论文标题
LSST调查的重力镜头类星体的模拟目录
A Mock Catalog of Gravitationally Lensed Quasars for the LSST Survey
论文作者
论文摘要
我们在$ z_ \ text {qso} <7.5 $上介绍了重力镜头的类星体的模拟目录，其中包括鲁宾天文台遗产时空的模拟图像（LSST）。我们采用了类星体光度函数的最新测量值来对类星体种群进行建模，并使用Cosmodc2模拟星系目录对偏转星系进行建模，从而成功地再现了观察到的星系速度分散效应的功能高达$ z_d \ sim1.5 $。对于Einstein Radius $θ_E> 0 \ FARCS07 $和Quasar绝对幅度$ M_ {i} <-20 $，模拟目录非常完整。我们估计在当前成像调查中可发现$ \ sim10^3 $镜头的类星体，而LSST将将此数字增加到$ \ sim2.4 \ times10^3 $。大多数镜头类星体具有图像分离$δθ> 0 \ farcs5 $，至少可以在LSST图像中略微解决，看到$ \ sim0 \ farcs7 $。 LSST中将发现$ \ sim200 $ QUADRUPLY 3镜头。在所有可发现的镜头类星体中，四镜的比例约为$ \ sim10 \％-15 \％$，而随着调查深度，这一比例降低了。该模拟目录在镜头分离和类星体与转化器的通量比方面显示了镜头类星体的观测特征的巨大多样性。我们讨论了在LSST时代完全搜索镜头类星体的可能策略。
We present a mock catalog of gravitationally lensed quasars at $z_\text{qso}<7.5$ with simulated images for the Rubin Observatory Legacy Survey of Space and Time (LSST). We adopt recent measurements of quasar luminosity functions to model the quasar population, and use the CosmoDC2 mock galaxy catalog to model the deflector galaxies, which successfully reproduces the observed galaxy velocity dispersion functions up to $z_d\sim1.5$. The mock catalog is highly complete for lensed quasars with Einstein radius $θ_E>0\farcs07$ and quasar absolute magnitude $M_{i}<-20$. We estimate that there are $\sim10^3$ lensed quasars discoverable in current imaging surveys, and LSST will increase this number to $\sim2.4\times10^3$. Most of the lensed quasars have image separation $Δθ>0\farcs5$, which will at least be marginally resolved in LSST images with seeing of $\sim0\farcs7$. There will be $\sim200$ quadruply-lensed quasars discoverable in the LSST. The fraction of quad lenses among all discoverable lensed quasars is about $\sim10\%-15\%$, and this fraction decreases with survey depth. This mock catalog shows a large diversity in the observational features of lensed quasars, in terms of lensing separation and quasar-to-deflector flux ratio. We discuss possible strategies for a complete search of lensed quasars in the LSST era.
