演講資訊

摘要：

Ring galaxies, a peculiar class of galaxies, contain various ring-like structures with or without clumps, nuclei, companions, or spokes. For example, the famous Cartwheel galaxy, first discovered by Zwicky (1941), shows an outer ring, an inner ring, a nucleus, and spokes (Theys & Spiegel 1976; Fosbury & Hawarden 1977; Higdon 1995). To explain the formation of ring galaxies, Lynds & Toomre (1976) proposed the collision scenario. In this talk, I will introduce the standard classifications of ring galaxies and show our simulations to investigate the formation of collisional ring galaxies.