Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-09-08
Mon.Not.Roy.Astron.Soc.347:137,2004
Astronomy and Astrophysics
Astrophysics
9 pages. 9 figures. Accepted for publication in MNRAS
Scientific paper
10.1111/j.1365-2966.2004.07178.x
We present results from a pilot study of a new wide-field, multicolour (BVR) CCD imaging project, designed to examine galaxy evolution along large scale filaments that connect clusters of galaxies at intermediate redshifts (0.08 < z < 0.20). Our pilot dataset is based on 0.56 square degrees of observations targeted on Abell 1079 and Abell 1084 using the Wide Field Imager on the Anglo-Australian Telescope. We describe our data reduction pipeline and show that our photometric error is 0.04 mags. By selecting galaxies that lie on the colour-magnitude relation of the two clusters we verify the existence of a low density (approx 3-4 square Mpc) filament population conjoining them at a distance of > 3 r_{Abell} from either cluster. By applying a simple field correction, we characterize this filament population by examining their colour distribution on a (V-R)-(B-V) plane. We confirm the galaxian filament detection at a 7.5 sigma level using a cut at M_V=-18 and we discuss their broad properties.
Drinkwater Michael. J.
Pimbblet Kevin A.
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