B2 1144+ 35 B，一个巨大的低能量射电星系，具有超光速运动。经常性活动的方向和证据
B2 1144+35B, a giant low power radio galaxy with superluminal motion. Orientation and evidence for recurrent activity
摘要：
这项工作的目标是详细研究附近的低功率射电星系B2 1144+ 35 B。为此，我们进行了新的甚长基线阵列（VLBA）和甚大阵列（VLA）观测。这个源有几个属性（明亮，附近，大范围的空间结构，可见的反喷流等）。这使它成为研究射电喷流演化的优秀天体物理实验室。在这里，我们报告的运动在0.23 $\pm$ 0.07 c，这使我们能够估计在33 $^\circ \pm 7^\circ$从视线秒差距尺度喷流的方向，与（0.94 $^{+0.06}_{-0.11}$）c的固有速度的检测。我们还报告了在高频率的核心，我们认为这可能是一个新的组件出现的核心的结果。在5 GHz的高动态范围VLBA观测揭示，第一次，扩展发射连接的核心与明亮的复杂的发射，占主导地位的秒差距尺度结构的通量密度在低于20 GHz的频率。这个明亮的复杂的演变被认为是其缓慢下降的通量密度被解释为与宿主星系的星际介质的相互作用的结果。
英文摘要：
The goal of this work is a detailed study of the nearby, low power radio galaxy B2 1144+35B. For this purpose, we performed new Very Long Baseline Array (VLBA) and Very Large Array (VLA) observations. This source has several properties (bright, nearby, large range of spatial structures, visible counterjet, etc.) that make it an excellent astrophysical laboratory for the study of the evolution of radio jets. Here we report the detection of motion in the counterjet at 0.23 $\pm$ 0.07 c, which allows us to estimate the orientation of the parsec-scale jet at 33$^\circ \pm 7^\circ$ from the line of sight, with an intrinsic velocity of (0.94$^{+0.06}_{-0.11}$)c. We also report on a brightening of the core at high frequencies which we suggest could be the result of a new component emerging from the core. High dynamic range VLBA observations at 5 GHz reveal, for the first time, extended emission connecting the core with the bright complex of emission that dominates the flux density of the parsec scale structure at frequencies below 20 GHz. The evolution of this bright complex is considered and its slow decline in flux density is interpreted as the result of an interaction with the interstellar medium of the host galaxy.
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