Dust-obscured galaxies (DOGs) with extreme infrared luminosities may represent a key phase in the co-evolution of galaxies and supermassive black holes. We select 12 DOGs at $0.3\lesssim z\lesssim1.0$ with broad Mg II or H$\beta$ emission lines and investigate their X-ray properties utilizing snapshot observations ($\sim3~\mathrm{ks}$ per source) with Chandra. By assuming that the broad lines are broadened due to virial motions of broad-line regions, we find that our sources generally have high Eddington ratios ($\lambda_\mathrm{Edd}$). Our sources generally have moderate intrinsic X-ray luminosities ($L_\mathrm{X}\lesssim10^{45}~\mathrm{erg~s^{-1}}$), which are similar to those of other DOGs, but are more obscured. They also present moderate outflows and intense starbursts. Based on these findings, we conclude that high-$\lambda_\mathrm{Edd}$ DOGs are closer to the peaks of both host-galaxy and black-hole growth compared to other DOGs, and that AGN feedback has not swept away their reservoirs of gas. However, we cannot fully rule out the possibility that the broad lines are broadened by outflows, at least for some sources. We investigate the relations among $L_\mathrm{X}$, AGN rest-frame $6~\mathrm{\mu m}$ monochromatic luminosity, and AGN bolometric luminosity, and find the relations are consistent with the expected ones.

中文翻译：

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具有宽光/紫外发射线的尘埃遮蔽星系的 X 射线特性

具有极红外光度的尘埃遮蔽星系 (DOG) 可能代表了星系和超大质量黑洞共同演化的关键阶段。我们选择了 12 个 DOG，价格为 $0.3\lesssim z\lesssim1.0$，具有广泛的 Mg II 或 H$\beta$ 发射线，并利用快照观测（每个源 $\sim3~\mathrm{ks}$）研究它们的 X 射线特性与钱德拉。通过假设宽线由于宽线区域的维力运动而加宽，我们发现我们的来源通常具有高爱丁顿比率（$\lambda_\mathrm{Edd}$）。我们的源通常具有中等的内在 X 射线光度（$L_\mathrm{X}\lesssim10^{45}~\mathrm{erg~s^{-1}}$），这与其他 DOG 的相似，但是更加模糊。它们还呈现出适度的外流和强烈的星暴。基于这些发现，我们得出的结论是，与其他 DOG 相比，高 $\lambda_\mathrm{Edd}$ DOG 更接近宿主星系和黑洞增长的峰值，并且 AGN 反馈并没有扫除它们的气体储层。但是，我们不能完全排除外流扩大了宽线的可能性，至少对于某些来源而言。我们研究了 $L_\mathrm{X}$、AGN 静止框架 $6~\mathrm{\mu m}$ 单色光度和 AGN 热光度之间的关系，发现这些关系与预期的一致。