论文标题
壁画调查。 vii。 3C无线电源的核的光谱特性，在0.3 <z <0.82
The MURALES survey. VII. Optical spectral properties of the nuclei of 3C radio sources at 0.3<z<0.82
论文作者
论文摘要
缪斯无线电大声发射线快照（壁画）项目的第七篇论文提出了用3C无线电源的VLT/Muse Integrall Field光谱仪获得的观察结果，并讨论了26个对象的光谱特性，具有0.3 <z <z <z <0.82的26个对象的光谱特性（中位数redshift 0.51）。在这些红移中，H $α$和[NII]发射线不被光谱覆盖，并且需要替代诊断图来分离不同的光谱子类。我们仅使用光谱的静电框紫外线和蓝色部分中的发射线比，将强大的光谱分类得出高兴奋星系（HEGS和腿）。一个关键的结果是，在最高级别的无线电功率（最高l $ _ {178} \ sim 2 \ times 10^{35} $ erg/s/s/hz）中，FRII/腿也是如此。此外，它们在FRII RGS人群中的分数并不十分取决于无线电发光。这表明功能强大的FRII无线电源中的喷气性能不取决于积聚模式和积聚磁盘的结构，如果射流发射过程是由于超级质量黑洞的旋转能量提取的。基于各种AGN组件的变化时间尺度，腿和HEG相之间反复过渡的替代可能性是不受欢迎的。
This seventh paper of the MUse RAdio Loud Emission lines Snapshot (MURALES) project presents the results of the observations obtained with the VLT/MUSE integral field spectrograph of 3C radio sources and discusses the optical spectral properties of the nuclei of 26 objects with 0.3<z<0.82 (median redshift 0.51). At these redshifts the H$α$ and [NII] emission lines are not covered by optical spectra and alternative diagnostic diagrams are needed to separate the different spectroscopic sub-classes. We derive a robust spectroscopic classification into high and low excitation galaxies (HEGs and LEGs) by only using ratios of emission lines in the rest frame UV and blue portion of the spectra. A key result is that FRII/LEGs are found also at the highest level of radio power (up to L$_{178} \sim 2\times 10^{35}$ erg/s/Hz), among the most luminous radio sources in the Universe. Furthermore, their fraction within the FRII RGs population does not strongly depend on radio luminosity. This suggests that the jet properties in powerful FRII radio sources do not depend on the accretion mode and on the structure of the accretion disk as expected if the jet launching process is due to the extraction of the rotational energy of the supermassive black hole. The alternative possibility of recurrent transitions between a LEG and a HEG phase is disfavored based on the variation timescales of the various AGN components.
