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A New Algorithm for the Detection of Inter-cluster Galaxy Filaments using Galaxy Orientation Alignments | | Kevin A. Pimbblet
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11 Dec 2004 | | Journal: | Mon.Not.Roy.Astron.Soc. 358 (2005) 256 | | Subject: | astro-ph | | Abstract: | We present a new algorithm to detect inter-cluster galaxy filaments based upon the assumption that the orientations of constituent galaxies along such filaments are non-isotropic. We apply the algorithm to the 2dF Galaxy Redshift Survey catalogue and find that it readily detects many straight filaments between close cluster pairs. At large inter-cluster separations (>15 Mpc), we find that the detection efficiency falls quickly, as it also does with more complex filament morphologies. We explore the underlying assumptions and suggest that it is only in the case of close cluster pairs that we can expect galaxy orientations to be significantly correlated with filament direction. | | Source: | arXiv, astro-ph/0501181 | | Services: | Forum | Review | PDF | Favorites | |
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