A NARROW STREAMER-PUFF CORONAL MASS EJECTION FROM THE NONRADIAL ERUPTION OF AN ACTIVE-REGION FILAMENT
A NARROW STREAMER-PUFF CORONAL MASS EJECTION FROM THE NONRADIAL ERUPTION OF AN ACTIVE-REGION FILAMENT
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DOI：
10.1088/0004-637x/693/2/1851
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发表时间：
2009-03
期刊：
影响因子：
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通讯作者：
Yunchun Jiang;Jiayan Yang;R. Zheng;Y. Bi;Xiaoling Yang
中科院分区：
文献类型：
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作者：
Yunchun Jiang;Jiayan Yang;R. Zheng;Y. Bi;Xiaoling Yang
Bemporad等人最近发现了一种新的日冕物质抛射（CME），称为流光-喷流日冕物质抛射（CME）。它们起源于发生在拖缆底部外围的致密抛射耀斑的非径向抛射物，并沿拖缆沿着向外传播，在此期间，拖缆被喷流短暂膨胀，但不被破坏。摩尔和斯特林进一步指出，飘流喷流日冕物质抛射是一个特殊的子类的一大类日冕物质抛射，所谓的“过-出”日冕物质抛射，来自耀斑产生的磁爆炸的各种大小和横向远离耀斑。在本文中，我们提出了一个流光喷CME的观测结果，导致壮观的喷发活动区灯丝内的一个单一的头盔流光组成的双拱廊系统，发生在AR 10792年7月29日。暗条被一个较小的拱廊覆盖在流光底部的外侧，附近有一个静止的日珥，位于另一个较大的拱廊之下。在内日冕的灯丝喷发经历非径向运动，而在外日冕的日冕物质抛射有一个径向路径沿着的流光，是横向偏离的原网站的灯丝。CME的角宽仅为15°，在1.38 R以下清晰地显示出典型的三部分结构。在这次爆发中，日珥几乎保持不变，但在随后的几天里，在同一AR的其他更强的同源序列爆发中，它表现出明显的振荡。这些观测结果可以解释的磁拱井喷的情况下，流光吞吐和过度和出CME，其中流光拱廊可以对喷发的灯丝，横向偏转和引导其运动。日珥的振荡可能表明双弧之间的相互作用或相互作用，这可能会影响但不会破坏支持日珥的整体场结构。
So-called streamer-puff coronal mass ejections (CMEs) were recently identified by Bemporad et al. as a new variety of CME. They originate from nonradial ejecta from compact ejective flares occurring in the outskirts of the base of a streamer and travel out along it, during which the streamer is transiently inflated by the puff but is not disrupted. Moore & Sterling further indicated that streamer-puff CMEs are a particular subclass of a broad class of CMEs, called “over-and-out” CMEs, which come from flare-producing magnetic explosions of various sizes and are laterally far offset from the flare. In this paper, we present observations of a streamer-puff CME that resulted from the spectacular eruption of an active-region filament inside a single helmet streamer consisting of a double-arcade system, occurring in AR 10792 on 2005 July 29. The filament was covered by a smaller arcade in the outer flank of the streamer base, with a nearby quiescent prominence below another larger arcade. In the inner corona the filament eruption underwent nonradial motion, while in the outer corona the CME had a radial path along the streamer that was laterally offset from the original site of the filament. The CME was narrow with an angular width of only 15° and clearly showed a typical three-part structure below 1.38 R☉. In this eruption, the prominence remained nearly unchanged, but in other stronger eruptions of a homologous sequence from the same AR in the following days, it exhibited obvious oscillations. These observations can be explained by the magnetic-arch-blowout scenario for streamer-puff and over-and-out CMEs, in which the streamer arcade can act on the erupting filament, laterally deflecting and channeling its motion. The prominence oscillations probably indicate an interplay or interaction between the twin arcades that could affect but not destroy the overall field configuration supporting the prominence.