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03 October 2022
  » arxiv » astro-ph/0502217

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Cosmological Structures behind the Milky Way
Renee C. Kraan-Korteweg ;
Date 10 Feb 2005
Subject astro-ph
AffiliationUniv. of Guanajuato, and Univ. of Cape Town
AbstractThis paper provides an update to the review on extragalactic large-scale structures uncovered in the Zone of Avoidance (ZOA) by Kraan-Korteweg & Lahav 2000, in particular in the Great Attractor region. Emphasis is given to the penetration of the ZOA with the in 2003 released NIR 2MASX Catalog. The distribution is little affected by the foreground dust. Galaxies can be identified to extinction levels of over A(B) < 10m except in the wider Galactic Bulge region (see Fig. 9) where star density is a strong delimiting factor. The shape of the NIR-ZOA is quite asymmetric due to Galactic features such as spiral arms and the Bulge, something that should not be ignored when using NIR samples for studies such as dipole determinations. Results are presented from the deep blind HI ZOA survey performed with the Multibeam Receiver at the Parkes telescope (v < 12700km/s). The distribution of the roughly one thousand discovered spiral galaxies in the optically and NIR impenetratable part of the ZOA clearly depict the prominence of the Norma Supercluster. With the optically identified galaxies in the ZOA, a picture emerges that bears a striking resemblance to the Coma cluster in the Great Wall: the rich Norma cluster (ACO 3627) lies within a great-wall like structure that can be traced at the redshift range of the cluster over 90dg on the sky, with two foreground filaments - reminiscent of the legs in the famous stick man - that merge in an overdensity at slightly lower redshifts around the radio galaxy PKS 1343-601 (see Figs. 14 & 16). (abridged)
Source arXiv, astro-ph/0502217
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