标题： 欧几里得微透镜流量比预测 显示英文标题

标题： Microlensing flux ratio predictions for Euclid

摘要： 类星体微透镜流量比被用来揭示大量引力透镜化的类星体样本的透镜性质，比如预期由欧几里得巡天产生的那些。 这可以通过直接使用巡天产品来实现，而无需任何（昂贵的）后续观测或监测。 首先，对于数百个模拟类星体透镜样本，在不同的初始质量函数（IMF）和透镜紧凑物质分布的Sérsic径向分布下，计算理论上的流量比分布。 然后，生成模拟观测数据并与模型进行比较，以恢复底层的真实情况。 确定此类样本流量比性质的最重要因素是在多重像位置处的平滑物质分数的值。 双重透镜的CASTLES类类星体系统是最有希望限制透镜样本的IMF和质量成分的系统。 显示英文摘要

摘要： Quasar microlensing flux ratios are used to unveil properties of the lenses in large collections of lensed quasars, like the ones expected to be produced by the Euclid survey. This is achieved by using the direct survey products, without any (expensive) follow-up observations or monitoring. First, the theoretical flux ratio distribution of samples of hundreds of mock quasar lenses is calculated for different Initial Mass Functions (IMFs) and Sersic radial profiles for the lens compact matter distribution. Then, mock observations are created and compared to the models to recover the underlying one. The most important factor for determining the flux ratio properties of such samples is the value of the smooth matter fraction at the location of the multiple images. Doubly lensed CASTLES-like quasars are the most promising systems to constrain the IMF and the mass components for a sample of lenses.