CAS Key Laboratory of Space Astronomy and Technology, National Astronomical Observatories, A20 Datun Road, Chaoyang District, Beijing 100012, People's Republic of China.
Rep Prog Phys. 2018 Jun;81(6):066901. doi: 10.1088/1361-6633/aab1bd. Epub 2018 Feb 23.
The Large Synoptic Survey Telescope (LSST) is a high étendue imaging facility that is being constructed atop Cerro Pachón in northern Chile. It is scheduled to begin science operations in 2022. With an [Formula: see text] ([Formula: see text] effective) aperture, a novel three-mirror design achieving a seeing-limited [Formula: see text] field of view, and a 3.2 gigapixel camera, the LSST has the deep-wide-fast imaging capability necessary to carry out an [Formula: see text] survey in six passbands (ugrizy) to a coadded depth of [Formula: see text] over 10 years using [Formula: see text] of its observational time. The remaining [Formula: see text] of the time will be devoted to considerably deeper and faster time-domain observations and smaller surveys. In total, each patch of the sky in the main survey will receive 800 visits allocated across the six passbands with [Formula: see text] exposure visits. The huge volume of high-quality LSST data will provide a wide range of science opportunities and, in particular, open a new era of precision cosmology with unprecedented statistical power and tight control of systematic errors. In this review, we give a brief account of the LSST cosmology program with an emphasis on dark energy investigations. The LSST will address dark energy physics and cosmology in general by exploiting diverse precision probes including large-scale structure, weak lensing, type Ia supernovae, galaxy clusters, and strong lensing. Combined with the cosmic microwave background data, these probes form interlocking tests on the cosmological model and the nature of dark energy in the presence of various systematics. The LSST data products will be made available to the US and Chilean scientific communities and to international partners with no proprietary period. Close collaborations with contemporaneous imaging and spectroscopy surveys observing at a variety of wavelengths, resolutions, depths, and timescales will be a vital part of the LSST science program, which will not only enhance specific studies but, more importantly, also allow a more complete understanding of the Universe through different windows.
大型综合巡天望远镜（LSST）是一座高孔径成像设施，位于智利北部的帕钦峰上。它计划于 2022 年开始科学运作。该望远镜具有[Formula: see text]（[Formula: see text]有效）的孔径、一种新颖的三镜设计，实现了视宁度限制的[Formula: see text]视场、以及一个 3.2 亿像素的相机，具有进行[Formula: see text]巡天的深广快成像能力，使用其观测时间的[Formula: see text]，在六个滤光波段（ugrizy）叠加到[Formula: see text]的深度，观测时间为 10 年。其余的[Formula: see text]时间将用于更深入和更快的时域观测和较小的巡天。总的来说，主巡天中的每一个天空区域将在六个波段中分配 800 次观测，每次观测曝光[Formula: see text]次。大量高质量的 LSST 数据将提供广泛的科学机会，特别是通过前所未有的统计能力和对系统误差的严格控制，开启精确宇宙学的新时代。在这篇综述中，我们简要介绍了 LSST 的宇宙学计划，重点介绍了暗能量研究。LSST 将通过利用各种精密探针，包括大尺度结构、弱引力透镜、Ia 型超新星、星系团和强引力透镜，来解决暗能量物理学和一般宇宙学问题。这些探针与宇宙微波背景数据相结合，在存在各种系统误差的情况下，对宇宙学模型和暗能量的性质形成了相互关联的测试。LSST 的数据产品将提供给美国和智利科学界以及没有专有期的国际合作伙伴。与同时进行的各种波长、分辨率、深度和时间尺度的成像和光谱巡天密切合作，将是 LSST 科学计划的一个重要组成部分，这不仅将增强特定的研究，而且更重要的是，通过不同的窗口，对宇宙有更全面的了解。
