Volume 379, Number 2, November IV 2001
|Page(s)||426 - 435|
|Section||Cosmology (including clusters of galaxies)|
|Published online||15 November 2001|
Photometric validation of a model independent procedure to extract galaxy clusters*
Osservatorio Astronomico di Capodimonte, via Moiariello 16, 80131 Napoli, Italy
2 Dipartimento di Scienze Fisiche, Università Federico II, Napoli, Italy
3 Dipartimento di Scienze Fisiche ed Astronomiche, Università di Palermo, Napoli, Italy
4 Johns Hopkins University, Dept. of Physics and Astronomy, 3701 San Martin Dr., Baltimore, MD 21218, USA
Corresponding author: E. Puddu, email@example.com
Accepted: 20 September 2001
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]) 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 , 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 (interquartile range).
Key words: methods: data analysis / galaxies: clusters: general / galaxies: distances and redshifts
© ESO, 2001
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.