论文标题
XMM-NEWTON和NUSTAR观察的光学静态类星体
XMM-Newton and NuSTAR Observations of an Optically Quiescent Quasar
论文作者
论文摘要
光学上静止的类星体（OQQ）代表具有星系样光学连续图的最近系统化的红外光线活性银核（AGN）。它们可能代表了AGN生命周期中有趣的简短阶段，例如尽管其性质尚不清楚，但在高覆盖的因子介质中被茧形成了最近的触发。在这里，我们介绍了OQQ的第一个目标同时X射线观测值，即我们先前确定的原型，SDSS J075139.06+402811.2 at $ z $ = 0.587。用XMM-Newton和Nustar在0.5-16 KEV上显着检测到源，明确确认了当前积聚活性的存在。光谱建模产生固有的光度$ l _ {\ rm 2-10 kev} $ $ \ $ \ $ \ $ 4.4 $ \ times $ 10 $^{43} $ erg s $^{ - 1} $，在AGN策略范围内，但与其基础电源相对不足。它被轻轻遮盖，带有log $ n _ {\ rm h} $ [cm $^{ - 2} $] $ \ $ \ $ 22。
Optically quiescent quasars (OQQs) represent a recently systematised class of infrared-luminous active galactic nuclei (AGN) which have galaxy-like optical continua. They may represent an interesting, brief phase in the AGN life cycle, e.g. either cocooned within high-covering-factor media or indicative of recent triggering, though their nature remains unclear. Here, we present the first targeted simultaneous X-ray observations of an OQQ, our previously identified prototype, SDSS J075139.06+402811.2 at $z$=0.587. The source is significantly detected over 0.5-16 keV with XMM-Newton and NuSTAR, unambiguously confirming the presence of current accretion activity. Spectral modelling yields an intrinsic luminosity $L_{\rm 2-10 keV}$ $\approx$4.4$ \times$10$^{43}$ erg s$^{-1}$, well within the AGN regime, but underluminous relative to its infrared power. It is lightly obscured, with log $N_{\rm H}$ [cm$^{-2}$] $\approx$22.
