论文标题
不对称的陶艺气泡作为卷乳媒体风的证据
Asymmetric eROSITA bubbles as the evidence of a circumgalactic medium wind
论文作者
论文摘要
通过具有相同名称的仪器检测到Erosita气泡。北部的气泡显示出明显的不对称特征，包括对西部的扭曲和东部边缘的增强，而南部对应物则显着变暗。他们的起源是辩论的。在这里，我们进行了流体动力学模拟，表明不对称的Erosita气泡有利于动态的，环境中的中风模型，但不利于其他机制，例如非轴对称光晕气或倾斜的核流出。在银河坐标的北方方向从东部的风中，北晕式吹动，速度约为200 km s $^{ - 1} $，其中一部分进入了南部的光环。这会产生动态的光环培养基，并在内部重新分布密度和金属性。这自然解释了形态和表面亮度中的不对称气泡。我们的结果表明，我们的银河系在提供流出反馈的同时，从一侧积聚了低积极的环境培养基。
The eROSITA bubbles are detected via the instrument with the same name. The northern bubble shows noticeable asymmetric features, including distortion to the west and enhancement in the eastern edge, while the southern counterpart is significantly dimmer. Their origins are debated. Here, we performed hydrodynamic simulations showing that asymmetric eROSITA bubbles favor a dynamic, circumgalactic medium wind model, but disfavor other mechanisms such as a non-axisymmetric halo gas or a tilted nuclear outflow. The wind from the east by north direction in Galactic coordinates blows across the northern halo with a velocity of about 200 km s$^{-1}$, and part of it enters the southern halo. This creates a dynamic halo medium and redistributes both density and metallicity within. This naturally explains the asymmetric bubbles in both the morphology and surface brightness. Our results suggest that our Galaxy is accreting low-abundance circumgalactic medium from one side while providing outflow feedback.
