星系最亮團星系,並且可能是靠著吸積鄰近的星系使他的尺寸得以增長。 Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. A catalog of rich clusters of galaxies (PDF). Astrophysical
15, 2012]. (原始内容存档于2019-12-08). Abell, George O.; Corwin, Harold G., Jr.; Olowin, Ronald P. A catalog of rich clusters of galaxies (PDF). Astrophysical