A New Algorithm for the Detection of Inter-cluster Galaxy Filaments using Galaxy Orientation Alignments

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.

7 pages, 5 figures, accepted for publication in MNRAS

References in corpus (7)

• The origin and implications of dark matter anisotropic cosmic infall on ~L* haloes
• Cluster Alignments and Ellipticities in LCDM Cosmology
• Discovery of a large-scale filament connected to the massive galaxy cluster MACSJ0717.5+3745 at z=0.55
• Inter-cluster Filaments of Galaxies Programme: Abundance and Distribution of Filaments in the 2dFGRS Catalogue
• Spectroscopic Confirmation of the Cl 1604 Supercluster at z~0.9
• Intrinsic Inclination of Galaxies embedded in Cosmic Sheets and its Cosmological Implications: An Analytic Calculation
• Discovery of a Large-scale Wall in the Direction of Abell 22

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