标题： 猎户座 BN/KL 区域中的双射电源 n 的自行 显示英文标题

标题： The Proper Motions of the Double Radio Source n in the Orion BN/KL Region

摘要： 我们延长了猎户座BN/KL区域射电源自行观测的时间基线，从14.7年增加到22.5年。 我们给出了BN源和I源的改进测定结果。 此外，我们讨论了双射电源n的自行，这些自行在文献中曾受到质疑。 我们确认这三个源都在以横跨速度为数十 km/s$^{-1}$从它们大约500年前所在位置之间的一个区域移开。 源n表现出一个新的分量，我们认为这是由于2006.36年后发生的一次单侧喷射自由-自由发射等离子体事件。 我们利用BN源和I源之间高度精确的相对自行来确定它们最近距离发生在1475$\pm$6年，当时它们在天球平面上彼此相距不超过$\sim$100天文单位。 显示英文摘要

摘要： We have extended the time baseline for observations of the proper motions of radio sources in the Orion BN/KL region from 14.7 to 22.5 years. We present improved determinations for the sources BN and I. In addition, we address the proper motions of the double radio source n, that have been questioned in the literature. We confirm that all three sources are moving away at transverse velocities of tens of km s$^{-1}$ from a region in-between them, where they were located about 500 years ago. Source n exhibits a new component that we interpret as due to a one-sided ejection of free-free emitting plasma that took place after 2006.36. We used the highly accurate relative proper motions between sources BN and I to determine that their closest separation took place in the year 1475$\pm$6, when they were within $\sim$100 AU or less from each other in the plane of the sky.