Dynamics of Plasma and Magnetic Fields in a Quiescent Prominence Formation

IF 2.4 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS

Solar Physics Pub Date : 2025-06-19 DOI:10.1007/s11207-025-02493-1

P. T. Jain Jacob, Ram Ajor Maurya, Durgesh Tripathi

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Abstract

We study the evolution and reorganization of magnetic field lines and associated plasma dynamics during the formation of a quiescent prominence. For this purpose, we have utilized the observations taken by the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO). Our observations revealed an abrupt ascent of an EUV bright structure (or EUV jet) accompanied by a downflow during the early stage of the prominence formation. We closely tracked the rising motion and the associated downflow, estimating their average speeds around 2.8 km s⁻¹ and 10.1 km s⁻¹, respectively, in conjunction with the brightening of a rising jet. We derived the temperature of the jet plasma by employing the Differential Emission Measure (DEM) on AIA observations and found it to be higher than expected temperature of prominence plasma (around \(\log _{10}T \approx 5.2\)). Moreover, we observed bi-directional plasma motions and brightening in jet plasma at the same time. These observations could be due to the reorganization of the magnetic field lines as part of magnetic reconnection within the prominence during early phase of its formation.

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静止日珥形成过程中等离子体和磁场的动力学

我们研究了静日珥形成过程中磁力线的演化和重组以及相关的等离子体动力学。为此，我们利用了太阳动力学观测台（SDO）上的大气成像组件（AIA）所进行的观测。我们的观测显示，在日珥形成的早期阶段，一个极紫外明亮结构（或极紫外射流）的突然上升伴随着一个下降流。我们密切跟踪了上升运动和相关的下降流，估计它们的平均速度分别在2.8 km s - 1和10.1 km s - 1左右，并结合上升射流的变亮。我们利用AIA观测的差分发射测量（DEM）得到了喷射等离子体的温度，发现它比日珥等离子体的预期温度要高（在\(\log _{10}T \approx 5.2\)附近）。此外，我们还同时观察到等离子体的双向运动和增亮。这些观测结果可能是由于磁力线的重组，作为日珥形成早期磁重联的一部分。

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来源期刊

Solar Physics 地学天文-天文与天体物理

CiteScore

5.10

自引率

17.90%

发文量

146

审稿时长

1 months

期刊介绍： Solar Physics was founded in 1967 and is the principal journal for the publication of the results of fundamental research on the Sun. The journal treats all aspects of solar physics, ranging from the internal structure of the Sun and its evolution to the outer corona and solar wind in interplanetary space. Papers on solar-terrestrial physics and on stellar research are also published when their results have a direct bearing on our understanding of the Sun.