行星状星云KjPn 8异常巨叶的膨胀自行
The expansion proper motions of the extraordinary giant lobes of the planetary nebula KjPn 8 revisited
摘要：
其主要目的是确定一个与非凡行星状星云KjPn 8的距离的确切值。第二个目标是测量这个天体的三个巨大裂片的年龄，以及估计导致最具能量外流的爆发中的能量，以与中等光度光学瞬变（OPT）进行比较。为此目的，2011年使用新的Aristarchos望远镜获得了Halpha+[N II]光学发射线的图像马赛克，以与POSSI-R 1954和POSSII-R 1991板上的KjPn 8巨型瓣的图像进行比较。膨胀自行的功能在这57年的基线流出。利用这些数据，我们得到了KjPn 8的确切距离为1.8 +- 0.3千秒差距。从哈勃望远镜拍摄的星云核心图像中，我们已经确定了最近一次外流到天空的角度。以前，弓激波模型的不确定性预测用于此目的。形成KjPn 8巨型叶瓣的三个独立外流的动力学年龄也分别直接测量为3200、7200和>= 5x10^4年，这证实了它们的顺序喷射。此外，其中最年轻和最有活力的天体的动能测量值为~10^47尔格，这与地球物理学的起源是一致的。
英文摘要：
The primary aim is to establish a firm value for the distance to the extraordinary planetary nebula KjPn 8. Secondary aims are to measure the ages of the three giant lobes of this object as well as estimate the energy in the eruption, that caused the most energetic outflow, for comparison with that of an intermediate luminosity optical transient (ILOT). For these purposes a mosaic of images in the Halpha+[N II] optical emission lines has been obtained with the new Aristarchos telescope in 2011 for comparison with the images of the KjPn 8 giant lobes present on the POSSI-R 1954 and POSSII-R 1991 plates. Expansion proper motions of features over this 57 yr baseline in the outflows are present. Using these, a firm distance to KjPn 8 of 1.8 +- 0.3 kpc has been derived for now the angle of the latest outflow to the sky has been established from HST imagery of the nebular core. Previously, the uncertain predictions of a bow-shock model were used for this purpose. The dynamical ages of the three separate outflows that form the giant lobes of KjPn 8 are also directly measured as 3200, 7200 and >= 5x10^4 yr respectively which confirms their sequential ejection. Moreover, the kinetic energy of the youngest and most energetic of these is measured as ~10^47 erg which is compatible with an ILOT origin.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
