We present a study of the X-ray emission for a sample of radio-detected quasars constructed from the cross-matches between SDSS, FIRST catalogs and XMM-Newton archives. A sample of radio-quiet SDSS quasars without FIRST radio detection is also assembled for comparison. We construct the optical and X-ray composite spectra normalized at rest frame 4215 (or 2200 ) for both radio-loud quasars (RLQs) and radio-quiet quasars (RQQs) at z ≤ 3.2, with matched X-ray completeness of 19%, redshift and optical luminosity. While the optical composite spectrum of RLQs is similar to that of RQQs, we find that RLQs have a higher X-ray composite spectrum than RQQs, consistent with previous studies in the literature. By dividing the radio-detected quasars into radio loudness bins, we find the X-ray composite spectra are generally higher with increasing radio loudness. Moreover, a significant correlation is found between the optical-to-X-ray spectral index and radio loudness, and there is a unified multi-correlation between the radio and X-ray luminosities and radio loudness in radio-detected quasars. These results could be possibly explained with the corona-jet model, in which the corona and jet are directly related.

我们介绍了根据SDSS，FIRST目录和XMM-Newton档案之间的交叉匹配构建的无线电探测类星体样本的X射线发射研究。还组装了没有FIRST无线电检测功能的无无线电SDSS类星体样本，以进行比较。我们构造在z静止帧4215（或2200）处归一化的光学和X射线复合光谱，用于z处的无线电大声类星体（RLQs）和无线电静性类星体（RQQs）≤3.2，具有匹配的X射线完整度19％，红移和光学发光度。尽管RLQ的光学复合光谱与RQQ相似，但我们发现RLQ的X射线复合光谱比RQQ更高，这与文献中先前的研究一致。通过将无线电探测到的类星体划分为无线电响度区间，我们发现随着无线电响度的提高，X射线复合频谱通常更高。此外，在光学到X射线光谱指数和无线电响度之间发现了显着的相关性，并且在无线电探测类星体中，无线电和X射线亮度和无线电响度之间存在统一的多重相关性。这些结果可能可以用电晕喷射模型解释，其中电晕和喷射直接相关。