Due to the finite size of the disk and the temperature fluctuations producing the variability, microlensing changes the actual time delays between images of strongly lensed active galactic nuclei on the ∼day(s) light-crossing timescale of the emission region. This microlensing-induced time delay depends on the disk model, primarily the disk size R disk , which has been found to be larger than predicted by the thin-disk model. In this work, we propose that light curves measured in different bands will give different time delays because R disk is a function of wavelength; by measuring the time-delay differences between bands, one can (1) directly verify such an new effect, and (2) test the thin-disk model of quasars. For the second goal, our method can avoid the potential inconsistency between multi-band light curves that may bias the results by continuum reverberation mapping. We conduct a simulation based on a PG 1115+080-like lensed quasar, ca...

中文翻译：

---

彩色微透镜延时

由于盘的大小有限，并且温度波动会引起变化，因此微透镜会在发射区域的约•天的光穿越时间尺度上改变强透镜活动银河核图像之间的实际时间延迟。这种由微透镜引起的时间延迟取决于磁盘模型，主要取决于磁盘大小R disk，已发现它大于薄磁盘模型所预测的大小。在这项工作中，由于R盘是波长的函数，我们建议在不同频带上测量的光曲线将给出不同的时间延迟。通过测量频段之间的时延差异，可以（1）直接验证这种新效果，（2）测试类星体的薄盘模型。对于第二个目标，我们的方法可以避免多频带光曲线之间可能存在的不一致性，该不一致性可能会因连续混响映射而使结果产生偏差。我们基于类似PG 1115 + 080的带透镜类星体进行了模拟，可...