引力透镜类星体SDSS J133907.23+131038.6的X射线连续谱发射区远小于吸积盘
The X-Ray Continuum Emission Region in the Lensed Quasar SDSS J133907.23+131038.6 is Much Smaller than the Accretion Disk
AI总结：
通过分析引力透镜类星体SDSS J133907.23+131038.6的光学监测数据与X射线观测的微引力透镜变异性，测得其X射线连续谱发射区远小于吸积盘，与最内稳定圆轨道半径一致，还检测到高显著性红移Fe Kα线。
AI中文摘要：
我们对双像引力透镜类星体SDSS J133907.23+131038.6的15个光学监测季节数据和4个新X射线观测历元的微引力透镜变异性进行分析，以对该系统X射线和光学连续谱发射区的大小与结构施加经验约束。采用贝叶斯蒙特卡洛方法，结合60°倾角假设，分析地面光学光变曲线，在193 nm（r波段静止帧中心）处约束远紫外源的半光半径为log(r₁/₂,FUV/cm)=15.78⁺⁰.²⁶₋₀.²⁸，该大小对应质量为4.0×10⁸ M☉的黑洞的约100个r_g。我们测得全波段（0.2-8.0 keV）X射线连续谱发射区的半光半径为log(r₁/₂,X_full/cm)=14.32⁺⁰.²³₋₀.³¹，该测量结果与史瓦西度规下最内稳定圆轨道（ISCO）的半径一致。在图像A的堆叠光谱中，检测到由微引力透镜导致的红移Fe Kα线，在5.9 keV和8.9 keV处的显著性大于99%。
英文摘要：
We analyze microlensing variability in 15 seasons of optical monitoring data and 4 epochs of new X-ray observations of the doubly-imaged gravitationally lensed quasar SDSS J133907.23+131038.6 to place empirical constraints on the size and structure of that system's X-ray and optical continuum emission regions. Employing a Bayesian Monte Carlo method, we analyzed ground-based optical light curves to constrain the half-light radius of the far-UV source $\log(r_{\rm 1/2, FUV}/{\rm cm})=15.78^{+0.26}_{-0.28}$ at 193 nm, the rest-frame center of the {\it r}-band, assuming a $60^\circ$ inclination angle. This size corresponds to $\sim100\,{\it r}_{\rm g}$ for a $4.0 \times 10^{8} \: {\rm M_{\odot}}$ black hole. We measured the half-light radius of the full band ($0.2-8.0 \: {\rm keV}$) X-ray continuum emission region $\log(r_{\rm 1/2, X_{full}}/{\rm cm})=14.32^{+0.23}_{-0.31}$, a size measurement that is consistent with the radius of the innermost stable circular orbit (ISCO) in the Schwarzschild metric.Two shifted Fe K$α$ lines caused by microlensing are detected in the stacked spectrum of image A at 5.9 and 8.9~keV at $>99\%$ significance.
