最后,还介绍了与早期报告结果的比较。对于数值分析,我们选择与天体物理环境相关的参数。
更新日期:2021-07-23
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