Open AccessDiscovery of a large‐scale wall in the direction of Abell 22
Author(s) -
Pimbblet Kevin A.,
Edge Alastair C.,
Couch Warrick J.
Publication year - 2005
Publication title -
monthly notices of the royal astronomical society: letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.067
H-Index - 122
eISSN - 1745-3933
pISSN - 1745-3925
DOI - 10.1111/j.1745-3933.2005.00015.x
Subject(s) - physics , astrophysics , protein filament , redshift , galaxy , observatory , astronomy , abell 2744 , galaxy cluster , cluster (spacecraft) , redshift survey , brightest cluster galaxy , genetics , computer science , biology , programming language
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, by examining the galaxy distributions both in redshift space and on the colour–magnitude plane, that Abell 22 exhibits a foreground wall‐like structure. A search for other galaxies and clusters in the nearby region using the 2dF Galaxy Redshift Survey data base 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 h −1 Mpc in length and 10 h −1 Mpc in width at the redshift of Abell 22.