论文标题
表征白天的六体流星淋浴并揭示了phaethon-geminid溪流复合体的性质
Characterizing the Daytime Sextantids Meteor Shower and Unveiling the Nature of the Phaethon-Geminid Stream Complex
论文作者
论文摘要
白天六烷流星淋浴是Phaethon-Geminid溪流复合物（PGC）的一部分，与双子座密切相关，双子座目前是地球上最强的流星淋浴。 DSX具有与小行星2005 UD相似的轨道，但协会的性质尚不清楚。从光学数据中，我们发现DSX流星的渗透类似于双子座，这表明它们也很高，并且与共同的起源一致。从雷达数据中，我们通过应用新颖的凸赫尔方法来确定流构件资格分离了19,007个DSX轨道。我们发现在峰值上，平均半轴轴接近1 au，偏心率为0.86，两者均降低是太阳经度的函数。倾斜度在峰值处平均为25度，但随着时间的推移增加。引人注目的DSX活动从太阳经度173-196 $^{\ circ} $延伸，在186-189 $^{\ circ} $之间的通量高原。 The peak flux is $2 \pm 0.05 \times 10^{-3}$ km$^{-2}$ hr$^{-1}$, equivalent to a ZHR of 20. We estimate a true differential mass index for the shower of $s = 1.64 \pm 0.06$ at the time of peak and an average of $1.70 \pm 0.07$ for days surrounding the peak. DSX流的质量估计为$ 10^{16} $ g，与2005 UD相同的顺序，表明该流太庞大了，无法由2005年UD的近期Meteoroid生产产生。我们建议DSX和2005 UD是在创建3200 Phaethon的同一分手事件中创建的。
The Daytime Sextantids meteor shower, part of the Phaethon-Geminid Stream Complex (PGC), is closely related to the Geminids, currently the strongest meteor shower visible at the Earth. The DSX share a similar orbit to asteroid 2005 UD, but the nature of the association remains unclear. From optical data we find that DSX meteors ablate similarly to Geminids, suggesting that they are also high density and consistent with a common origin. From radar data we have isolated 19,007 DSX orbits through application of a novel convex hull approach to determine stream membership. We find at the peak the mean semi-major axis is near 1 AU, eccentricity is 0.86 and that both decrease as a function of solar longitude. The inclination averages 25 degrees at the peak but increases over time. Noticeable DSX activity extends from solar longitude 173-196$^{\circ}$ with a flux plateau between 186 - 189$^{\circ}$. The peak flux is $2 \pm 0.05 \times 10^{-3}$ km$^{-2}$ hr$^{-1}$, equivalent to a ZHR of 20. We estimate a true differential mass index for the shower of $s = 1.64 \pm 0.06$ at the time of peak and an average of $1.70 \pm 0.07$ for days surrounding the peak. The mass of the DSX stream is estimated to be $10^{16}$ g, the same order as 2005 UD, suggesting the stream is too massive to have been created by recent meteoroid production from 2005 UD. We propose that the DSX and 2005 UD were created in the same break-up event that created 3200 Phaethon.
