Collaborative Research: Accurate cosmology with strong gravitational lens time delays

这个合作项目的目标是改进目前对宇宙量的测量，特别是哈勃常数和暗能量成分，利用作用于类星体的强引力透镜的时间延迟测量。这包括对已经获得的数据的分析，以及预计发现的大约50个新透镜。引力时间延迟不仅独立于其他方法，而且是一种非常经济有效的探测方法，在8-10米望远镜上只需几个小时就可以对透镜进行建模，随后在1m级望远镜上进行监测。更广泛的影响包括培养研究生和博士后研究人员。在K-12阶段，Treu博士与圣巴巴拉自然历史博物馆（SBMNH）和拉斯康布雷斯天文台全球望远镜网络合作，组织公开讲座，并在加州大学运营的塞奇威克自然保护区建立天文学课程。同样，法斯纳赫特博士为戴维斯校区的高中生开设了一个为期一个月的课程，作为加州大学COSMOS项目的一部分。

The goal of this collaborative project is to improve the current measurement of cosmological quantities, in particular the Hubble constant and the Dark Energy component, using time delay measurements from strong gravitational lenses acting upon quasars. This includes analysis of already taken data, as well as the anticipated discovery of approximately 50 new lenses. Gravitational time delays are not only independent of other methods but are also a very cost effective probe, requiring just a few hours on an 8-10m telescope for modeling the lens, and subsequent monitoring on 1m class telescopes.Broader impacts of the work include training of graduate students and postdoctoral researchers. At the K-12 level, Dr. Treu collaborates with the Santa Barbara Museum of Natural history (SBMNH) and Las Cumbres Observatories GlobalTelescope Network to organize public lectures, and establish an astronomy curriculum at the UC-operated Sedgwick Natural Reserve. Similarly, Dr. Fassnacht has developed a month-long course for high-school students on the Davis campus as part of the UC COSMOS program.