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题名: IMAGING AND SPECTRAL OBSERVATIONS OF QUASI-PERIODIC PULSATIONS IN A SOLAR FLARE
作者: Li, D.1, 2; Ning, Z. J.1; Zhang, Q. M.1
刊名: ASTROPHYSICAL JOURNAL
出版日期: 2015-07-01
卷号: 807, 期号:1, 页码:72
关键词: line: profiles ; Sun: oscillations ; Sun: radio radiation ; Sun: UV radiation ; Sun: X-rays, gamma-rays ; techniques: spectroscopic
学科分类: 天文和天体物理
DOI: 10.1088/0004-637X/807/1/72
文章类型: Article
英文摘要: We 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.
WOS标题词: Science & Technology ; Physical Sciences
类目[WOS]: Astronomy & Astrophysics
研究领域[WOS]: Astronomy & Astrophysics
关键词[WOS]: DOPPLER-SHIFT OSCILLATIONS ; CORONAL LOOP OSCILLATIONS ; HARD X-RAYS ; MAGNETIC-FIELD RECONNECTION ; BRAGG CRYSTAL SPECTROMETER ; RADIO-BURSTS ; MAGNETOHYDRODYNAMIC OSCILLATIONS ; ELECTRON-BEAMS ; EMERGING FLUX ; SUPRA-ARCADE
收录类别: SCI
所属项目名称: PMO_LIB-IR
语种: 英语
WOS记录号: WOS:000358945200072
Citation statistics:
内容类型: 期刊论文
URI标识: http://libir.pmo.ac.cn/handle/332002/14915
Appears in Collections:太阳活动的多波段观测研究团组_期刊论文

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作者单位: 1.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
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