Star Formation Properties in Barred Galaxies(SFB). III. Statistical Study of Bar-driven Secular Evolution using a sample of nearby barred spirals

摘要

Stellar bars are important internal drivers of secular evolution in diskgalaxies. Using a sample of nearby spiral galaxies with weak and strong bars,we explore the relationships between the star formation feature and stellarbars in galaxies. We find that galaxies with weak bars tend to be coincide withlow concentrical star formation activity, while those with strong bars show alarge scatter in the distribution of star formation activity. We find enhancedstar formation activity in bulges towards stronger bars, although notpredominantly, consistent with previous studies. Our results suggest thatdifferent stages of the secular process and many other factors may contributeto the complexity of the secular evolution. In addition, barred galaxies withintense star formation in bars tend to have active star formation in theirbulges and disks, and bulges have higher star formation densities than bars anddisks, indicating the evolutionary effects of bars. We then derived a possiblecriterion to quantify the different stages of bar-driven physical process,while future work is needed because of the uncertainties.