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arXiv 2210.09129astro-ph.SRphysics.space-ph
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SO/EUI观测到的EUV增亮与非电势模拟增亮的统计比较

A Statistical Comparison of EUV Brightenings Observed by SO/EUI with Simulated Brightenings in Non-potential Simulations

Krzysztof Barczynski, Karen A. Meyer, Louise K. Harra, Duncan H. Mackay, Frederic Auchere, David Berghmans

摘要:

太阳轨道飞行器上的极紫外成像仪(EUI)仪器的高分辨率成像仪(HRI_EUV)望远镜观察到了极紫外增亮,即所谓的营火,作为日冕温度下的细尺度结构。本文的目的是比较的基本几何(大小,方向)和物理(强度,寿命)的EUV增亮与区域的能量耗散在一个非潜在的日冕磁场模拟的属性。在模拟中,HMI视线磁图被用作输入,以驱动日冕磁场和能量耗散的演变。我们对HRI_EUV望远镜于2020年5月30日获得的EUV图像应用了自动EUV增亮检测方法。我们将相同的检测方法应用于来自非势模拟的模拟能量耗散图,以检测模拟增亮。我们在EUI观测中检测到了密度为1.41x10^{-3}增亮/Mm^2的EUV增亮,在模拟中,对于相同的时间范围,模拟增亮在2.76x10^{-2} - 4.14x10^{-2}增亮/Mm^2之间。虽然在模拟中产生了明显更多的增亮,但结果显示观察到的增亮和模拟的增亮的关键几何和物理性质的分布相似。我们的结论是,非潜在的模拟可以成功地再现统计的EUV增亮的特征属性(通常具有超过85%的相似性),只有事件的持续时间是显着不同的观测和模拟。正在考虑根据太阳轨道器的高节奏和高分辨率磁图进行进一步研究,以提高观测和模拟之间的一致性。

英文摘要:

The High Resolution Imager (HRI_EUV) telescope of the Extreme Ultraviolet Imager (EUI) instrument onboard Solar Orbiter has observed EUV brightenings, so-called campfires, as fine-scale structures at coronal temperatures. The goal of this paper is to compare the basic geometrical (size, orientation) and physical (intensity, lifetime) properties of the EUV brightenings with regions of energy dissipation in a non-potential coronal magnetic field simulation. In the simulation, HMI line-of-sight magnetograms are used as input to drive the evolution of solar coronal magnetic fields and energy dissipation. We applied an automatic EUV brightening detection method to EUV images obtained on 30 May 2020 by the HRI_EUV telescope. We applied the same detection method to the simulated energy dissipation maps from the non-potential simulation to detect simulated brightenings. We detected EUV brightenings with density of 1.41x10^{-3} brightenings/Mm^2 in the EUI observations and simulated brightenings between 2.76x10^{-2} - 4.14x10^{-2} brightenings/Mm^2 in the simulation, for the same time range. Although significantly more brightenings were produced in the simulations, the results show similar distributions of the key geometrical and physical properties of the observed and simulated brightenings. We conclude that the non-potential simulation can successfully reproduce statistically the characteristic properties of the EUV brightenings (typically with more than 85% similarity); only the duration of the events is significantly different between observations and simulation. Further investigations based on high-cadence and high-resolution magnetograms from Solar Orbiter are under consideration to improve the agreement between observation and simulation.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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