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Intermittency spectra of current helicity in solar active regions

文献类型：期刊论文

作者Kutsenko, A. S.2; Abramenko, V. I.2; Kuzanyan, K. M.3; Xu, Haiqing1; Zhang, Hongqi1
刊名MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
出版日期2018-11-01
卷号480期号:3页码:3780-3787
ISSN号0035-8711
关键词Sun: magnetic fields Sun: photosphere
DOI10.1093/mnras/sty2109
英文摘要We analyse the spatial distribution of current helicity in solar active regions. A comparison of current helicity maps derived from three different instruments (Helioseismic and Magnetic Imager on board the Solar Dynamics Observatory, SDO/I IMI, Spectro-Polarimeter on board the Hinode, and Solar Magnetic Field Telescope at the Huairou Solar Observing Station, China, IISOS/SMFT) is carried out. The comparison showed an excellent correlation between the maps derived from the space-borne instruments and moderate correlation between the maps derived from SDO/HMI and HSOS/SMFT vector magnetograms. The results suggest that the obtained maps characterize real spatial distribution of current helicity over an active region. To analyse intermittency of current helicity, we traditionally use the high-order structure functions and flatness function approach. The slope of a flatness function within some range of scales - the flatness exponent - is a measure of the degree of intermittency. SDO/HMI vector magnetograms for three active regions (NOAA 11158,12494, and 12673) were used to calculate the flatness exponent time variations. All three active regions exhibited emergence of a new magnetic flux during the observational interval. The flatness exponent indicated the increase of intermittency 12-20 hours before the emergence of a new flux. We suppose that this behaviour can indicate subphotospheric fragmentation or distortion of the pre-existed electric current system by emerging magnetic flux.
WOS关键词ELECTRIC-CURRENT HELICITY ; MAGNETIC-FIELD ; VECTOR MAGNETOGRAMS ; CYCLE VARIATION ; IMAGER ; CALIBRATION ; ATMOSPHERE ; EMERGENCE ; PATTERNS ; RULE
资助项目Russian Fund for Basic Research (RFBR)[17-52-53203] ; Russian Fund for Basic Research (RFBR)[17-02-00049] ; National Natural Science Foundation of China[11673033] ; National Natural Science Foundation of China[11703042] ; National Natural Science Foundation of China[11427901] ; National Natural Science Foundation of China[U1731241] ; NSFC-RFBR[11611530679] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA15052200]
WOS研究方向Astronomy & Astrophysics
语种英语
出版者OXFORD UNIV PRESS
WOS记录号WOS:000449616200072
资助机构Russian Fund for Basic Research (RFBR) ; Russian Fund for Basic Research (RFBR) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSFC-RFBR ; NSFC-RFBR ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Russian Fund for Basic Research (RFBR) ; Russian Fund for Basic Research (RFBR) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSFC-RFBR ; NSFC-RFBR ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Russian Fund for Basic Research (RFBR) ; Russian Fund for Basic Research (RFBR) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSFC-RFBR ; NSFC-RFBR ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Russian Fund for Basic Research (RFBR) ; Russian Fund for Basic Research (RFBR) ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; NSFC-RFBR ; NSFC-RFBR ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Strategic Priority Research Program of the Chinese Academy of Sciences
源URL[http://ir.bao.ac.cn/handle/114a11/23366]  
专题中国科学院国家天文台
通讯作者Kutsenko, A. S.; Abramenko, V. I.
作者单位1.Chinese Acad Sci, Natl Astron Observ, Beijing 100012, Peoples R China
2.Crimean Astrophys Observ, UA-298409 Nauchnyi, Crimea, Ukraine
3.IZMIRAN, Moscow 108840, Russia
推荐引用方式
GB/T 7714		 Kutsenko, A. S.,Abramenko, V. I.,Kuzanyan, K. M.,et al. Intermittency spectra of current helicity in solar active regions[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,480(3):3780-3787.
APA Kutsenko, A. S.,Abramenko, V. I.,Kuzanyan, K. M.,Xu, Haiqing,&Zhang, Hongqi.(2018).Intermittency spectra of current helicity in solar active regions.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,480(3),3780-3787.
MLA Kutsenko, A. S.,et al."Intermittency spectra of current helicity in solar active regions".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 480.3(2018):3780-3787.

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