论文标题
无线电源猎户座MR的适当动作,以前称为Orion N,以及在Orion Bn/Kl中具有较大适当动作的新来源
Proper Motions of the Radio Source Orion MR, Formerly Known as Orion n, and New Sources with Large Proper Motions in Orion BN/KL
论文作者
论文摘要
1980年检测到称为Orion N的红外源,并用3.8米的英国红外望远镜进行了观察。大约二十年后,用非常大的阵列进行的敏感观察表明,MJY双重无线电源显然与红外源n在一起。假定无线电源是红外源的对应物。但是,多年来,已经得出结论,无线电源向南部显示出较大的适当动作,而红外源n则是静止的。在这里,我们重新分析了无线电源的适当动作,添加了比以前使用的较新的和更新的VLA观测值。我们确认无线电源的适当动作,目前不再与红外源重合。解决这个问题的解决方案很可能是,红外源N和无线电源不是相同的对象:红外源是该地区的固定物体,而无线电对应物是由于大约500年前在该地区发生的爆炸而移动的,并且驱逐了大量的分子气体以及多个压缩源。考虑到第一次报告的论文,我们将此双重无线电源称为Orion MR。 此外,我们使用这些新观察结果充分证实了来源IRC23和Zapata 11的大量适当动作。与Sources bn,I,I,Orion MR和X一起,至少有六个紧凑型来源从Orion Bn/Kl中的共同点退出。但是,IRC23是特殊的,因为它的弹出年龄似乎仅为$ \ sim $ 300。从那时起,相对较大的来源排除了可能的机制,即经典的三体情况,只有两个逃脱的尸体:一个紧密的二进制加上遇到的第三颗星。
The infrared source known as Orion n was detected in 1980 with observations made with the 3.8-m United Kingdom Infrared Telescope. About two decades later, sensitive observations made with the Very Large Array revealed the presence of a mJy double radio source apparently coincident in position with the infrared source n. The radio source was assumed to be the counterpart of the infrared source. However, over the years it has been concluded that the radio source shows large proper motions to the south while the infrared source n is stationary. Here we reanalyze the proper motions of the radio source adding both older and newer VLA observations than previously used. We confirm the proper motions of the radio source that at present no longer coincides positionally with the infrared source. The solution to this problem is, most probably, that the infrared source n and the radio source are not the same object: the infrared source is a stationary object in the region while the radio counterpart is moving as a result of the explosion that took place in this region some 500 years ago and that expelled large amounts of molecular gas as well as several compact sources. Considering the paper where it was first reported, we refer to this double radio source as Orion MR. In addition, we use these new observations to fully confirm the large proper motions of the sources IRc23 and Zapata 11. Together with sources BN, I, Orion MR, and x, there are at least six compact sources that recede from a point in common in Orion BN/KL. However, IRc23 is peculiar in that its ejection age appears to be only $\sim$300 years. The relatively large number of sources rules out as a possible mechanism the classic three-body scenario since then only two escaping bodies are expected: a tight binary plus the third star involved in the encounter.