论文标题
年轻无线电AGN中的X射线排放
The X-ray emission in young radio AGNs
论文作者
论文摘要
在这项工作中，我们通过合并了Chandra/XMM-Newton和其他波段的数据来研究年轻无线电AGN样品的X射线发射。 We find strong correlations between the X-ray luminosity $L_{\rm X}$ in 2$-$10 keV and the radio luminosities $L_{\rm R}$ at 5 GHz for VLBI radio-core, VLA radio-core and FIRST component, indicating that both pc- and kpc-scale radio emission strongly correlate with X-ray emission in these sources.我们发现无线电对X射线光度的近似线性依赖性具有辐射有效的积聚流的来源（即，Eddington比率$ r _ {\ rm EDD} \ gtrsim 10^{ - 3} $带有b $ \ sim $ 1（ ^{b} $）和$ξ_ {\ rm rx} $ $ \ sim $ \ sim $ \ sim $ \ sim $ 1使用VLBI数据，其中依赖性与先前研究的重新分析结果一致\ cite {2016apj ... 818..185f} at $ r _ $ r _ $ rm _ {作为X射线发射的起源，显着偏离了积聚流的理论预测。与放射定价类星体相反，$γ$和爱丁顿比率之间没有显着相关性。我们的结果似乎表明，高核年轻无线电AGN的X射线发射可能来自JET。我们为18个来源构建了SED（大多数是辐射有效的积聚），其中包括9个星系和9个具有高质量X射线数据的类星体，发现大多数类星体的X射线发射比正常的放射性测量品数量更发明。从类星体复合材料SED中可以清楚地看出这一点，其中X射线发射显然高于无线电定价，这可能支持年轻无线电AGN中与喷射相关的X射线发射。讨论了X射线发射来自自同步康普顿（SSC）的情况。
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 $L_{\rm X}$ in 2$-$10 keV and the radio luminosities $L_{\rm R}$ at 5 GHz for VLBI radio-core, VLA radio-core and FIRST component, indicating that both pc- and 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 $R_{\rm edd} \gtrsim 10^{-3} $) with b $\sim$ 1 ($L_{\rm R}$ $\propto$ $L_{\rm X} ^{b}$) and $ξ_{\rm RX}$ $\sim$ 1 in fundamental plane using VLBI data, where the dependence is consistent with the re-analysed result on the previous study in \cite{2016ApJ...818..185F} at $R_{\rm edd} \gtrsim 10^{-3}$, 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.
