基于SCUSS数据的棒旋星系长期演化研究

星系的形成与演化是天体物理学研究的前沿课题之一，而长期演化是其重要的组成部分，星系的大尺度棒结构又是驱动长期演化的主要内部因素。本项目将对由星系棒所驱动的长期演化过程进行研究。基于最新的u波段巡天数据SCUSS，并结合最新释放的光学SDSS dr9和红外WISE测光数据以及LAMOST和其他地面望远镜（兴隆2.16m、SDSS）的光谱数据，我们将主要进行以下几个方面的研究：1）星系棒结构对星系中恒星形成活动强度及分布的影响，2）不同类别的棒旋星系在其棒性质上的差异，3）星系棒对星系核活动性的影响，4）星系棒对星系化学演化的影响。由此利用星系大样本进行多波段分析和统计研究，我们期望能定性甚至定量的了解由棒结构导致的星系长期演化这一过程产生的根本原因和物理机制，解决目前观测结果中存在的诸多矛盾，为研究星系长期演化提供观测依据和理论解释，从而深入了解当前乃至未来宇宙中星系演化的方向和趋势。

Galaxy secular evolution is the important part of the formation and evolution of galaxies, which is one of most active areas at the forefront of current astrophysics research. Stellar bars are important internal drivers for the secular evolution of disk galaxies. The project will study the secular evolution driven by large-scale galactic bars, based on the latest South Galactic Cap U-band Sky Survey (SCUSS) data, and combined with the latest released optical data from SDSS dr9 and infrared data from WISE, as well as the spectral data from LAMOST and other ground-based telescopes (Xinglong 2.16m, SDSS). We will focus on answering the following research questions: 1) the effect of galactic bars to the intensity and distribution of star formation activities in disks, 2) the difference between stellar bars in different types of galaxies, 3) the effect of galactic bars to galactic nuclei activity, 4) the effect of galactic bars to chemical evolution of galaxies. Thus, using the large sample of barred spiral galaxies and multi-wavelength analysis and statistical research, we look forward to qualitatively or even quantitatively understand the fundamental cause and physical mechanisms of bar-driven secular evolution, resolve the contradictions in current observations, and provide observational evidence and theoretical interpretation for the secular evolution of galaxies, which could promote a good deal of insight into the current state and even the future of galaxies in the Universe.