Substructures in WINGS clusters
- Ramella, M.
- Biviano, A.
- Pisani, A.
- Varela, J.
- Bettoni, D.
- Couch, W. J.
- D'Onofrio, M.
- Dressler, A.
- Fasano, G.
- Kjaergaard, P.
- Moles, M.
- Pignatelli, E.
- Poggianti, B. M.
DOIAbstract
We search for and characterize substructures in the projected distribution of galaxies observed in the wide field CCD images of the 77 nearby clusters of the WIde-field Nearby Galaxy-cluster Survey (WINGS). This sample is complete in X-ray flux in the redshift range 0.04<z<0.07. We search for substructures in WINGS clusters with DEDICA, an adaptive-kernel procedure. We test the procedure on Monte-Carlo simulations of the observed frames and determine the reliability for the detected structures. DEDICA identifies at least one reliable structure in the field of 55 clusters. 40 of these clusters have a total of 69 substructures at the same redshift of the cluster (redshift estimates of substructures are from color-magnitude diagrams). The frac...
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