论文标题
使用NASA全套火球网络测量流星阵雨的磁通量
Measuring Fluxes of Meteor Showers with the NASA All-Sky Fireball Network
论文作者
论文摘要
我们提出了一种开发的算法，以测量NASA的全套火球网络摄像机中观察到的主要流星阵雨的通量。全天空摄像机的通量测量不仅提高了流星环境办公室（MEO）提供准确的风险评估的能力，还可以限制淋浴内的麦克体量。该算法是针对特定淋浴和特定事件的曝光时间以及夜间的天空收集区域，在那里观察到足够大的淋浴流星样本（$ \ sim 30 $或更多）。计算了2015年双子座，2016年的Perseid和Quadrantid，2017年Orionid和2018 Leonid Shower Peaks的全天空火球网络的通量。所有这五个淋浴通量都与不同质量和光度限制下的独立测量值的期望非常吻合。对于这五个阵雨中的四个，测得的质量指数明显比NASA Meteoroid环境办公室（MEO）的年度流星淋浴预测的较浅。在限制质量$ \ sim 1 \ thinspace \ mathrm {g} $的限制质量的预测和测量通量之间的直接比较对三个阵雨的观察结果表示良好一致性。
We present an algorithm developed to measure the fluxes of major meteor showers as observed in NASA's All-Sky Fireball Network cameras. Measurements of fluxes from the All-Sky cameras not only improve the Meteoroid Environment Office's (MEO's) ability to provide accurate risk assessments from major showers, but also allows the mass distribution of meteoroids within the shower to be constrained. This algorithm accounts for the shower-specific and event-specific exposure time and collecting area of the sky for nights where sufficiently large samples of shower meteors ($\sim 30$ or more from the shower) are observed. The fluxes derived from the All-Sky Fireball Network for the 2015 Geminid, 2016 Perseid and Quadrantid, 2017 Orionid, and 2018 Leonid shower peaks are calculated. All five of these shower fluxes show excellent agreement with expectations from independent measurements at different mass and luminosity limits. For four of these five showers, the measured mass indices are significantly shallower than what is currently assumed by the NASA Meteoroid Environment Office's (MEO's) annual meteor shower forecast. A direct comparison between forecasted and measured fluxes at limiting masses of $\sim 1 \thinspace \mathrm{g}$ shows good agreement for the three showers for which the observations took place near their peak activity.
