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Period Increase and Amplitude Distribution of Kink Oscillation of Coronal Loop
Su, W.1,2,3,4,5; Guo, Y.4; Erdelyi, R.6,7; Ning, Z. J.3; Ding, M. D.4; Cheng, X.4; Tan, B. L.5
2018-03-14
Source PublicationSCIENTIFIC REPORTS
ISSN2045-2322
Volume8Pages:13
Corresponding AuthorSu, W.(suw12@hust.edu.cn) ; Ning, Z. J.(ningzongjun@pmo.ac.cn)
AbstractCoronal loops exist ubiquitously in the solar atmosphere. These loops puzzle astronomers over half a century. Solar magneto-seismology (SMS) provides a unique way to constrain the physical parameters of coronal loops. Here, we study the evolution of oscillations of a coronal loop observed by the Atmospheric Imaging Assembly (AIA). We measure geometric and physical parameters of the loop oscillations. In particular, we find that the mean period of the oscillations increased from 1048 to 1264s during three oscillatory cycles. We employ the differential emission measure method and apply the tools of SMS. The evolution of densities inside and outside the loop is analyzed. We found that an increase of density inside the loop and decrease of the magnetic field strength along the loop are the main reasons for the increase in the period during the oscillations. Besides, we also found that the amplitude profile of the loop is different from a profile would it be a homogeneous loop. It is proposed that the distribution of magnetic strength along the loop rather than density stratification is responsible for this deviation. The variation in period and distribution of amplitude provide, in terms of SMS, a new and unprecedented insight into coronal loop diagnostics.
DOI10.1038/s41598-018-22796-7
WOS KeywordTRANSVERSE OSCILLATIONS ; DENSITY STRATIFICATION ; RESONANT ABSORPTION ; TRANSITION-REGION ; MAGNETIC-FIELDS ; HINODE/EIS ; EXPLORER ; PROFILE ; WAVES ; TRACE
Indexed BySCI
Language英语
WOS Research AreaScience & Technology - Other Topics
WOS SubjectMultidisciplinary Sciences
WOS IDWOS:000427366200001
PublisherNATURE PUBLISHING GROUP
Citation statistics
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22371
Collection中国科学院紫金山天文台
Corresponding AuthorSu, W.; Ning, Z. J.
Affiliation1.Huazhong Univ Sci & Technol, Sch Phys, 1037 Luoyu Rd, Wuhan 430074, Hubei, Peoples R China
2.Huazhong Univ Sci & Technol, MOE Key Lab Fundamental Phys Quant Measurements, 1037 Luoyu Rd, Wuhan, Hubei, Peoples R China
3.Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
4.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Jiangsu, Peoples R China
5.Chinese Acad Sci, Natl Astron Observ, Key Lab Solar Act, Beijing 100012, Peoples R China
6.Univ Sheffield, Solar Phys & Space Plasma Res Ctr SP2RC, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England
7.Eotvos Lorand Univ, Dept Astron, Pazmany P Setany 1-A, H-1117 Budapest, Hungary
Recommended Citation
GB/T 7714
Su, W.,Guo, Y.,Erdelyi, R.,et al. Period Increase and Amplitude Distribution of Kink Oscillation of Coronal Loop[J]. SCIENTIFIC REPORTS,2018,8:13.
APA Su, W..,Guo, Y..,Erdelyi, R..,Ning, Z. J..,Ding, M. D..,...&Tan, B. L..(2018).Period Increase and Amplitude Distribution of Kink Oscillation of Coronal Loop.SCIENTIFIC REPORTS,8,13.
MLA Su, W.,et al."Period Increase and Amplitude Distribution of Kink Oscillation of Coronal Loop".SCIENTIFIC REPORTS 8(2018):13.
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