The effect of ion drag on the pulsational mode of gravitational collapse (PMGC) is investigated within the partially charged dusty plasma model by fluid dynamics. It is found that the ion drag force significantly enhances the instability of the PMGC. In addition, it is shown that the instability of the PMGC is influenced by the ratio of the abundances of charged to neutral grains. These results can be relevant for the planetesimal formation in dark interstellar clouds.

中文翻译：

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离子阻力对引力坍缩脉动模式的影响

在部分带电尘埃等离子体模型中，通过流体动力学研究了离子阻力对引力坍缩 (PMGC) 脉动模式的影响。发现离子拖曳力显着增强了 PMGC 的不稳定性。此外，研究表明 PMGC 的不稳定性受带电颗粒与中性颗粒丰度比的影响。这些结果可能与暗星际云中的星子形成有关。