Proba-3与Aditya-L1协同日冕观测：研究内日冕日冕物质抛射的能量学

中文摘要 AI 辅助

约束内日冕中日冕物质抛射（CME）的等离子体性质和能量学对于理解其早期演化至关重要，但由于观测有限，这仍然具有挑战性。我们研究了2025年9月14日和16日观测到的两次CME的质量、密度演化和能量分配，并评估了Proba-3/ASPIICS与Aditya-L1/VELC协同观测在约束低日冕CME能量学方面的潜力。我们首次展示了由Proba-3/ASPIICS和Aditya-L1/VELC同时获得的CME协同观测结果。利用ASPIICS白光观测，我们估算了CME的质量、体积、数密度以及动能、热能和磁能的演化。磁能是利用观测约束且物理上合理的假设，根据观测到的CME性质估算的。同时进行的VELC Fe XIV 5303埃观测提供了发射度量、电子数密度、热能和CME横向范围的独立估算。这两个事件在低日冕中表现出显著不同的能量分配。对于9月14日的CME，动能和磁能相当，而热能几乎小两个数量级，表明等离子体加热有限。相比之下，9月16日的CME表现出显著的热能增强，热能最终变得与动能相当。对于两次CME，在观测高度范围内，估算的磁能始终与动能相当或超过动能。我们的结果证明了ASPIICS和VELC协同观测在约束内日冕CME质量、密度和能量学方面的科学潜力，为CME的早期演化提供了新的观测约束。

英文摘要

Constraining the plasma properties and energetics of coronal mass ejections (CMEs) in the inner corona is essential for understanding their early evolution, yet remains challenging because of limited observations. We investigate the mass and density evolution, and energy partitioning of two CMEs observed on 2025 September 14 and 16, and assess the potential of coordinated Proba-3/ASPIICS and Aditya-L1/VELC observations to constrain CME energetics in the low corona. We present the first coordinated observations of CMEs obtained simultaneously by Proba-3/ASPIICS and Aditya-L1/VELC. Using ASPIICS white-light observations, we estimate the CME mass, volume, number density, and the evolution of kinetic, thermal, and magnetic energies. Magnetic energies are estimated from observed CME properties using observationally constrained, physically motivated assumptions. Simultaneous VELC Fe XIV 5303 Angstorm observations provide independent estimates of the emission measure, electron number density, thermal energy, and CME lateral extent. The two events exhibit markedly different energy partitioning in the low corona. For the 14 September CME, the kinetic and magnetic energies are comparable, while the thermal energy remains nearly two orders of magnitude smaller, indicating limited plasma heating. In contrast, the 16 September CME exhibits a substantial thermal-energy enhancement, with thermal energy eventually becoming comparable to kinetic energy. For both CMEs, the estimated magnetic energy remains comparable to or exceeds the kinetic energy over the observed height. Our results demonstrate the scientific potential of synergetic ASPIICS and VELC observations for constraining CME mass, density, and energetics in the inner corona, providing new observational constraints on the early evolution of CMEs.

发表机构

• Indian Institute of Astrophysics（印度天体物理研究所）
• Pondicherry University（本地治里大学）
• Royal Observatory of Belgium（比利时皇家天文台）
• NASA Goddard Space Flight Center（美国国家航空航天局戈达德太空飞行中心）
• Université de Liège（列日大学）
• National Institute for Astrophysics（国家天体物理研究所）
• Astronomical Institute of the Czech Academy of Sciences（捷克科学院天文研究所）
• Laboratoire Atmosphères et Observations Spatiales（大气与空间观测实验室）
• Institute of Geodynamics of the Romanian Academy（罗马尼亚科学院地球动力学研究所）
• Max Planck Institute for Solar System Research（马克斯·普朗克太阳系研究所）
• University of Wrocław（弗罗茨瓦夫大学）
• University of Athens（雅典大学）

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16 pages, 9 figures, 2 tables; Accepted for publication in A&A