The analysis of the deflection of coronal mass ejection (CME) events plays an important role in the improvement of the forecasting of their geo-effectiveness. Motivated by the scarcity of comprehensive studies of CME events with a focus on the governing conditions that drive deflections during their early stages, we performed an extensive analysis of 13 CME events that exhibited large deflections during their early development in the low corona. The study was carried out by exploiting solar-corona-imaging observations at different heights and wavelengths from instruments onboard several space- and ground-based solar observatories, namely the Project for Onboard Autonomy 2 (PROBA2), Solar Dynamics Observatory (SDO), Solar TErrestrial RElations Observatory (STEREO), Solar and Heliospheric Observatory (SOHO) spacecraft, and from the National Solar Observatory (NSO). The selected events were observed between October 2010 and September 2011, to take advantage of the location in near quadrature of the STEREO spacecraft and Earth in this time period. In particular, we determined the 3D trajectory of the front envelope of the CMEs and their associated prominences with respect to their solar sources by means of a forward-modeling and tie-pointing tool, respectively. By using a potential-field source-surface model, we estimated the coronal magnetic fields of the ambient medium through which the events propagate to investigate the role of the magnetic-energy distribution in the non-radial propagation of both structures (front envelope and prominence) and in their kinematic properties. The ambient magnetic environment during the eruption and early stages of the events is found to be crucial in determining the trajectory of the CME events, in agreement with previous reports.

中文翻译：

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太阳活动周期上升阶段日珥-CME 事件的大偏转分析 24

日冕物质抛射（CME）事件的偏转分析对于提高其地球有效性预测具有重要作用。由于缺乏对 CME 事件的综合研究，重点是在早期阶段驱动偏转的控制条件，我们对 13 个 CME 事件进行了广泛的分析，这些事件在低日冕的早期发展过程中表现出大的偏转。该研究是通过利用几个空间和地面太阳天文台上的仪器在不同高度和波长下进行的太阳日冕成像观测来进行的，即车载自主项目 2 (PROBA2)、太阳动力学天文台 (SDO)、太阳能地球关系天文台 (STEREO)、太阳和日光层天文台 (SOHO) 航天器，和来自国家太阳天文台 (NSO)。选定的事件是在 2010 年 10 月至 2011 年 9 月期间观测到的，以利用该时间段 STEREO 航天器和地球接近正交的位置。特别是，我们分别通过前向建模和连接点工具确定了 CME 前包络的 3D 轨迹及其相对于太阳能源的相关突起。通过使用势场源表面模型，我们估计了事件传播所通过的环境介质的日冕磁场，以研究磁能分布在两种结构（前包络和日珥）的非径向传播中的作用) 以及它们的运动学特性。