Large-scale Structures behind the Southern Milky Way from Observations of Partially Obscured Galaxies

We report here on extragalactic large-scale structures uncovered by a deep optical survey for galaxies behind the southern Milky Way. Systematic visual inspection of the ESO/SRC survey revealed over 10000 previously unknown galaxies in the region 265° ≲ l ≲ 340°, ∣b∣ ≲ 10°. With subsequently obtained redshifts of more than 10% of these galaxies, new structures across the Milky Way are unveiled, such as a filament at ∼2500 km s^-1 connecting to the Hydra and Antlia clusters, a shallow extended superduster in Vela (∼6000 km s^-1), and a nearby (4882 km s^-1), very massive (M ∼ 2 - 5 × 10¹⁵ M _⊙), rich Coma-like cluster which seems to constitute the previously unidentified centre of the Great Attractor.