| Hα Line Polarization in the 2B／X4.8 Flare of 2002 July 23 |
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| 作者单位： | Zhi Xu,Qing-Rong Chen,Cheng Fang(Department of Astronomy, Nanjing University, Nanjing 210093);N.M.Firstova(Institute of Solar-Terrestrial Physics, Russian Academy of Sciences, Siberian Division, Russia) |
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| 基金项目： | 国家自然科学基金，Russian Foundation for Basic Research，国家自然科学基金，NKBRSFG |
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| 摘 要： | On 2002 July23,a 2B/X4.8 flare was observed in the Hα line spec-tropolarimetrically by the Large Solar Vacuum Telescope of Baikal Astrophysical Observatory.Linear polarization of 3%-10% was detected in the Hα line,particu-larly where the line showed central reversal.The linear polarization is mainly radial on the solar disk and appears at the impulsive phase of the hard X-ray and γ-ray bursts.It is limited to some relatively small regions of the flare.The polarization in a limited small region(～4″-5″）changed its direction within a short period of time(～10s).
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| 关 键 词： | 天体物理观测 线性偏振作用 太阳观测 脉冲波 耀斑 |
Hα Line Polarization in the 2B/X4.8 Flare of 2002 July 23 |
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| Authors: | Zhi Xu NMFirstova Qing-Rong Chen Cheng Fang |
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| Institution: | [1]DepartmentofAstronomy,NanjingUniversity,Nanjing210093 [2]InstituteofSolar-TerrestrialPhysics,RussianAcademyofSciences,SiberianDivision,Russia |
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| Abstract: | |
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| Keywords: | Polarization-line: profile-Sun: flare |
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