标题： 日冕洞对CME偏转的影响：数值研究 显示英文标题

标题： Influence of coronal holes on CME deflections: numerical study

摘要： 理解导致日冕物质抛射（CMEs）偏转的原因对于空间天气预报至关重要。 在本文中，我们研究了靠近抛射区域的日冕洞的不同特性对CME轨迹的影响。 为了进行此分析，我们对理想磁流体动力学方程进行了数值模拟，以模拟在存在日冕洞的情况下CME早期上升的过程。 我们发现，磁场越强，日冕洞面积越宽，CME的偏转越大。 当日冕洞远离抛射区域时，这种效应会减弱。 为了描述这种行为，我们提出一个与日冕洞特性相关的无量纲参数，并能准确量化偏转。 此外，我们还表明，日冕洞靠近CME磁结构会产生一个最小磁能区域，该区域负责偏转。 因此，我们发现了日冕洞特性、该区域的位置和CME偏转之间的关系。 显示英文摘要

摘要： The understanding of the causes that produce the deflection of coronal mass ejections (CMEs) is essential for the space weather forecast. In this article, we study the effects on CMEs trajectories produced by the different properties of a coronal hole close to the ejection area. For this analysis, we perform numerical simulations of the ideal magnetohydrodynamics equations that emulate the early rising of the CME in presence of a coronal hole. We find that, the stronger the magnetic field and the wider the coronal hole area, the larger the CME deflection. This effect is reduced when the coronal hole moves away from the ejection region. To characterize this behavior, we propose a dimensionless parameter that depends on the coronal hole properties and properly quantifies the deflection. Also, we show that the presence of the coronal hole near a CME magnetic structure produces a minimum magnetic energy region which is responsible for the deflection. Thus, we find a relationship between the coronal hole properties, the location of this region and the CME deflection.