公转运动对星系自转曲线的影响

THE REVOLVING EFFECT ON THE ROTATION CURVE OF SRIRAL GALAXY

本文指出了一种新的、公转产生的运动学效应对星系自转曲线的影响,讨论了公转角速度与自转曲线变化间的关系。利用最小二乘方拟合,对44个Sb和Sc星系的自转曲线,计算了极端情况下的公转周期及潮汐力与自引力之比,最后,建议测量星系盘上所有方向上的自转曲线,以检测公转的运动学效应。

A new kind of kinematic effect on the rotation curve of spiral galaxy ispointed out. The relation between revolving angular velocity and the variationof rotation curve is discussed. The 44 rotation curves of Sb and Sc galaxies areexpressed by means of a linear least square fit, from which the period of revolvingand the ratio of tidal force to self-gravitating force are estimated for every galaxyin extreme cases At last, to measure the rotation curve in all direction of galacticdisk is suggested to examine the kinematic effects of revolving.