论文标题
W49 North的庞大的年轻失控明星
A Massive Young Runaway Star in W49 North
论文作者
论文摘要
我们分析了1998年和2016年获得的W49 North Massive Star成型区域的高角度分辨率45.5 GHz图像，其阵列非常大。在观测值的时间间隔内，大多数超级校准HII区域都没有显示可检测到的变化。但是，亚组成部分B1，B2，G2A和G2C通过3.8至21.4％的值增加了其峰值通量密度。最有趣的是，C彗星区C清楚地表明，在该区域的距离上等同于76 $ \ pm $ 6 km S $^{ - 1} $的速度在天空飞机上。我们将该区域解释为大约6,400年前从韦尔奇戒指的东部边缘弹出的失控的O6 ZAMS恒星产生的电离弓箭。
We analyzed high angular resolution 45.5 GHz images of the W49 North massive star forming region obtained in 1998 and 2016 with the Very Large Array. Most of the ultracompact HII regions show no detectable changes over the time interval of the observations. However, subcomponents B1, B2, G2a and G2c have increased its peak flux densities by values in the range of 3.8 to 21.4 \%. Most interestingly, the cometary region C clearly shows proper motions that at the distance of the region are equivalent to a velocity of 76$\pm$6 km s$^{-1}$ in the plane of the sky. We interpret this region as the ionized bowshock produced by a runaway O6 ZAMS star that was ejected from the eastern edge of Welch's ring about 6,400 years ago.
