论文标题
在67p/churyumov-gerasimenko的地面光度法中搜索爆发
Searching for Outbursts in the Ground-Based Photometry of 67P/Churyumov-Gerasimenko
论文作者
论文摘要
67p/churyumov-gerasimenko是木星家族彗星，是罗塞塔任务的目标，罗塞塔任务是第一个成功地绕和登上彗星的探测器的任务。该任务伴随着大型地面观察运动。我们已经开发了一条管道，以在其2016年围栏通道期间校准和测量彗星67p的光度法，利用在广泛的设施中收集的所有可见波长宽带成像。管道使用田间的背景星校准了彗星对公共光度系统（PAN-STARRS 1）的亮度，从而允许对多个数据集进行编译和比较。结果遵循基于先前的幻影的预测：67p在整个幻影中，从轨道到欧洲和昏迷的颜色从轨道到欧洲和昏迷的颜色没有明显变化。我们在2015年8月22日爆发了$ \ sim $ 0.14 mag。这次爆发的亮度和估计的质量使它与罗塞塔（Rosetta）在细胞核上直接观察到的爆发一致。与从地面上看到的那个事件同时观察到了原位爆发，但是直接将这两个事件联系起来仍然具有挑战性。
67P/Churyumov-Gerasimenko is a Jupiter-family comet that was the target of the Rosetta mission, the first mission to successfully orbit and land a probe on a comet. This mission was accompanied by a large ground-based observing campaign. We have developed a pipeline to calibrate and measure photometry of comet 67P during its 2016 perihelion passage, making use of all visible wavelength broadband imaging collected across a wide range of facilities. The pipeline calibrates the brightness of the comet to a common photometric system (Pan-STARRS 1) using background stars within the field allowing for compilation and comparison of multiple data sets. Results follow the predictions based on previous apparitions: 67P shows no obvious change in activity levels from orbit-to-orbit and coma colours remain constant throughout the apparition. We detected an outburst on 2015 August 22 of $\sim$0.14 mag. The brightness and estimated mass of this outburst puts it in line with the outbursts directly observed on the nucleus by Rosetta. An in situ outburst was observed at the same time as the one seen from the ground, however linking these two events directly remains challenging.
