近邻星系中分子气体的分布：通过CARMA-EDGE巡天理解星系的演化
Mapping Molecular Gas in Galaxies: Insights into Galaxy Evolution from the CARMA-EDGE Survey
The evolution of galaxies is fundamentally related to the rate and efficiency of star formation activity. Since star formation is active in cold molecular phase of the interstellar medium, it is essential to identify the physical processes that govern the molecular gas contents of galaxies and the rate at which gas is converted into stars. However, our conceptional understanding has been hampered by the difficulty of connecting the global properties with the spatially resolved results. Therefore, mappings of a large sample of galaxies are significant in studying galaxy evolution. The CARMA-EDGE survey, constituting the largest interferometric CO survey of galaxies in the nearby universe, provides a unique opportunity of investigating the role of molecular gas in galaxy evolution. In this talk, I will introduce the survey, the background, the motivation, the sample, and the data characteristics. I will address outstanding topics regarding gas and its role in star formation and galaxy evolution, by introducing some interesting papers. In particular, the combination of spatially resolved CO and optical observations provides good opportunity in studying the relation between properties of molecular gas and some local conditions, e.g., stellar mass surface density, star formation rate surface density, dynamical equilibrium pressure, and disk instability. Similar works can be considered for a larger and unbiased sample. The CSST optical survey and joint-up CO observations will expand our knowledge in galaxy evolution.
