三维日冕 CME 重建的收集、整理和比较

IF 3.7 2区 地球科学
Space Weather Pub Date : 2024-01-23 DOI:10.1029/2023sw003796
C. Kay, E. Palmerio
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引用次数: 0

摘要

预测日冕物质抛射(CME)的影响是当前空间天气预报工作的重点。通常,日冕物质抛射的特性是从立体日冕图像中重建的,然后用于建立日冕物质抛射行星际演变的前向模型。了解日冕重建的不确定性是确定任何预测的不确定性的关键因素。目前有越来越多的日冕 CME 重建目录,但还没有对这些目录进行过广泛的比较。在此,我们开发了 "任何日冕重建中测量到的属性活列表"(LLAMACoRe),这是一个在线的单个目录集合,我们打算不断更新它。在第一版中,我们使用了来自 24 个不同目录的结果,并利用日地关系天文台 2007 年至 2014 年期间的观测数据进行了三维重建。我们对各个星表进行了整理,确定了哪些重建对应于相同的事件。LLAMACoRe 包含 1,862 个 CME 的 2,954 次重建。其中,511 个 CME 包含来自不同星表的多次重建。使用每个 CME 的最佳约束值,我们发现合并目录再现了众所周知的太阳周期趋势。我们确定了同一事件的两个独立重建值之间的典型差异,发现其纬度值为 4.0°,经度值为 8.0°,倾角值为 24.0°,角宽度值为 9.3°,形状参数 κ 为 0.1,速度值为 115 km/s,质量值为 2.5 × 1015 g。这些数值仍然是太阳周期中最有可能出现的数值,尽管我们在偏离太阳最大值的过程中发现了更极端的异常值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Collection, Collation, and Comparison of 3D Coronal CME Reconstructions
Predicting the impacts of coronal mass ejections (CMEs) is a major focus of current space weather forecasting efforts. Typically, CME properties are reconstructed from stereoscopic coronal images and then used to forward model a CME's interplanetary evolution. Knowing the uncertainty in the coronal reconstructions is then a critical factor in determining the uncertainty of any predictions. A growing number of catalogs of coronal CME reconstructions exist, but no extensive comparison between these catalogs has yet been performed. Here we develop a Living List of Attributes Measured in Any Coronal Reconstruction (LLAMACoRe), an online collection of individual catalogs, which we intend to continually update. In this first version, we use results from 24 different catalogs with 3D reconstructions using Solar Terrestrial Relations Observatory observations between 2007 and 2014. We have collated the individual catalogs, determining which reconstructions correspond to the same events. LLAMACoRe contains 2,954 reconstructions for 1,862 CMEs. Of these, 511 CMEs contain multiple reconstructions from different catalogs. Using the best-constrained values for each CME, we find that the combined catalog reproduces the generally known solar cycle trends. We determine the typical difference we would expect between two independent reconstructions of the same event and find values of 4.0° in the latitude, 8.0° in the longitude, 24.0° in the tilt, 9.3° in the angular width, 0.1 in the shape parameter κ, 115 km/s in the velocity, and 2.5 × 1015 g in the mass. These remain the most probable values over the solar cycle, though we find more extreme outliers in the deviation toward solar maximum.
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