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首页> 外文期刊>The Astrophysical Journal. Letters >Multi-epoch observations of the red wing excess in the spectrum of 3C 279
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Multi-epoch observations of the red wing excess in the spectrum of 3C 279

机译：3C 279频谱中红翼过量的多纪元观察

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摘要

It has been previously determined that there is a highly significant correlation between the spectral index from 10 GHz to 1350 ? and the amount of excess luminosity in the red wing of quasar C IV λ1549 broad emission lines (BELs). Ostensibly, the prominence of the red excess is associated with the radio jet emission mechanism and is most pronounced for lines of sight close to the jet axis. Studying the scant significant differences in the UV spectra of radio-loud and radio-quiet quasars might provide vital clues to the origin of the unknown process that creates powerful relativistic jets that appear in only about 10% of quasars. In this study, the phenomenon is explored with multi-epoch observations of the Mg II λ2798 broad line in 3C 279 which has one of the largest known red wing excesses in a quasar spectrum. The amount of excess that is detected appears to be independent of all directly observed optical continuum, radio, or submillimeter properties (fluxes or polarizations). The only trend that occurs in this sparse data is: the stronger the BEL, the larger the fraction of flux that resides in the red wing. It is concluded that more monitoring is needed and spectropolarimetry with a large telescope is essential during low states to understand more.
机译：先前已经确定，光谱指数从10 GHz到1350之间存在非常显着的相关性？和Quasar C IVλ1549宽发射线（BEL）红翼的过量亮度的量。表面上，红色过量的突出与无线电射流发射机制相关联，并且最为明显地靠近喷射轴的视线。学习无线电和无线电静音Quasars的紫外线谱的微观差异可能为未知过程的起源提供重要的线索，这些过程产生强大的相对论射流，仅以约10％的额外的Quasars出现。在这项研究中，利用3C 279中的Mg IIλ2798宽线的多纪元观察探索该现象，其在准频谱中具有最大已知的红色翼过多。检测到的过量量似乎与所有直接观察到的光学连续素，无线电或亚倍数计属性（助熔剂或偏振）无关。在这种稀疏数据中发生的唯一趋势是：BEL越强，持续在红色翼的磁通量越大。得出结论，需要更多的监测，并且具有大望远镜的光波罗米仪在低状态期间是必不可少的，以了解更多。

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