论文标题
跟踪太阳风流，从宽阔的图像仪迅速变化的观点，用于派克太阳能探测器
Tracking solar wind flows from rapidly varying viewpoints by the Wide-field Imager for Parker Solar Probe
论文作者
论文摘要
目的：我们的目标是开发方法，以从迅速变化的观点从冠状动脉或地球层成像器观察到的瞬态太阳风流。 方法：我们在PSP的第四次相遇期间构建了Parker Solar Probe（PSP）宽场成像仪（WISPR）观察的强度与时间和伸长（J-MAP）的地图。从J-MAP中，我们对thomson-purface-surface Map（R-MAP）的Impact-Radius构建了强度。最后，我们构建了一个纬度强度与时间图（LAT-MAP）。我们的方法令人满意地解决了与从迅速变化的观点观察结果获取的数据构建此类地图相关的挑战。 结果：我们的WISPR J-MAP表现出多个轨道，对应于瞬时太阳风流，范围从冠状质量弹出（CME）到流媒体斑点。后者的发生率约为每天4-5个，这与由$ \ sim1 $ au的J-MAP中的发生率相似，该数据用Heliospheric Imager-1（HI-1）在船上获得的太阳能陆地关系天线天线（hi-1）获得了飞机上的太阳能飞机（Stereo-a）。在研究期间，立体声A径向与PSP排列。 The WISPR J-map tracks correspond to angular speeds of $2.28 \pm 0.7$$^{\circ}$/hour ($2.49 \pm 0.95$$^{\circ}$/hour), for linear (quadratic) time-elongation fittings, and radial speeds of about 150-300 km s$^{-1}$.对LAT-MAP的分析表明，分叉的流媒体，这意味着PSP在近日期间正在通过略折的彩带飞行。 结论：我们开发了一个框架，以系统地捕获和表征来自具有迅速变化点的空间平台的瞬态太阳风流。该方法可以应用于PSP WISPR观察结果，以及从太阳能轨道任务中的工具中进行的观察结果。
Aims: Our goal is to develop methodologies to seamlessly track transient solar wind flows viewed by coronagraphs or heliospheric imagers from rapidly varying viewpoints. Methods: We constructed maps of intensity versus time and elongation (J-maps) from Parker Solar Probe (PSP) Wide-field Imager (WISPR) observations during the fourth encounter of PSP. From the J-map, we built an intensity on impact-radius-on-Thomson-surface map (R-map). Finally, we constructed a latitudinal intensity versus time map (Lat-map). Our methodology satisfactorily addresses the challenges associated with the construction of such maps from data taken from rapidly varying viewpoint observations. Results: Our WISPR J-map exhibits several tracks, corresponding to transient solar wind flows ranging from a coronal mass ejection (CME) down to streamer blobs. The latter occurrence rate is about 4-5 per day, which is similar to the occurrence rate in a J-map made from $\sim1$ AU data obtained with the Heliospheric Imager-1 (HI-1) on board the Solar Terrestrial Relations Observatory Ahead spacecraft (STEREO-A). STEREO-A was radially aligned with PSP during the study period. The WISPR J-map tracks correspond to angular speeds of $2.28 \pm 0.7$$^{\circ}$/hour ($2.49 \pm 0.95$$^{\circ}$/hour), for linear (quadratic) time-elongation fittings, and radial speeds of about 150-300 km s$^{-1}$. The analysis of the Lat-map reveals a bifurcating streamer, which implies that PSP was flying through a slightly folded streamer during perihelion. Conclusions: We developed a framework to systematically capture and characterize transient solar wind flows from space platforms with rapidly varying vantage points. The methodology can be applied to PSP WISPR observations as well as to upcoming observations from instruments on board the Solar Orbiter mission.
