论文标题
使用WISPR/Parker太阳能探测器的图像提取冠状射线的射击坐标
Extracting the Heliographic Coordinates of Coronal Rays using Images from WISPR/Parker Solar Probe
论文作者
论文摘要
在白光下观察的太阳能探针（WISPR）的宽场成像仪具有固定的角度视野，从太阳延伸到108度，在横向方向上延伸了约50度。 2021年1月，在其第七个轨道上，PSP以20太阳半径的距离越过周围的地球层电流板（HCS）。此时，WISPR观察到了一条高度可变的太阳风和多个冠状射线。在近日期前六天，PSP以超过太阳的角速度移动。在此期间，WISPR能够在PSP接近时对冠状射线进行成像，然后通过或越过它们。我们已经开发了一种技术，用于使用冠状射线的多种观点来确定其在地中心坐标系中的位置（经度和纬度），并使用该技术来确定三个冠状射线的坐标。通过将结果与对太阳能和热物理天文台（SOHO）/大角度和光谱冠状动脉（LASCO）/C3以及太阳陆地关系天文台（Stereo）（立体）（立体）的观测结果进行比较，通过将结果进行比较来验证该技术。射线位置的比较还与3D MHD模型预测的HC进行了比较。将来，该技术的结果可用于验证电晕的动态模型。
The Wide-field Imager for Solar Probe (WISPR) onboard Parker Solar Probe (PSP), observing in white light, has a fixed angular field of view, extending from 13.5 degree to 108 degree from the Sun and approximately 50 degree in the transverse direction. In January 2021, on its seventh orbit, PSP crossed the heliospheric current sheet (HCS) near perihelion at a distance of 20 solar radii. At this time, WISPR observed a broad band of highly variable solar wind and multiple coronal rays. For six days around perihelion, PSP was moving with an angular velocity exceeding that of the Sun. During this period, WISPR was able to image coronal rays as PSP approached and then passed under or over them. We have developed a technique for using the multiple viewpoints of the coronal rays to determine their location (longitude and latitude) in a heliocentric coordinate system and used the technique to determine the coordinates of three coronal rays. The technique was validated by comparing the results to observations of the coronal rays from Solar and Heliophysics Observatory (SOHO) / Large Angle and Spectrometric COronagraph (LASCO)/C3 and Solar Terrestrial Relations Observatory (STEREO)-A/COR2. Comparison of the rays' locations were also made with the HCS predicted by a 3D MHD model. In the future, results from this technique can be used to validate dynamic models of the corona.
