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arXiv 1912.02808astro-ph.SR
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日冕喷流和喷流-日冕物质抛射的联系

Coronal Jets, and the Jet-CME Connection

Alphonse C. Sterling

摘要:

自20世纪90年代初以来,太阳日冕喷流一直被详细观测。虽然很明显,这些喷气机是磁力驱动的,但驱动过程的细节最近已经更新。此前人们怀疑这些喷流是磁通量出现与周围日冕场相互作用的结果。然而,新的证据表明,喷流的直接驱动力通常是喷发场,通常携带冷物质(“微丝”),与预先存在的场发生交换磁重联([1])。最近的研究指出,微暗条喷发的触发因素通常是微暗条底部光球磁场的抵消。这些爆发的微暗条类似于更著名的大规模暗条爆发,后者会产生太阳耀斑,并经常产生日冕物质抛射(CME)。日冕喷流的一个子集驱动狭窄的“白光喷流”,这是非常狭窄的CME特征,显然少数喷流可以驱动更宽,虽然相对较弱,“流光喷流”CME。在这里,我们总结了这些最新的发现。

英文摘要:

Solar coronal jets have been observed in detail since the early 1990s. While it is clear that these jets are magnetically driven, the details of the driving process has recently been updated. Previously it was suspected that the jets were a consequence of magnetic flux emergence interacting with ambient coronal field. New evidence however indicates that often the direct driver of the jets is erupting field, often carrying cool material (a "minifilament"), that undergoes interchange magnetic reconnection with preexisting field ([1]). More recent work indicates that the trigger for eruption of the minifilament is frequently cancelation of photospheric magnetic fields at the base of the minifilament. These erupting minifilaments are analogous to the better-known larger-scale filament eruptions that produce solar flares and, frequently, coronal mass ejections (CMEs). A subset of coronal jets drive narrow "white-light jets," which are very narrow CME-like features, and apparently a few jets can drive wider, although relatively weak, "streamer-puff" CMEs. Here we summarize these recent findings.

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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