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Multi-wavelength observation results of the C5.6 limb flare of 1 August 2003
Li, H; You, JQ; Du, QS; Yu, XF
2004-11-01
Source PublicationSOLAR PHYSICS
ISSN0038-0938
Volume225Issue:1Pages:75-90
AbstractWe obtained a complete set of Ha, CaII 8542 angstrom and He I 10830 angstrom spectra and slitjaw H alpha images of the C5.6 limb flare of 1 August 2003 using the Multi-channel Infrared Solar Spectrograph ( MISS) at Purple Mountain Observatory. This flare was also observed by the Reuven Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) and partially by the Extreme-ultraviolet Imaging Telescope (EIT) on SOHO. This flare underwent a rapid rising and expanding episode in the impulsive phase. All the H alpha, CaII 8542 angstrom and He I 10830 angstrom profiles of the flare are rather wide and the widest profiles were observed in the middle bright part of the flare instead of at the flare loop top near the flare maximum. The flare manifested obvious rotation in the flare loop and the decrease of the rotation angular speed with time at the loop-top may imply a de-twisting process of the magnetic field. The significant increases of the Doppler widths of these lines in the impulsive phase reflect quick heating of the chromosphere, and rapid rising and expanding of the flare loop. The RHESSI observations give a thermal energy spectrum for this flare, and two thermal sources and no non-thermal source are found in the reconstructed RHESSI images. This presumably indicates that the energy transfer in this flare is mainly by heat conduction. The stronger thermal source is located near the solar limb with its position unchanged in the flare process and spatially coincident with the intense EUV and H alpha emissions. The weaker one moved during the flare process and is located in the H alpha dark cavities. This flare may support the theory of the magnetic reconnections in the lower solar atmosphere.
KeywordK-line Profiles H-alpha Chromospheric Flares Nonthermal Processes Lower Atmosphere Particle Beams Electron-beam Solar-flares Soho Mission X1.5 Flare
Subject AreaAstronomy & Astrophysics
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1007/s11207-004-3260-7
WOS KeywordK-LINE PROFILES ; H-ALPHA ; CHROMOSPHERIC FLARES ; NONTHERMAL PROCESSES ; LOWER ATMOSPHERE ; PARTICLE BEAMS ; ELECTRON-BEAM ; SOLAR-FLARES ; SOHO MISSION ; X1.5 FLARE
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000228175900005
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/7725
Collection太阳高能及相关物理过程研究团组
AffiliationChinese Acad Sci, Purple Mt Observ, Nanjing 210008, Peoples R China
Recommended Citation
GB/T 7714
Li, H,You, JQ,Du, QS,et al. Multi-wavelength observation results of the C5.6 limb flare of 1 August 2003[J]. SOLAR PHYSICS,2004,225(1):75-90.
APA Li, H,You, JQ,Du, QS,&Yu, XF.(2004).Multi-wavelength observation results of the C5.6 limb flare of 1 August 2003.SOLAR PHYSICS,225(1),75-90.
MLA Li, H,et al."Multi-wavelength observation results of the C5.6 limb flare of 1 August 2003".SOLAR PHYSICS 225.1(2004):75-90.
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