PMO OpenIR  > 太阳活动的多波段观测研究团组
IMAGING AND SPECTRAL OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN A SOLAR FLARE
Li, D.1,2; Ning, Z. J.1; Zhang, Q. M.1
2015-07-01
Source PublicationASTROPHYSICAL JOURNAL
Volume807Issue:1Pages:72
AbstractWe explore the quasi-periodic pulsations (QPPs) in a solar flare observed by Fermi Gamma-ray Burst Monitor, Solar Dynamics Observatory, Solar Terrestrial Relations Observatory, and Interface Region Imaging Spectrograph (IRIS) on 2014 September 10. QPPs are identified as the regular and periodic peaks on the rapidly varying components, which are the light curves after removing the slowly varying components. The QPPs display only three peaks at the beginning on the hard X-ray emissions, but 10 peaks on the chromospheric and coronal line emissions, and more than seven peaks (each peak corresponds. to a type III burst on the dynamic spectra) at the radio emissions. A. uniform quasi-period of about 4 minutes is detected among them. AIA imaging observations exhibit that the 4-minute. QPPs originate from the flare ribbon. and tend to appear on the ribbon front. IRIS spectral observations show that each peak of the QPPs tends to a broad line width and a red Doppler velocity at C I, O IV, Si IV, and Fe XXI lines. Our findings indicate that the QPPs are produced by the non-thermal electrons that are accelerated by the induced quasi-periodic magnetic reconnections in this flare.
KeywordLine: Profiles Sun: Oscillations Sun: Radio Radiation Sun: Uv Radiation Sun: X-rays, Gamma-rays Techniques: Spectroscopic
Subject Area天文和天体物理
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1088/0004-637X/807/1/72
WOS KeywordDOPPLER-SHIFT OSCILLATIONS ; CORONAL LOOP OSCILLATIONS ; HARD X-RAYS ; MAGNETIC-FIELD RECONNECTION ; BRAGG CRYSTAL SPECTROMETER ; RADIO-BURSTS ; MAGNETOHYDRODYNAMIC OSCILLATIONS ; ELECTRON-BEAMS ; EMERGING FLUX ; SUPRA-ARCADE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000358945200072
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/14915
Collection太阳活动的多波段观测研究团组
Affiliation1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Li, D.,Ning, Z. J.,Zhang, Q. M.. IMAGING AND SPECTRAL OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN A SOLAR FLARE[J]. ASTROPHYSICAL JOURNAL,2015,807(1):72.
APA Li, D.,Ning, Z. J.,&Zhang, Q. M..(2015).IMAGING AND SPECTRAL OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN A SOLAR FLARE.ASTROPHYSICAL JOURNAL,807(1),72.
MLA Li, D.,et al."IMAGING AND SPECTRAL OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN A SOLAR FLARE".ASTROPHYSICAL JOURNAL 807.1(2015):72.
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