| An investigation of flare emissions at multiple wavelengths |
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| 作者姓名： | 李东 Alexander Warmuth 卢磊 宁宗军 |
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| 作者单位： | Key Laboratory for Dark Matter and Space Science;CAS Key Laboratory of Solar Activity;State Key Laboratory of Space Weather;Leibniz-Institut für Astrophysik Potsdam（AIP）;School of Astronomy and Space Science |
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| 基金项目： | supported by the National Natural Science Foundation of China(Grant Nos.11973092,11790300,11790302,11729301 and12073081);the Strategic Priority Research Program on Space Science,Chinese Academy of Sciences(Grant Nos.XDA15052200 and XDA15320301);supported by the Specialized Research Fund for State Key Laboratories and CAS Strategic Pioneer Program on Space Science(KLSA202003);The Laboratory No.is2010DP173032.;supported by DLR(Grant No.50 QL 1701)。 |
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| 摘 要： | We report multi-wavelength observations of four solar flares on 2014 July 07.We firstly select these flares according to the soft X-ray(SXR)and extreme ultraviolet(EUV)emissions recorded by the Extreme Ultraviolet Variability Experiment and Geostationary Orbiting Environmental S atellites.Then their locations and geometries are identified from the full-disk images measured by the Atmospheric Imaging Assembly(AIA),and the time delays among the light curves in different channels are identified.The electron number densities are estimated using the differential emission measure method.We find that three of four flares show strong emissions in SXR channels and high temperature(>6 MK)EUV wavelengths during the impulsive phase,i.e.,AIA 131 A and 94 A,and then they emit peak radiation subsequently in the middle temperature(~0.6-3 MK)EUV channels.Moreover,they last for a long time and have smaller electron densities,which are probably driven by the interaction of hot diffuse flare loops.Only one flare emits radiation at almost the same time in all the observed wavelengths,lasts for a relatively short time,and has a larger electron density.It is also accompanied by a typeⅢradio burst.The bright emission at the EUV channel could be corresponding to the associated erupting filament.
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| 关 键 词： | Sun:flares Sun:radio radiation Sun:UV radiation Sun:X-rays gamma rays |
An investigation of flare emissions at multiple wavelengths |
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| Dong Li,Alexander Warmuth,Lei Lu,Zongjun Ning.An investigation of flare emissions at multiple wavelengths[J].Research in Astronomy and Astrophysics,2021(3):149-157. |
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| Authors: | Dong Li Alexander Warmuth Lei Lu Zongjun Ning |
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| Institution: | (Key Laboratory for Dark Matter and Space Science,Purple Mountain Observatory,Chinese Academy of Sciences,Nanjing 210033,China;CAS Key Laboratory of Solar Activity,National Astronomical Observatories,Beijing 100101,China;State Key Laboratory of Space Weather,Chinese Academy of Sciences,Beijing 100190,China;Leibniz-Institut für Astrophysik Potsdam(AIP),An der Sternwarte 16,14482 Potsdam,Germany;School of Astronomy and Space Science,University of Science and Technology of China,Hefei 230026,China) |
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