论文标题
NGC 2663中的Kiloparsec-Scale Radio Jets的准直
Collimation of the kiloparsec-scale radio jets in NGC 2663
论文作者
论文摘要
我们提出了在附近的椭圆星系NGC 2663周围的高度填充无线电飞机，跨越了总计355 kpc，并且可能在千帕克尺度上首次检测回忆。到达银河系的距离很小（〜28.5 MPC）使我们能够解决喷气机的部分以检查其结构。我们结合了多波长数据：Murchison广场阵列（MWA），澳大利亚平方公里阵列探路者（ASKAP）和澳大利亚望远镜紧凑型阵列（ATCA）以及Chandra，Swiftra，Swift和Srg/Erosita的X射线数据。我们提出强度，旋转度量，极化，光谱指数和X射线环境图。南部喷气机的区域同时缩小和亮度，可以将其解释为外部，环境压力对喷气机进行回忆的标志，尽管它也与间歇性的主动银河系核（AGN）或复杂的内部喷射结构一致。 X射线数据表明环境极为差。如果射流确实是回忆的，则大型回忆量表（40 kpc）与低密度环境中的慢速射流一致。
We present the discovery of highly-collimated radio jets spanning a total of 355 kpc around the nearby elliptical galaxy NGC 2663, and the possible first detection of recollimation on kiloparsec scales. The small distance to the galaxy (~28.5 Mpc) allows us to resolve portions of the jets to examine their structure. We combine multiwavelength data: radio observations by the Murchison Widefield Array (MWA), the Australian Square Kilometre Array Pathfinder (ASKAP) and the Australia Telescope Compact Array (ATCA), and X-ray data from Chandra, Swift and SRG/eROSITA. We present intensity, rotation measure, polarisation, spectral index and X-ray environment maps. Regions of the southern jet show simultaneous narrowing and brightening, which can be interpreted as a signature of the recollimation of the jet by external, environmental pressure, though it is also consistent with an intermittent Active Galactic Nuclei (AGN) or complex internal jet structure. X-ray data suggest that the environment is extremely poor; if the jet is indeed recollimating, the large recollimation scale (40 kpc) is consistent with a slow jet in a low-density environment.
