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Multiwavelength Analysis of the Kinematics of a Long Duration Flare-CME Event on 27 January 2012
Solar Physics ( IF 2.7 ) Pub Date : 2020-09-01 , DOI: 10.1007/s11207-020-01693-1
G. Selvarani , S. Prasanna Subramanian , A. Shanmugaraju , K. Suresh

We present a detailed analysis of a long-duration flare associated with a coronal mass ejection (CME) event that occurred on 27 January 2012 in the active region (AR) 11402. We analyze the kinematics of the CME and the close relationship between the flare, radio burst, and CME. We used STEREO (Solar Terrestrial Relations Observatory)/EUVI A (Extreme Ultraviolet Imager) and white light data from STEREO (COR1 A and COR2 A) and LASCO (Large Angle and Spectrometric COronagraph) (C2/C3) coronagraphs, and X-ray data from the GOES (Geostationary Operational Environmental Satellite) spacecraft. The height of the CME is measured using the Graduated Cylindrical Shell (GCS) model. Our results show that: i) the speed of the CME (1460 km/s at $2.54~\mbox{R}_{\odot}$ ) is comparable to the speed of the type II radio burst (1581 km/s), ii) the height of the type II radio burst is lower than that of the CME leading edge, iii) the CME acceleration phase is found to be related to the rise time of the flare and its propagation phase is related to the decay phase of the flare, iv) the type II radio burst origin is likely to be near the CME region where a CME-streamer interaction takes place around $1.6~\mbox{R}_{\odot}$ , and v) the sequence of events and the CME kinematics show a close association between the CME and type II radio emissions.

中文翻译:

2012 年 1 月 27 日长时间耀斑-CME 事件运动学的多波长分析

我们详细分析了与 2012 年 1 月 27 日在活动区 (AR) 11402 发生的日冕物质抛射 (CME) 事件相关的长期耀斑。我们分析了 CME 的运动学和耀斑之间的密切关系、射电暴和 CME。我们使用了 STEREO(太阳陆地关系天文台)/EUVI A(极紫外成像仪)和来自 STEREO(COR1 A 和 COR2 A)和 LASCO(大角度和光谱 COronagraph)(C2/C3)日冕仪和 X 射线的白光数据来自 GOES(地球静止运行环境卫星)航天器的数据。CME 的高度是使用分级圆柱壳 (GCS) 模型测量的。我们的结果表明:i)CME 的速度(1460 公里/秒,$2.54~\mbox{R}_{\odot}$)与 II 型无线电爆发的速度(1581 公里/秒)相当,
更新日期:2020-09-01
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