Radio Galaxies at TeV Energies
Radio Galaxies at TeV Energies
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DOI：
10.3390/galaxies10030061
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发表时间：
2022-04
期刊：
影响因子：
2.5
通讯作者：
C. Rulten
中科院分区：
文献类型：
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作者：
C. Rulten
与耀变体不同，射电星系的喷流与我们的视线不一致。这种错位的几何结构为我们提供了一个独特的视角来观察喷流和超大质量黑洞。到目前为止，四个射电星系已被检测到TeV的能量与额外的两个活动星系核表现出射电星系和BL Lac型属性。对射电星系的TeV观测揭示了这些天体的迷人之处，它们显示出超快的变化性和通常相对较硬的光谱能量分布。这项工作的目的是在甚高能γ射线天文学范围内审查射电星系观测的现状，同时也强调射电星系是多波长观测的极好目标。提供了一些继续研究射电星系的动机，并重点讨论了关键的观测结果，包括对即将投入使用的下一代仪器的未来观测的影响。
Unlike blazars, radio galaxies have jets that are misaligned relative to our line-of-sight. This misaligned geometry provides us with a unique view of both the jet and super massive black hole. To date, four radio galaxies have been detected at TeV energies with an additional two active galactic nuclei shown to exhibit both radio galaxy and BL Lac-type properties. TeV observations of radio galaxies have revealed these objects to be fascinating, displaying ultra-fast variability and often relatively hard spectral energy distributions. This work aims to provide a review of the current state of radio galaxy observations within the context of very-high-energy γ-ray astronomy, while also highlighting that radio galaxies are excellent targets for multi-wavelength observations. A number of motivations for the continued study of radio galaxies are provided, and these are discussed with a focus on the key observational results, including implications for future observations with next-generation instruments soon to be operational.