Quick Search:

uzh logo
Browse by:

Zurich Open Repository and Archive

Maintenance: Tuesday, July the 26th 2016, 07:00-10:00

ZORA's new graphical user interface will be relaunched (For further infos watch out slideshow ZORA: Neues Look & Feel). There will be short interrupts on ZORA Service between 07:00am and 10:00 am. Please be patient.

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-60056

Soares-Santos, M; de Carvalho, R R; Annis, J; Gal, R R; La Barbera, F; Lopes, P A A; Wechsler, R H; Busha, M T; Gerke, B F (2010). The Voronoi Tessellation cluster finder in 2+1 dimensions. Astrophysical Journal, 727(1):45.

Accepted Version (English)
View at publisher


We present a detailed description of the Voronoi Tessellation (VT) cluster finder algorithm in 2+1 dimensions, which improves on past implementations of this technique. The need for cluster finder algorithms able to produce reliable cluster catalogs up to redshift 1 or beyond and down to $10^{13.5}$ solar masses is paramount especially in light of upcoming surveys aiming at cosmological constraints from galaxy cluster number counts. We build the VT in photometric redshift shells and use the two-point correlation function of the galaxies in the field to both determine the density threshold for detection of cluster candidates and to establish their significance. This allows us to detect clusters in a self consistent way without any assumptions about their astrophysical properties. We apply the VT to mock catalogs which extend to redshift 1.4 reproducing the $\Lambda$CDM cosmology and the clustering properties observed in the SDSS data. An objective estimate of the cluster selection function in terms of the completeness and purity as a function of mass and redshift is as important as having a reliable cluster finder. We measure these quantities by matching the VT cluster catalog with the mock truth table. We show that the VT can produce a cluster catalog with completeness and purity $>80%$ for the redshift range up to $\sim 1$ and mass range down to $\sim 10^{13.5}$ solar masses.


24 citations in Web of Science®
6 citations in Scopus®
Google Scholar™



15 downloads since deposited on 23 Feb 2012
3 downloads since 12 months

Detailed statistics

Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:07 Faculty of Science > Institute for Computational Science
Dewey Decimal Classification:530 Physics
Deposited On:23 Feb 2012 22:07
Last Modified:05 Apr 2016 15:40
Publisher:Institute of Physics Publishing
Publisher DOI:10.1088/0004-637X/727/1/45
Related URLs:http://arxiv.org/abs/1011.3458

Users (please log in): suggest update or correction for this item

Repository Staff Only: item control page