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02 July 2022
 
  » arxiv » astro-ph/0006126

 Article overview


Large-Scale Structures behind the Southern Milky Way in the Great Attractor Region
Patrick A. Woudt ; Renee C. Kraan-Korteweg ;
Date 9 Jun 2000
Subject astro-ph
AffiliationUniversity of Cape Town), Renee C. Kraan-Korteweg (University of Guanajuato
AbstractA deep optical galaxy search behind the southern Milky Way and a subsequent redshift survey of the identified obscured galaxies traces clusters and superclusters into the deepest layers of Galactic foreground extinction (A_B <= 3^m - 5^m). In the Great Attractor region, we have identified a low-mass cluster (the Centaurus-Crux cluster) at (l, b, v, sigma) = (305.5deg, +5.5deg, 6214 km/s, 472 km/s) and found that ACO 3627 (the Norma cluster) at (l, b, v, sigma) = (325.3deg, -7.2deg, 4844 km/s, 848 km/s) is the most massive cluster in the Great Attractor region known to date. It is comparable in virial mass, richness and size to the well-known but more distant Coma cluster. The Norma cluster most likely marks the bottom of the potential well of the Great Attractor. It is located at the intersection of two main large-scale structures, the Centaurus Wall and the Norma supercluster. The flow field observed around the Great Attractor probably is caused by the confluence of these two massive structures.
Source arXiv, astro-ph/0006126
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