Galaxy groups from SDSS DR7 and ALFALFA

Using the group crossing time t_c_ as an age indicator for galaxy groups, we have investigated the correlation between t_c_ and the group spiral fraction, as well as between...

本研究以星系群（galaxy groups）的群穿越时间$t_c_$作为年龄指示器，对$t_c_$与星系群旋涡星系占比之间的相关性，以及……之间的相关性展开了探究。