论文标题
通过辐射扭矩对非球形彗星灰尘颗粒的旋转破坏
Rotational Disruption of Nonspherical Cometary Dust Particles by Radiative Torques
论文作者
论文摘要
对由天文学硅酸盐骨料组成的非球形粉尘颗粒合奏的响应进行了严格的统计数值分析。发现旋转破坏机制不仅可能发生，而且是解释许多单独观察到彗星灰尘的关键因素。也就是说，辐射扭矩显示在彗星活动的时间尺度内旋转和对齐彗星粉尘。此外，在某些条件下的辐射扭矩比对和破坏机制被证明与观察到尘埃的快速极化和灰尘的光谱融合一致。结果表明，在考虑彗星粉尘的演变时，应普遍考虑辐射扭矩。
Rigorous statistical numerical analysis of the response of a nonspherical dust particle ensemble composed of aggregates of astronomical silicate is presented. It is found that the rotational disruption mechanism is not only likely to occur but to be a key element in explaining many separate observations of cometary dust. Namely, radiative torques are shown to spin-up and align cometary dust within the timescales of cometary activity. Additionally, the radiative torque alignment and disruption mechanisms within certain conditions are shown to be consistent with observations of rapid polarization of dust and spectral bluing of dust. The results indicate that radiative torques should be taken into account nearly universally when considering the evolution of cometary dust.
