LSST巡天中的星系统计研究
The Statistical Study of Galaxy Evolution with Legacy Survey of Space and Time
The 8.4m Vera Rubin Observatory Legacy Survey of Space and Time (LSST) is a ground-based survey that will cover ~18,000 square degree of southern sky with a depth of r~27.5 magnitude, starting at ~2025. The survey is photometric-only, with multiple bands from the ultraviolet to the near-infrared. With the largest product of the mirror area and the field-of-view size among the surveys to-date, LSST will detect around 20 billion galaxies in its full survey of 10 years. The large mirror will enable us to do galaxy morphology classifications in higher redshifts. The large and continuous sky coverage, on the other hand, will empower us to map galaxy clusters and study the environmental effects on galaxies. We can also measure the properties of dark matter halos with the weak gravitational lensing technique and study the galaxy-halo connection. Such a large galaxy catalog will enable us to find rare objects and weak statistical signals, both requiring large areas of the sky. In this talk, I will introduce the general information of LSST survey, its science collaborations, and its potential on the static sky, especially in the statistical study of galaxies. In synergy with other surveys with different wavelength and especially the ones with spectroscopic observation, LSST will provide a new window into galaxy formation and cosmology.
