The Centaurus-Pavo Supercluster

Extract

In the southern sky, the Centaurus and Pavo “superclusters”, although lying on opposite sides of the Milky Way, show similar redshifts (V ≃ 4500 km s⁻¹). This author and others have suggested earlier that they may really be portions of a single entity. To investigate this further a redshift survey has been undertaken of the Triangulum Australe-Ara region (15^h30^m < α < 18^h45^m, −70° < 6 < −50°) that lies between Centaurus and Pavo, but at very low galactic latitude on the Pavo side of the Milky Way. 75 published redshifts have been supplemented by 56 new redshifts. Selection has favoured E-SO galaxies from the ESO catalogue but the varying extinction has made control difficult.