CHROMOSPHERIC EVAPORATION IN AN X1.0 FLARE ON 2014 MARCH 29 OBSERVED WITH IRIS AND EIS
文献类型：期刊论文
| 作者 | Li, Y.1,2; Ding, M. D.1,2; Qiu, J.3; Cheng, J. X.4 |
| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2015-09-20 |
| 卷号 | 811期号:1页码:1 |
| 关键词 | line: profiles Sun: corona Sun: flares Sun: UV radiation |
| 英文摘要 | Chromospheric evaporation refers to dynamic mass motions in flare loops as a result of rapid energy deposition in the chromosphere. These motions have been observed as blueshifts in X-ray and extreme-ultraviolet (EUV) spectral lines corresponding to upward motions at a few tens to a few hundreds of km s(-1). Past spectroscopic observations have also revealed a dominant stationary component, in addition to the blueshifted component, in emission lines formed at high temperatures (similar to 10 MK). This is contradictory to evaporation models predicting predominant blueshifts in hot lines. The recently launched Interface Region Imaging Spectrograph (IRIS) provides high-resolution imaging and spectroscopic observations that focus on the chromosphere and transition region in the UV passband. Using the new IRIS observations, combined with coordinated observations from the EUV Imaging Spectrometer, we study the chromospheric evaporation process from the upper chromosphere to the corona during an X1.0 flare on 2014 March 29. We find evident evaporation signatures, characterized by Doppler shifts and line broadening, at two flare ribbons that are separating from each other, suggesting that chromospheric evaporation takes place in successively formed flaring loops throughout the flare. More importantly, we detect dominant blueshifts in the high-temperature Fe XXI line (similar to 10 MK), in agreement with theoretical predictions. We also find that, in this flare, gentle evaporation occurs at some locations in the rise phase of the flare, while explosive evaporation is detected at some other locations near the peak of the flare. There is a conversion from gentle to explosive evaporation as the flare evolves. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | LOOP RADIATIVE HYDRODYNAMICS ; ULTRAVIOLET IMAGING SPECTROMETER ; CORONAL DIAGNOSTIC SPECTROMETER ; SOLAR MAXIMUM MISSION ; HIGH TIME RESOLUTION ; IMPULSIVE PHASE ; EXTREME-ULTRAVIOLET ; MOMENTUM BALANCE ; X-FLARE ; HINODE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000363471600007 |
| 源URL | [http://119.78.226.72/handle/331011/28386]  |
| 专题 | 上海天文台_天文地球动力学研究中心 |
| 作者单位 | 1.Nanjing Univ, Sch Astron & Space Sci, Nanjing 210093, Jiangsu, Peoples R China 2.Nanjing Univ, Key Lab Modern Astron & Astrophys, Minist Educ, Nanjing 210093, Jiangsu, Peoples R China 3.Montana State Univ, Dept Phys, Bozeman, MT 59717 USA 4.Chinese Acad Sci, Shanghai Astron Observ, Shanghai 200030, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Y.,Ding, M. D.,Qiu, J.,et al. CHROMOSPHERIC EVAPORATION IN AN X1.0 FLARE ON 2014 MARCH 29 OBSERVED WITH IRIS AND EIS[J]. ASTROPHYSICAL JOURNAL,2015,811(1):1. |
| APA | Li, Y.,Ding, M. D.,Qiu, J.,&Cheng, J. X..(2015).CHROMOSPHERIC EVAPORATION IN AN X1.0 FLARE ON 2014 MARCH 29 OBSERVED WITH IRIS AND EIS.ASTROPHYSICAL JOURNAL,811(1),1. |
| MLA | Li, Y.,et al."CHROMOSPHERIC EVAPORATION IN AN X1.0 FLARE ON 2014 MARCH 29 OBSERVED WITH IRIS AND EIS".ASTROPHYSICAL JOURNAL 811.1(2015):1. |
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