论文标题
重力镜头Q0957+561和SBS0909+532中的近红外和光学连续发射区域大小测量
Near infrared and optical continuum emission region size measurements in the gravitationally lensed quasars Q0957+561 and SBS0909+532
论文作者
论文摘要
我们对三个过滤器的更新光线曲线进行了微透镜分析，$ g $ - band，$ r $ - band和$ h $ - band，用于重力镜头Q0957+561和SBS0909+532。这两个系统都呈现出突出的微透镜特征，我们使用贝叶斯蒙特卡洛技术分析这些特征，以限制每个频段中的类星体连续发射区域的大小。我们报告的尺寸为半光半径，缩放到60度倾斜角。对于Q0957+561，我们测量$ \ log {（r_ {1/2}/\ text {cm}）} = 16.54^{+0.33} _ { - 0.33} $，$ 16.66^ $ 17.37^{+0.49} _ { - 0.40} $ in $ g $ - ，$ r $ - 和$ h $ - band。对于SBS0909+532，我们测量$ \ log {（r_ {1/2}/\ text {cm}）} = 15.83^{+0.33} _ { - 0.33} $，$ 16.21 $ 17.90^{+0.61} _ { - 0.63} $ in $ g $ - ，$ r $ - 和$ h $ - band。将三个频段的尺寸测量跨越了类星体休息框架紫外线到光学，我们可以将约束在具有波长的增生磁盘尺寸的缩放上放置，$ r \proptoλ^{1/β} $。在对这两个系统的联合分析中，我们发现斜率比薄磁盘理论预测的斜率较浅，$β= 0.35^{+0.16} _ { - 0.08} $，与多ePoch微镜研究的其他约束一致。
We present a microlensing analysis of updated light curves in three filters, $g$--band, $r$--band, and $H$--band, for the gravitationally lensed quasars Q0957+561 and SBS0909+532. Both systems display prominent microlensing features which we analyze using our Bayesian Monte Carlo technique to constrain the quasar continuum emission region sizes in each band. We report sizes as half-light radii scaled to a 60 degree inclination angle. For Q0957+561 we measure $\log{(r_{1/2}/\text{cm})} = 16.54^{+0.33}_{-0.33}$, $16.66^{+0.37}_{-0.62}$, and $17.37^{+0.49}_{-0.40}$ in $g$--, $r$--, and $H$--band respectively. For SBS0909+532 we measure $\log{(r_{1/2}/\text{cm})} = 15.83^{+0.33}_{-0.33}$, $16.21^{+0.37}_{-0.62}$, and $17.90^{+0.61}_{-0.63}$ in $g$--, $r$--, and $H$--band respectively. With size measurements in three bands spanning the quasar rest frame ultraviolet to optical, we can place constraints on the scaling of accretion disk size with wavelength, $r\proptoλ^{1/β}$. In a joint analysis of both systems we find a slope shallower than that predicted by thin disk theory, $β= 0.35^{+0.16}_{-0.08}$, consistent with other constraints from multi-epoch microlensing studies.
