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Spectroscopic and imaging observations of small-scale reconnection events
Li, Dong1,2,3; Li, Leping2; Ning, Zongjun1
2018-09-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume479Issue:2Pages:2382-2388
Abstract

We present spectroscopic and imaging observations of small-scale reconnection events on the Sun. Using Interface Region Imaging Spectrograph (IRIS) observations, one reconnection event is first detected as IRIS jets with fast bidirectional velocities in the chromosphere and transition region, which are identified as non-Gaussian broadenings with two extended wings in the line profiles of SiIV, C II and MgIIk. The magnetograms under the IRIS jets from helioseismic and magnetic images simultaneously exhibit magnetic flux cancellation, supporting the idea that the IRIS jets are driven by magnetic reconnection. Atmospheric Imaging Assembly images also show an extreme ultraviolet (EUV) brightening shortly after the underlying IRIS jets, i.e. in the 131-, 171-, 193-, 211- and 94-angstrom channels, implying that the overlying EUV brightening in the corona is caused by the IRIS jets in the chromosphere and transition region. We also find another three reconnection events, which show the same features during this IRIS observation. Our observational results suggest that small-scale reconnection events might contribute to coronal heating. A new result is that the process of magnetic reconnection is detected from the photosphere through the chromosphere and transition region to the corona.

Keywordline: profiles magnetic reconnection Sun: corona Sun: transition region Sun: UV radiation
DOI10.1093/mnras/sty1712
WOS KeywordTRANSITION-REGION BLINKERS ; QUIET SOLAR CORONA ; EXPLOSIVE EVENTS ; MAGNETIC RECONNECTION ; BRIGHT POINTS ; CURRENT SHEET ; FLARE ; SUN ; DYNAMICS ; ENERGY
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000441380100066
PublisherOXFORD UNIV PRESS
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/21573
Collection中国科学院紫金山天文台
Corresponding AuthorLi, Dong
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Sci, Nanjing 210034, Jiangsu, Peoples R China
2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
3.Chinese Acad Sci, State Key Lab Space Weather, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Dong,Li, Leping,Ning, Zongjun. Spectroscopic and imaging observations of small-scale reconnection events[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,479(2):2382-2388.
APA Li, Dong,Li, Leping,&Ning, Zongjun.(2018).Spectroscopic and imaging observations of small-scale reconnection events.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,479(2),2382-2388.
MLA Li, Dong,et al."Spectroscopic and imaging observations of small-scale reconnection events".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 479.2(2018):2382-2388.
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