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Studies of Isolated and Non-isolated Photospheric Bright Points in an Active Region Observed by the New Vacuum Solar Telescope
Liu YX(刘艳宵)1,2,3; Xiang YY(向永源)1,3; Erdelyi, Robertus4,5; Liu Z(刘忠)1,3; Li, Dong6,7; Ning, Zongjun6,7; Bi Y(毕以)1,2,3; Wu, Ning8; Lin J(林隽)1,3
Source PublicationASTROPHYSICAL JOURNAL
2018-03-20
Volume856Issue:1
DOI10.3847/1538-4357/aab150
Contribution Rank第1完成单位
Indexed BySCI
KeywordInstrumentation: High Angular Resolution Methods: Observational Sun: Photosphere
Abstract

Properties of photospheric bright points (BPs) near an active region have been studied in TiO lambda 7058 angstrom images observed by the New Vacuum Solar Telescope of the Yunnan Observatories. We developed a novel recognition method that was used to identify and track 2010 BPs. The observed evolving BPs are classified into isolated (individual) and non-isolated (where multiple BPs are observed to display splitting and merging behaviors) sets. About 35.1% of BPs are non-isolated. For both isolated and non-isolated BPs, the brightness varies from 0.8 to. 1.3 times the average background intensity and follows a Gaussian distribution. The lifetimes of BPs follow a lognormal distribution, with characteristic lifetimes of (267 +/- 140). s and (421 +/- 255). s, respectively. Their size also follows log-normal distribution, with an average size of about (2.15 +/- 0.74). x. 10(4) km(2) and (3.00 +/- 1.31). x 10(4) km(2) for area, and (163 +/- 27) km and (191 +/- 40) km for diameter, respectively. Our results indicate that regions with strong background magnetic field have higher BP number density and higher BP area coverage than regions with weak background field. Apparently, the brightness/size of BPs does not depend on the background field. Lifetimes in regions with strong background magnetic field are shorter than those in regions with weak background field, on average.

Funding ProjectProgram 973[2013CBA01503] ; NSFC[U1631130] ; NSFC[11333007] ; NSFC[11763004] ; NSFC[11763004] ; CAS[QYZDJ-SSW-SLH012] ; CAS[XDA15010900] ; Group for Innovation of Yunnan Province ; STFC (UK) ; Royal Society ; Chinese Academy of Sciences President's International Fellowship Initiative([2016VMA045]
Funding OrganizationProgram 973[2013CBA01503] ; NSFC[U1631130, 11333007, 11763004, 11633008] ; CAS[QYZDJ-SSW-SLH012, XDA15010900] ; Group for Innovation of Yunnan Province ; STFC (UK) ; Royal Society ; Chinese Academy of Sciences President's International Fellowship Initiative([2016VMA045]
Language英语
Subject Area天文学 ; 太阳与太阳系 ; 太阳物理学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherIOP PUBLISHING LTD
Publication PlaceTEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
ISSN0004-637X
URL查看原文
WOS IDWOS:000428455800003
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordG-BAND BRIGHT ; MAGNETIC-FLUX TUBES ; QUIET SUN ; HIGH-RESOLUTION ; CONVECTIVE INSTABILITY ; RADIATIVE PROPERTIES ; PATTERN-RECOGNITION ; SPECKLE-MASKING ; FACULAE ; SIZE
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/12300
Collection太阳物理研究组
Corresponding AuthorLin J(林隽)
Affiliation1.Yunnan Observatories, Chinese Academy of Sciences, P.O. Box 110, Kunming, Yunnan 650216, People's Republic of China
2.University of Chinese Academy of Sciences, Beijing 100039, People's Republic of China
3.Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, People's Republic of China
4.Solar Physics and Space Plasma Research Centre (SP2RC), School of Mathematics and Statistics, The University of Sheffield, Hicks Building, Hounsfield Road, Sheffield S3 7RH, UK
5.Department of Astronomy, Eötvös University, Pázmány P. sétány 1/A Budapest P.O. Box 32, H-1117, Hungary
6.Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing, Jiangsu 210008, People's Republic of China
7.Key Laboratory of Dark Matter and Space Science, Chinese Academy of Science, Nanjing, Jiangsu 210008, People's Republic of China
8.School of Tourism and Geography, Yunnan Normal University, Kunming, Yunnan 650500, People's Republic of China
First Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Corresponding Author AffilicationYunnan Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Liu YX,Xiang YY,Erdelyi, Robertus,et al. Studies of Isolated and Non-isolated Photospheric Bright Points in an Active Region Observed by the New Vacuum Solar Telescope[J]. ASTROPHYSICAL JOURNAL,2018,856(1).
APA Liu YX.,Xiang YY.,Erdelyi, Robertus.,Liu Z.,Li, Dong.,...&Lin J.(2018).Studies of Isolated and Non-isolated Photospheric Bright Points in an Active Region Observed by the New Vacuum Solar Telescope.ASTROPHYSICAL JOURNAL,856(1).
MLA Liu YX,et al."Studies of Isolated and Non-isolated Photospheric Bright Points in an Active Region Observed by the New Vacuum Solar Telescope".ASTROPHYSICAL JOURNAL 856.1(2018).
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