PADRE/MeDDEA的首次结果：耀斑及其日冕物质抛射的X射线
First results from PADRE/MeDDEA: X-rays from a flare and its CME
- University of Applied Sciences and Arts Northwestern Switzerland（西北瑞士应用科学与艺术大学）
- ETH Zürich（苏黎世联邦理工学院）
- Université Paris-Saclay（巴黎萨克雷大学）
- Université Paris Cité（巴黎西岱大学）
- NASA Goddard Space Flight Center（美国国家航空航天局戈达德太空飞行中心）
- American University（美利坚大学）
- Southwest Research Institute（西南研究所）
- Space Sciences Laboratory, University of California（加州大学空间科学实验室）
机构由 AI 辅助整理，请以论文原文为准。
AI总结：
本文利用PADRE/MeDDEA与STIX的首次联合观测，评估了MeDDEA校准精度，证实其光谱数据与Fermi/GBM和ASO-S/HXI在18-30 keV内一致，并揭示了与CME相关的微弱硬X射线发射及其热能量特征。
AI中文摘要：
搭载于NASA PADRE立方星上的MeDDEA硬X射线光谱仪运行着来自Solar Orbiter/STIX仪器的四台飞行备用探测器。本文旨在评估MeDDEA校准的准确性，并证明MeDDEA数据已可用于科学研究。利用MeDDEA与STIX的首次联合观测，我们研究了与逃逸的日冕物质抛射（CME）相关的微弱硬X射线（HXR）发射，并将其与整个耀斑的发射进行比较。分析了MeDDEA观测到的首个大耀斑，并将MeDDEA光谱与Fermi/GBM和ASO-S/HXI的同时观测进行了比较。从Solar Orbiter的视角来看，该耀斑高度临边掩蔽，使得STIX能够隔离与CME相关的高日冕发射，而MeDDEA则观测到了整个耀斑。我们将光谱拟合与STIX、HXI和AIA的HXR/EUV成像相结合，以研究耀斑和CME相关HXR源的位置和能量学。MeDDEA的光谱观测与Fermi/GBM和ASO-S/HXI在18-30 keV能量范围内的一致性在10%以内。STIX在非热范围内观测到的与CME相关的光子通量很微弱，约为耀斑光子通量的1%。另一方面，与CME相关的热分量的能量含量被发现与耀斑环的热能处于同一数量级，至少在填充因子为1的情况下是如此。STIX与AIA结合成的成像信息揭示，STIX测量的发射位于相关的CME内部。我们报告称，MeDDEA提供了科学上可靠的光谱观测，并已准备好用于科学研究。
英文摘要：
The MeDDEA hard X-ray spectrometer onboard NASAs PADRE CubeSat operates four flight-spare detectors from the Solar Orbiter/STIX instrument. This paper aims to evaluate the accuracy of the MeDDEA calibration and to demonstrate that MeDDEA data are ready for scientific exploitation. Using the first joint observations between MeDDEA and STIX, we investigate faint HXR emission associated with an escaping CME relative to the emission from the full flare. The first large flare observed by MeDDEA is analyzed, and the MeDDEA spectrum is compared with simultaneous observations from Fermi/GBM and ASO-S/HXI. From the Solar Orbiter viewpoint, the flare is highly limb-occulted allowing STIX to isolate high coronal emission associated with the CME while MeDDEA observed the full flare. We combined spectral fitting with HXR/EUV imaging from STIX, HXI, and AIA to investigate the locations and energetics of the flare- and CME-associated HXR sources. The MeDDEA spectral observations are in agreement with FERMI/GBM and ASO-S/HXI within 10 percent in the energy range of 18-30 keV. The CME-associated photon flux observed by STIX in the nonthermal range is faint at about 1 percent of the flare photon flux. The energy content of the thermal component associated with the CME, on the other hand, is found to be of the same order of magnitude as the thermal energy of the flare loop, at least for a filling factor of unity. Imaging information from STIX in combination with AIA reveals that the emission measured by STIX is located within the associated CME. We report that MeDDEA provides scientifically reliable spectral observations and is ready for scientific use.
