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arXiv 1003.4758astro-ph.SR
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2008年4月9日“车轮CME“耀斑中Hinode/XRT观测到的重联流出和电流片

Reconnection Outflows and Current Sheet Observed with Hinode/XRT in the 2008 April 9 "Cartwheel CME" Flare

Sabrina L. Savage, David E. McKenzie, Katharine K. Reeves, Terry G. Forbes, Dana W. Longcope

摘要:

已经用Yohkoh/SXT(软X射线(SXR))、TRACE(极紫外线(EUV))、SoHO/LASCO(白光)、SoHO/SUMER(EUV光谱)和Hinode/XRT(SXR)观察到了超拱廊下行流(SAD)。低发射率和轨迹,如他们到达拱廊的顶部缓慢的特点是一致的后重联磁通量管从一个重联网站收回高的日冕,直到他们达到一个较低的能量磁配置。从垂直的角度看,SAD应该表现为收缩的环,而不是向下流动的空洞。我们目前的XRT观测超拱道下降环(SADLs)后,日冕物质抛射(CME)在2008年4月9日,并表明,它们的速度和减速是一致的SAD确定的。我们还提出了一个可能的电流片在此耀斑期间观察到的耀斑拱廊和CME之间延伸的证据。此外,我们显示了与XRT观察到的重连接流出和与LASCO观察到的流出之间的关联。

英文摘要:

Supra-arcade downflows (SADs) have been observed with Yohkoh/SXT (soft X-rays (SXR)), TRACE (extreme ultra-violet (EUV)), SoHO/LASCO (white light), SoHO/SUMER (EUV spectra), and Hinode/XRT (SXR). Characteristics such as low emissivity and trajectories which slow as they reach the top of the arcade are consistent with post-reconnection magnetic flux tubes retracting from a reconnection site high in the corona until they reach a lower-energy magnetic configuration. Viewed from a perpendicular angle, SADs should appear as shrinking loops rather than downflowing voids. We present XRT observations of supra-arcade downflowing loops (SADLs) following a coronal mass ejection (CME) on 2008 April 9 and show that their speeds and decelerations are consistent with those determined for SADs. We also present evidence for a possible current sheet observed during this flare that extends between the flare arcade and the CME. Additionally, we show a correlation between reconnection outflows observed with XRT and outgoing flows observed with LASCO.

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