包括带电尘埃粒子影响的磁热凝结模式
Magneto-thermal condensation modes including the effects of charged dust particles
摘要：
研究了带电尘埃粒子在磁化和部分电离等离子体中的热不稳定性。我们的线性分析表明，在尘埃粒子的存在下的不稳定模式的增长率强烈地依赖于冷却速率和修改后的尘埃-回旋频率的比率。如果冷却速率小于修正的尘埃-回旋频率，则凝结模式的增长速率不会由于带电尘埃粒子的存在而修正。但当冷却速率大于（或相当于）修正的尘埃-回旋频率时，由于尘埃粒子的存在，不稳定模的增长速率增加。此外，对应于最大增长率的扰动的波数移动到较小的值（较大的波长）的冷却速率变得大于修改后的尘埃-回旋频率。我们表明，凝结模式的增长率随着尘埃颗粒的电荷而增加。
英文摘要：
We study thermal instability in a magnetized and partially ionized plasma with charged dust particles. Our linear analysis shows that the growth rate of the unstable modes in the presence of dust particles strongly depends on the ratio of the cooling rate and the modified dust-cyclotron frequency. If the cooling rate is less than the modified dust-cyclotron frequency, then growth rate of the condensation modes does not modify due to the existence of the charged dust particles. But when the cooling rate is greater than (or comparable to) the modified dust-cyclotron frequency, the growth rate of unstable modes increases because of the dust particles. Also, wavenumber of the perturbations corresponding to the maximum growth rate shifts to the smaller values (larger wavelengths) as the cooling rate becomes larger than the modified dust-cyclotron frequency. We show that growth rate of the condensation modes increases with the electrical charge of the dust particles.
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