In this work, we investigated the X-ray emission for a sample of young radio AGNs by combining their data from Chandra/XMM-Newton and at other wavebands. We find strong correlations between the X-ray luminosity LX in 2−10 keV and the radio luminosities LR at 5 GHz for VLBI radio-core, VLA radio-core and FIRST component, indicating that both pcand kpc-scale radio emission strongly correlate with X-ray emission in these sources. We find approximately linear dependence of radio on X-ray luminosity in the sources with radiative efficient accretion flows (i.e., the Eddington ratio Redd & 10 ) with b ∼ 1 (LR ∝ L b X) and ξRX ∼ 1 in fundamental plane using VLBI data, where the dependence is consistent with the re-analysed result on the previous study in Fan & Bai (2016) at Redd & 10 , however is significantly deviated from the theoretical prediction of accretion flow as the origin of X-ray emission. In contrast to radio-quiet quasars, there is no significant correlation between Γ and Eddington ratio. Our results seem to indicate that the X-ray emission of high-accreting young radio AGNs may be from jet. We constructed the SEDs for 18 sources (most are in radiative efficient accretion) including 9 galaxies and 9 quasars with high-quality X-ray data, and find that the X-ray emission of most quasars is more luminous than that of normal radio-quiet quasars. This is clearly seen from the quasar composite SED, of which the X-ray emission is apparently higher than that of radio-quiet quasars, likely supporting the jet-related X-ray emission in young radio AGNs. The scenario that the X-ray emission is from self-synchrotron Compton (SSC) is discussed.

中文翻译：

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年轻的放射性活跃星系核中的 X 射线发射

在这项工作中，我们通过结合来自 Chandra/XMM-Newton 和其他波段的数据，研究了年轻射电 AGN 样本的 X 射线发射。我们发现 VLBI 射电核心、VLA 射电核心和 FIRST 分量的 2-10 keV X 射线光度 LX 与 5 GHz 射电光度 LR 之间存在强相关性，表明 pc 和 kpc 尺度射电发射与这些源中的 X 射线发射。我们发现射电对 X 射线光度的近似线性相关性在具有辐射有效吸积流（即爱丁顿比率 Redd & 10 ）的源中，使用 VLBI 在基本平面中 b ∼ 1 (LR ∝ L b X) 和 ξRX ∼ 1数据，其中依赖性与 Redd & 10 的 Fan & Bai (2016) 先前研究的重新分析结果一致，然而，它大大偏离了吸积流作为 X 射线发射起源的理论预测。与射电安静的类星体相比，Γ 和爱丁顿比之间没有显着的相关性。我们的结果似乎表明，高吸积的年轻射电 AGN 的 X 射线发射可能来自喷流。我们用高质量的X射线数据为包括9个星系和9个类星体在内的18个源（大部分是辐射有效吸积）构建了SED，发现大多数类星体的X射线发射比普通射电发射的X射线更亮。安静的类星体。这从类星体复合 SED 中可以清楚地看出，其 X 射线发射明显高于射电安静类星体的 X 射线发射，这可能支持年轻射电 AGN 中与喷流相关的 X 射线发射。