摘要
Ｈｅｌｏｕ将双星系中的自旋方向的统计研究方法用到星系形成过程中，发现旋涡星系的自旋是反相关的，由此联想到在由星系并合过程中自旋对轨道倾角的依赖性。将Ａａｒｓｅｔｈ的标准Ｎ体模拟程序加上动力摩擦，形成一个研究星系并合的Ｎ体模拟程序，用来研究小星系群中星系的自旋和轨道倾角的依赖性．结果表明，在小星系群中，的确存在着类似在涡星系中的自旋和轨道倾角的反相关性．
Statistics of spin orientation in binary galaxies was used by Helou in a study of the process of galaxy formation, who found that the spins of spiral galaxies in binary systems were anticorrelated, so suggesting a dependence of the inclination on the spin in galaxy mergers. We study this dependence for small groups of gaJaxies. An N-body code is de veloped which uses an inclination depeadent dynamical friction law in mergers. It is found that the anticorrelation does exist for small groups of galaxies.
基金
国家自然科学基金
中国科学院天文口资助
