双峰光变曲线流星的特性
Properties of meteors with double peaked light curves
摘要：
利用加拿大自动流星观测台跟踪系统收集的观测资料，对21颗具有双峰光变曲线的流星进行了分析。每个事件都有轨道信息、测光和至少一次高分辨率观测。两种不同的光变曲线形状被发现：突然的双峰曲线，和平滑的双峰曲线。突然的峰值曲线是由小行星轨道上的物体产生的，大多显示出明显的碎裂，而平滑的峰值曲线是由彗星流星体产生的，大多显示出很少或没有可见的碎裂。试图将这些流星模拟为具有两种化学成分的单体是不成功的，这意味着碎片必须包括在流星体烧蚀模型中。
英文摘要：
Twenty-one meteors showing double peaked light curves were analysed with observations collected with the Canadian Automated Meteor Observatory tracking system. Each event has orbital information, photometry, and at least one high-resolution observation. Two distinct light curve shapes were found: sudden double peaked curves, and smooth double peaked curves. The sudden peaked curves were produced by objects on asteroidal orbits and mostly showed noticeable fragmentation, while the smooth peaked curves were produced by cometary meteoroids and predominantly showed little to no visible fragmentation. An attempt to model these meteors as single bodies with two chemical components was unsuccessful, implying that fragmentation must be included in meteoroid ablation models.
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