Near-infrared and Optical Continuum Emission Region Size Measurements in the Gravitationally lensed Quasars Q0957+561 and SBS0909+532
Near-infrared and Optical Continuum Emission Region Size Measurements in the Gravitationally lensed Quasars Q0957+561 and SBS0909+532
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DOI：
10.3847/1538-4357/abc25d
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发表时间：
2020-12
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影响因子：
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通讯作者：
M. Cornachione;C. Morgan;Hayden R. Burger;V. Shalyapin;L. Goicoechea;F. Vrba;S. Dahm;T. Tilleman
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文献类型：
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作者：
M. Cornachione;C. Morgan;Hayden R. Burger;V. Shalyapin;L. Goicoechea;F. Vrba;S. Dahm;T. Tilleman
本文对引力透镜类星体Q 0957 +561和SBS 0909 +532在g波段、r波段和H波段三个波段的光变曲线进行了微透镜分析。这两个系统显示突出的微透镜功能，我们分析使用我们的贝叶斯蒙特卡罗技术来约束类星体连续发射区的大小在每个波段。我们报告的大小为半光半径缩放到60°倾角。对于Q 0957 +561，我们分别在g-、r-和H-波段测量、和。对于SBS 0909 +532，我们分别在g-、r-和H-波段测量、和。通过在类星体静止坐标系紫外到光学的三个波段上的尺寸测量，我们可以对吸积盘尺寸随波长的变化进行限制。在这两个系统的联合分析中，我们发现一个斜率比薄盘理论预测的要浅，这与多时期微透镜研究的其他约束一致。
We present a microlensing analysis of updated light curves in three filters, the 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° inclination angle. For Q0957+561 we measure , , and in g-, r-, and H-band, respectively. For SBS0909+532 we measure , , and in the 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, . In a joint analysis of both systems we find a slope shallower than that predicted by thin disk theory, , consistent with other constraints from multi-epoch microlensing studies.