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Discovery of a Large-scale Wall in the Direction of Abell 22 | | Kevin A. Pimbblet
; Alastair C. Edge
; Warrick J. Couch
; | | Date: |
3 Dec 2004 | | Journal: | Mon.Not.Roy.Astron.Soc. 357 (2005) L45 | | Subject: | astro-ph | | Abstract: | We report on the discovery of a large-scale wall in the direction of Abell 22. Using photometric and spectroscopic data from the Las Campanas Observatory and Anglo-Australian Telescope Rich Cluster Survey, Abell 22 is found to exhibit a highly unusual and striking redshift distribution. We show that Abell 22 exhibits a foreground wall-like structure by examining the galaxy distributions in both redshift space and on the colour-magnitude plane. A search for other galaxies and clusters in the nearby region using the 2dF Galaxy Redshift Survey database suggests that the wall-like structure is a significant large-scale, non-virialized filament which runs between two other Abell clusters either side of Abell 22. The filament stretches over at least >40 Mpc in length and 10 Mpc in width at the redshift of Abell 22. | | Source: | arXiv, astro-ph/0412076 | | Services: | Forum | Review | PDF | Favorites | |
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