Based on the magnetization, an accretion disk with a large-scale magnetic field can be separated into either standard and normal evolution or magnetically arrested disk (MAD), which are difficult to identify from observations. It is still unclear whether all the radio-loud active galactic nuclei (RLAGNs) with a thin disk and strong radio emissions contain a MAD. We investigate this issue by utilizing the 3CRR catalog. We compile a sample of 35 quasars and 14 high-excitation radio galaxies powered by a thin accretion disk. In order to consistently compare with the MAD sample given by Li et al., the optical-UV emissions of our sample are all detected by the Hubble Space Telescope. It is found that the average X-ray luminosity (LX) of our sample is about 5.0 times higher than that of radio-quiet active galactic nuclei with matching optical-UV luminosity (LUV), in general accord with the factor of 4.5 times in MAD sample within the uncertainty. The relationship between radio (5 GHz) and X-ray (2 keV) luminosities in the 3CRR sources is also found to be consistent with the MAD sample. Furthermore, the jet efficiencies of 3CRR sources are consistent with those from the GRMHD simulations of MAD. Therefore, we suggest that probably all the quasars and at least a fraction of high-excitation radio galaxies in the 3CRR catalog, and perhaps all the RLAGNs with strong radio emissions contain a MAD.

中文翻译：

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3CRR 目录中的所有类星体和高激发射电星系 (HERG) 是否都包含磁阻盘 (MAD)？


根据磁化强度，具有大尺度磁场的吸积盘可以分为标准演化盘和正常演化盘，或者磁滞盘（MAD），这些在观测中很难识别。目前尚不清楚是否所有具有薄盘和强射电发射的无线电响亮活动星系核（RLAGN）都包含 MAD。我们利用 3CRR 目录调查此问题。我们编制了 35 个类星体和 14 个由薄吸积盘驱动的高激发射电星系的样本。为了与Li等人给出的MAD样本进行一致比较，我们样本的光学紫外发射全部由哈勃太空望远镜检测到。结果发现，我们的样本的平均X射线光度（LX）比具有匹配光学紫外光度（LUV）的射电安静活动星系核高出约5.0倍，总体上符合4.5倍的系数。 MAD 样本内的不确定性。 3CRR 源中的无线电 (5 GHz) 和 X 射线 (2 keV) 光度之间的关系也被发现与 MAD 样本一致。此外，3CRR 源的射流效率与 MAD 的 GRMHD 模拟结果一致。因此，我们认为 3CRR 目录中可能所有类星体和至少一部分高激发射电星系，并且可能所有具有强射电发射的 RLAGN 都包含 MAD。