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PMO OpenIR  > 太阳活动的多波段观测研究团组  > 期刊论文
题名: RESOLVING THE FAN-SPINE RECONNECTION GEOMETRY OF A SMALL-SCALE CHROMOSPHERIC JET EVENT WITH THE NEW SOLAR TELESCOPE
作者: Zeng, Zhicheng1, 2; Chen, Bin1, 3; Ji HaiSheng(季海生)2, 4; Goode, Philip R.1, 2; Cao, Wenda1, 2
刊名: ASTROPHYSICAL JOURNAL LETTERS
出版日期: 2016-03-01
卷号: 819, 期号:1
关键词: Sun: activity ; Sun: chromosphere ; Sun: corona
DOI: 10.3847/2041-8205/819/1/L3
文章类型: Article
英文摘要: Jets are ubiquitously present in both quiet and active regions on the Sun. They are widely believed to be driven by magnetic reconnection. A fan-spine structure has been frequently reported in some coronal jets and flares, and has been regarded as a signature of ongoing magnetic reconnection in a topology consisting of a magnetic null connected by a fan-like separatrix surface and a spine. However, for small-scale chromospheric jets, clear evidence of such structures is rather rare, although it has been implied in earlier works that showed an inverted-Y-shaped feature. Here we report high-resolution (0 16) observations of a small-scale chromospheric jet obtained by the New Solar Telescope (NST) using 10830 angstrom filtergrams. Bi-directional flows were observed across the separatrix regions in the 10830 angstrom images, suggesting that the jet was produced due to magnetic reconnection. At the base of the jet, a fan-spine structure was clearly resolved by the NST, including the spine and the fan-like surface, as well as the loops before and after the reconnection. A major part of this fan-spine structure, with the exception of its bright footpoints and part of the base arc, was invisible in the extreme ultraviolet and soft X-ray images (observed by the Atmosphere Imaging Assembly and the X-Ray Telescope, respectively), indicating that the reconnection occurred in the upper chromosphere. Our observations suggest that the evolution of this chromospheric jet is consistent with a two-step reconnection scenario proposed by Torok et al.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: X-RAY TELESCOPE ; DYNAMICS-OBSERVATORY SDO ; FLUX EMERGENCE ; EMERGING FLUX ; MAGNETIC-FLUX ; CORONAL HOLES ; ANEMONE JETS ; HINODE ; FIELD ; SIMULATIONS
收录类别: SCI
项目资助者: NJIT ; US NSF(AGS-1250818 ; NASA(NNX13AG14G) ; Korea Astronomy and Space Science Institute ; Seoul National University ; strategic priority research program of CAS(XDB09000000) ; AFOSR(FA 9550-15-1-0322) ; NASA from Lockheed-Martin(SP02H1701R ; AGS-0847126 ; NNM07AB07C) ; NSFC-11333009 ; NSFC-11428309)
语种: 英语
WOS记录号: WOS:000371044200003
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/16160
Appears in Collections:太阳活动的多波段观测研究团组_期刊论文

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作者单位: 1.New Jersey Inst Technol, Ctr Solar Terr Res, 323 Martin Luther King Blvd, Newark, NJ 07102 USA
2.Big Bear Solar Observ, 40386 North Shore Lane, Big Bear City, CA 92314 USA
3.Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA
4.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China
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