论文标题
一种测量流星质量指数的新方法：适用于2018 Daraconid Meteor淋浴爆发
A new method for measuring the meteor mass index: application to the 2018 Draconid meteor shower outburst
论文作者
论文摘要
语境。几位作者预测，2018年爆发了严厉的流星淋浴，但活动水平不确定。目标。光族观测用于得出严厉流星的种群和质量指数，通量和辐射位置。方法。使用高度敏感的电子乘电荷耦合器件（EMCCD）摄像机进行预测峰后的90分钟多站观测值。数据校准将详细讨论。开发了一种新型的最大似然估计方法，用于计算具有强大误差估计的人群和质量指数。我们将该方法应用于观察到的draconids，并使用该值来推导通量。计算流星轨迹并将其与流星射血模型的预测辐射位置进行了比较。结果。我们发现，在预测峰值之后，在30分钟的垃圾箱中的质量指数为$ 1.74 \ pm 0.18 $，在接下来的60分钟内为$ 2.32 \ pm 0.27 $。辐射的位置和散布与建模值非常匹配，但是太阳经度的$ 0.4^{\ circ} $的偏移。
Context. Several authors predicted an outburst of the Draconid meteor shower in 2018, but with an uncertain level of activity. Aims. Optical meteor observations were used to derive the population and mass indices, flux, and radiant positions of Draconid meteors. Methods. 90 minutes of multi-station observations after the predicted peak of activity were performed using highly sensitive Electron Multiplying Charge Coupled Device (EMCCD) cameras. The data calibration is discussed in detail. A novel maximum likelihood estimation method of computing the population and mass index with robust error estimation was developed. We apply the method to observed Draconids and use the values to derive the flux. Meteor trajectories are computed and compared to predicted radiant positions from meteoroid ejection models. Results. We found that the mass index was $1.74 \pm 0.18$ in the 30 minute bin after the predicted peak, and $2.32 \pm 0.27$ in the next 60 minutes. The location and the dispersion of the radiant matches well to modeled values, but there is an offset of $0.4^{\circ}$ in solar longitude.
