由EMU和POSSUM巡天发现的Abell 3718中心的600 kpc复合射电源
A 600 kpc complex radio source at the center of Abell 3718 discovered by the EMU and POSSUM surveys
摘要：
对星系团的多频研究对于推断它们的动力学状态和物理性质至关重要。此外，这些研究使我们能够调查集群嵌入源，其演变的影响，集群本身的物理和动力学条件。到目前为止，由于位于北半球的地基无线电干涉仪具有高保真成像能力，这类研究优先对北半球可见的星团进行。在本文中，我们进行了多频研究鲜为人知的星系团阿贝尔3718。我们调查了未知来源的扩展无线电源的长度为$\sim$ 612千秒差距，在943兆赫的图像中检测到的宇宙进化图（EMU）和极化巡天宇宙的磁性（POSSUM）调查。我们分析了光学和X射线数据，以推断集群的动力学状态，特别是合并活动。我们进行了无线电频谱指数的研究，从943兆赫到9千兆赫。我们还评估了最亮的集群嵌入源的偏振特性，以了解它们是否与更大尺度上观察到的无线电发射有关。[摘要由于arxiv限制而被截断！请参阅pdf版本]
英文摘要：
Multifrequency studies of galaxy clusters are crucial for inferring their dynamical states and physics. Moreover, these studies allow us to investigate cluster-embedded sources, whose evolution is affected by the physical and dynamical condition of the cluster itself. So far, these kinds of studies have been preferentially conducted on clusters visible from the northern hemisphere due to the high-fidelity imaging capabilities of ground-based radio interferometers located there. In this paper, we conducted a multifrequency study of the poorly known galaxy cluster Abell 3718. We investigated the unknown origin of an extended radio source with a length of $\sim$612 kpc at 943 MHz detected in images from the Evolutionary Map of the Universe (EMU) and POlarisation Sky Survey of the Universe's Magnetism (POSSUM) surveys. We analyzed optical and X-ray data to infer the dynamical state of the cluster and, in particular, the merger activity. We conducted a radio spectral index study from 943 MHz up to 9 GHz. We also evaluated the polarization properties of the brightest cluster-embedded sources to understand if they are related to the radio emission observed on larger scales. [Abstract truncated due to arxiv limit! Please see the pdf version]
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。
