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arXiv 1107.1391astro-ph.SR
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用SDO和STEREO观测三维重建一个爆发丝状体

Three-Dimensional Reconstruction of an Erupting Filament with SDO and STEREO Observations

Ting Li, Jun Zhang, Yuzong Zhang, Shuhong Yang

摘要:

2010年8月1日,一个全球性的太阳事件发生,几乎涉及整个太阳面向地球的一面。该事件主要包括一次C3.2耀斑、一次极冠暗条爆发和两次地球定向日冕物质抛射(CME)。太阳动力学天文台(SDO)和日地关系天文台(STEREO)的观测结果表明,所有的活动都耦合在一起,这表明磁喷发具有全球性。我们重建的三维几何形状的极冠细丝从三个不同的观点(立体声A,B和SDO)的第一次使用的意见。花丝经历了两次喷发过程。首先,暗条的主体上升,同时也向低纬地区移动,倾角变化48度,在大气成像组合的视场中仅在高度和纬度方向上扩展。我们研究了沿暗条不同位置的真实速度和加速度,发现在这次喷发过程中,最高的位置总是具有最大的加速度。在第一次喷发的后期,部分丝状物质从东侧分离。该物质显示出抛体运动,并以141.8 km/s的恒定速度向西移动。这可能意味着极冠丝至少由两组磁系组成。

英文摘要:

On 2010 August 1, a global solar event was launched involving almost the entire Earth-facing side of the Sun. This event mainly consisted of a C3.2 flare, a polar crown filament eruption and two Earth-directed coronal mass ejections (CMEs). The observations from the Solar Dynamics Observatory (SDO) and the Solar Terrestrial Relations Observatory (STEREO) showed that all the activities were coupled together, suggesting a global character of the magnetic eruption. We reconstruct the three-dimensional geometry of the polar crown filament using observations from three different viewpoints (STEREO A, B and SDO) for the first time. The filament undergoes two eruption processes. Firstly, the main body of the filament rises up, while it also moves towards the low-latitude region with a change in inclination by 48 degree and expands only in the altitudinal and latitudinal direction in the field of view of Atmospheric Imaging Assembly. We investigate the true velocities and accelerations of different locations along the filament, and find that the highest location always has the largest acceleration during this eruption process. During the late phase of the first eruption, part of the filament material separates from the eastern leg. This material displays a projectile motion and moves towards the west at a constant velocity of 141.8 km/s. This may imply that the polar crown filament consists of at least two groups of magnetic systems.

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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