A Compact Source for Quasi-periodic Pulsation in an M-class Solar Flare
Yuan,Ding1,2; Feng,Song3,4; Li,Dong5; Ning,ZongJun5; Tan,Baolin2
Source PublicationThe Astrophysical Journal Letters
AbstractAbstract Quasi-periodic pulsations (QPPs) are usually found in the light curves of solar and stellar flares; they carry the features of time characteristics and plasma emission of the flaring core, and could be used to diagnose the coronas of the Sun and remote stars. In this study, we combined the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory and the Nobeyama Radioheliograph (NoRH) to observe an M7.7 class flare that occurred at active region 11520 on 2012 July 19. A QPP was detected both in the AIA 131 bandpass and the NoRH 17 channel; it had a period of about four minutes. In the spatial distribution of Fourier power, we found that this QPP originated from a compact source and that it overlapped with the X-ray source above the loop top. The plasma emission intensities in the AIA 131 bandpass were highly correlated within this region. The source region is further segmented into stripes that oscillated with distinctive phases. Evidence in this event suggests that this QPP was likely to be generated by intermittent energy injection into the reconnection region.
KeywordMagnetohydrodynamics Solar flares Active solar corona
WOS IDIOP:2041-8205-886-2-ab5648
PublisherThe American Astronomical Society
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Document Type期刊论文
Affiliation1.Institute of Space Science and Applied Technology, Harbin Institute of Technology, Shenzhen, Guangdong 518055, People’s Republic of China
2.Key Laboratory of Solar Activity, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, People’s Republic of China
3.Yunnan Astronomical Observatory, Chinese Academy of Sciences, P.O. Box 110, Kunming 650011, People’s Republic of China
4.Yunnan Key Laboratory of Computer Technology Application, Faculty of Information Engineering and Automation, Kunming University of Science and Technology, Kunming 650500, People’s Republic of China
5.Key Laboratory for Dark Matter and Space Science, Purple Mountain Observatory, Chinese Academy of Sciences, Nanjing 210034, People’s Republic of China
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
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Yuan,Ding,Feng,Song,Li,Dong,et al. A Compact Source for Quasi-periodic Pulsation in an M-class Solar Flare[J]. The Astrophysical Journal Letters,2019,886(2).
APA Yuan,Ding,Feng,Song,Li,Dong,Ning,ZongJun,&Tan,Baolin.(2019).A Compact Source for Quasi-periodic Pulsation in an M-class Solar Flare.The Astrophysical Journal Letters,886(2).
MLA Yuan,Ding,et al."A Compact Source for Quasi-periodic Pulsation in an M-class Solar Flare".The Astrophysical Journal Letters 886.2(2019).
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