Astronomy and Astrophysics – Astrophysics
Scientific paper
2008-10-21
Astronomy and Astrophysics
Astrophysics
Poster presented at ICHEP08, Philadelphia, USA, July 2008
Scientific paper
In the present work we focus on future experiments using cluster abundance observations to constraint the Dark Energy equation of state parameter, w. To obtain tight constraints from this kind of experiment, a reliable sample of galaxy clusters must be obtained from deep and wide-field images. We therefore present the computational environment (2DPHOT) that allow us to build the galaxy catalog from the images and the Voronoi Tessellation cluster finding algorithm that we use to identify the galaxy clusters on those catalogs. To test our pipeline with data similar in quality to what will be gathered by future wide field surveys, we process images from the Deep fields obtained as part of the LEGACY Survey (four fields of one square degree each, in five bands, with depth up to r'=25). We test our cluster finder by determining the completeness and purity of the finder when applied to mock galaxy catalogs made for the Dark Energy Survey cluster finder comparison project by Risa Wechsler and Michael Busha. This procedure aims to understand the selection function of the underlying dark matter halos.
Annis James
de Carvalho Reinaldo R.
La Barbera Francesco
Lopes Paulo A. A.
Soares-Santos Marcelle
No associations
LandOfFree
Cosmography with Galaxy Clusters does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Cosmography with Galaxy Clusters, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cosmography with Galaxy Clusters will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-572134