Photometric validation of a model independent procedure to extract galaxy clusters
Astrophysics
2009-11-07 v1
Abstract
By means of CCD photometry in three bands (Gunn g, r, i) we investigate the existence of 12 candidate clusters extracted via a model independent peak finding algorithm (\cite{memsait}) from DPOSS data. The derived color-magnitude diagrams allow us to confirm the physical nature of 9 of the cluster candidates, and to estimate their photometric redshifts. Of the other candidates, one is a fortuitous detection of a true cluster at z~0.4, one is a false detection and the last is undecidable on the basis of the available data. The accuracy of the photometric redshifts is tested on an additional sample of 8 clusters with known spectroscopic redshifts. Photometric redshifts turn out to be accurate within z~0.01 (interquartile range).
Cite
@article{arxiv.astro-ph/0110321,
title = {Photometric validation of a model independent procedure to extract galaxy clusters},
author = {E. Puddu and S. Andreon and G. Longo and V. Strazzullo and M. Paolillo and R. Gal},
journal= {arXiv preprint arXiv:astro-ph/0110321},
year = {2009}
}
Comments
A&A in press