The velocity potential analysis shows that there is a massive density perturbation peak (Great Attactor) existing in the region of Hydra-Centaurus.

• 由势流方法(即由本动速度势回推密度扰动场)得到在长蛇一半人马超团附近存在着一个大质量的密度扰动峰,即巨大吸引物(GA),它主导着星系的大尺度本动运动。