论文标题
具有宽光学/紫外线发射线的尘埃刺激星系的X射线特性
X-ray properties of dust-obscured galaxies with broad optical/UV emission lines
论文作者
论文摘要
具有极端红外亮度的尘埃刺激的星系（狗）可能代表星系共同进化和超大质量黑洞的关键阶段。我们以$ 0.3 \ Lessim Z \ Lessim1.0 $的价格选择了12只狗，其中包括宽敞的Mg II或H $β$发射线，并使用Chandra使用快照观测值（$ \ sim3〜 \ Mathrm {ks} $）调查其X射线属性（$ \ sim3〜 \ Mathrm {ks} $）。通过假设由于广泛区域的病毒运动而扩大了宽线，我们发现我们的来源通常具有较高的爱丁顿比率（$λ_\ mathrm {edd} $）。我们的来源通常具有中等的内在X射线光度（$ L_ \ Mathrm {X} \ Lessim10^{45}〜\ Mathrm {Erg〜S^{ - 1}} $），与其他狗相似，但更遮盖了。他们还呈现了中等的流出和强烈的星光。基于这些发现，我们得出结论，与其他狗相比，高$λ_\ Mathrm {Edd} $狗更接近宿主 - 果胶和黑洞生长的峰值，而AGN的反馈并未扫除其气体储层。但是，至少对于某些来源，我们不能完全排除宽线被外流扩展的可能性。我们研究了$ l_ \ mathrm {x} $，agn rest-frame $ 6〜 \ mathrm {μm} $单色光度和AGN辐射光度的光度，发现关系与预期的关系一致。
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$β$ 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 ($λ_\mathrm{Edd}$). 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-$λ_\mathrm{Edd}$ 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 $6~\mathrm{μm}$ monochromatic luminosity, and AGN bolometric luminosity, and find the relations are consistent with the expected ones.
