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Explosive Chromospheric Evaporation Driven by Nonthermal Electrons around One Footpoint of a Solar Flare Loop
Li, D.1,2,3; Ning, Z. J.1; Huang, Y.1; Zhang, Q. M.1,2
2017-05-20
发表期刊ASTROPHYSICAL JOURNAL LETTERS
卷号841期号:1
摘要We explore the temporal relationship between microwave/hard X-ray (HXR) emission and Doppler velocity during the impulsive phase of a solar flare on 2014 October 27 (SOL2014-10-27) that displays a pulse on the light curves in the microwave (34 GHz) and HXR (25-50 keV) bands before the flare maximum. Imaging observation shows that this pulse mainly comes from one footpoint of a solar flare loop. The slit of the Interface Region Imaging Spectrograph (IRIS) stays at this footpoint during this solar flare. The Doppler velocities of Fe XXI. 1354.09 angstrom and Si IV. 1402.77. angstrom are extracted from the Gaussian fitting method. We find that the hot line of Fe XXI. 1354.09 angstrom (log T similar to 7.05) in the corona exhibits blueshift, while the cool line of Si IV. 1402.77 angstrom (log T similar to 4.8) in the transition region exhibits redshift, indicating explosive chromospheric evaporation. Evaporative upflows along the flare loop are also observed in the AIA 131 angstrom image. To our knowledge, this is the first report of chromospheric evaporation evidence from both spectral and imaging observations in the same flare. Both microwave and HXR pulses are well correlated with the Doppler velocities, suggesting that the chromospheric evaporation is driven by nonthermal electrons around this footpoint of a solar flare loop.
文章类型Article
关键词Line: Profiles Sun: Flares Sun: Radio Radiation Sun: Uv Radiation Sun: X-rays Gamma Rays
WOS标题词Science & Technology ; Physical Sciences
资助者NSFC(11603077 ; NSFC(11603077 ; Youth Fund of Jiangsu(BK20161095) ; Youth Fund of Jiangsu(BK20161095) ; Surface Project of Jiangsu(BK 20161618) ; Surface Project of Jiangsu(BK 20161618) ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 11573072 ; 11573072 ; 11473071 ; 11473071 ; 11333009 ; 11333009 ; KLSA201708 ; KLSA201708 ; 2010DP173032) ; 2010DP173032) ; NSFC(11603077 ; NSFC(11603077 ; Youth Fund of Jiangsu(BK20161095) ; Youth Fund of Jiangsu(BK20161095) ; Surface Project of Jiangsu(BK 20161618) ; Surface Project of Jiangsu(BK 20161618) ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 11573072 ; 11573072 ; 11473071 ; 11473071 ; 11333009 ; 11333009 ; KLSA201708 ; KLSA201708 ; 2010DP173032) ; 2010DP173032)
DOI10.3847/2041-8213/aa71b0
关键词[WOS]ULTRAVIOLET IMAGING SPECTROMETER ; OBSERVATIONAL EVIDENCE ; IMPULSIVE PHASE ; IRIS ; RESOLUTION ; HINODE ; SPECTROSCOPY ; MICROFLARE ; CONVERSION ; EVOLUTION
收录类别SCI
语种英语
资助者NSFC(11603077 ; NSFC(11603077 ; Youth Fund of Jiangsu(BK20161095) ; Youth Fund of Jiangsu(BK20161095) ; Surface Project of Jiangsu(BK 20161618) ; Surface Project of Jiangsu(BK 20161618) ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 11573072 ; 11573072 ; 11473071 ; 11473071 ; 11333009 ; 11333009 ; KLSA201708 ; KLSA201708 ; 2010DP173032) ; 2010DP173032) ; NSFC(11603077 ; NSFC(11603077 ; Youth Fund of Jiangsu(BK20161095) ; Youth Fund of Jiangsu(BK20161095) ; Surface Project of Jiangsu(BK 20161618) ; Surface Project of Jiangsu(BK 20161618) ; Youth Innovation Promotion Association CAS ; Youth Innovation Promotion Association CAS ; 11573072 ; 11573072 ; 11473071 ; 11473071 ; 11333009 ; 11333009 ; KLSA201708 ; KLSA201708 ; 2010DP173032) ; 2010DP173032)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000402563400007
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8812
专题射电天文研究部
作者单位1.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210008, Jiangsu, Peoples R China
2.Natl Astron Observ, CAS Key Lab Solar Act, Beijing 100012, Peoples R China
3.Nanjing Univ, Minist Educ, Key Lab Modern Astron & Astrophys, Nanjing 210023, Jiangsu, Peoples R China
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Li, D.,Ning, Z. J.,Huang, Y.,et al. Explosive Chromospheric Evaporation Driven by Nonthermal Electrons around One Footpoint of a Solar Flare Loop[J]. ASTROPHYSICAL JOURNAL LETTERS,2017,841(1).
APA Li, D.,Ning, Z. J.,Huang, Y.,&Zhang, Q. M..(2017).Explosive Chromospheric Evaporation Driven by Nonthermal Electrons around One Footpoint of a Solar Flare Loop.ASTROPHYSICAL JOURNAL LETTERS,841(1).
MLA Li, D.,et al."Explosive Chromospheric Evaporation Driven by Nonthermal Electrons around One Footpoint of a Solar Flare Loop".ASTROPHYSICAL JOURNAL LETTERS 841.1(2017).
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