Apples to apples A^{2}  II. Cluster selection functions for nextgeneration surveys
Abstract
We present the cluster selection function for three of the largest nextgeneration stageIV surveys in the optical and infrared: EuclidOptimistic, EuclidPessimistic and the Large Synoptic Survey Telescope (LSST). To simulate these surveys, we use the realistic mock catalogues introduced in the first paper of this series. We detected galaxy clusters using the Bayesian Cluster Finder in the mock catalogues. We then modelled and calibrated the total cluster stellar mass observabletheoretical mass (M^{*}_CLM_h) relation using a powerlaw model, including a possible redshift evolution term. We find a moderate scatter of σ _{M^{*}_CL  M_h} of 0.124, 0.135 and 0.136 dex for EuclidOptimistic, EuclidPessimistic and LSST, respectively, comparable to other work over more limited ranges of redshift. Moreover, the three data sets are consistent with negligible evolution with redshift, in agreement with observational and simulation results in the literature. We find that EuclidOptimistic will be able to detect clusters with >80 per cent completeness and purity down to 8 × 10^{13} h^{1} M_{⊙} up to z < 1. At higher redshifts, the same completeness and purity are obtained with the larger mass threshold of 2 × 10^{14} h^{1} M_{⊙} up to z = 2. The EuclidPessimistic selection function has a similar shape with ∼10 per cent higher mass limit. LSST shows ∼5 per cent higher mass limit than EuclidOptimistic up to z < 0.7 and increases afterwards, reaching a value of 2 × 10^{14} h^{1} M_{⊙} at z = 1.4. Similar selection functions with only 80 per cent completeness threshold have also been computed. The complementarity of these results with selection functions for surveys in other bands is discussed.
 Publication:

Monthly Notices of the Royal Astronomical Society
 Pub Date:
 January 2017
 DOI:
 10.1093/mnras/stw2508
 arXiv:
 arXiv:1605.07620
 Bibcode:
 2017MNRAS.464.2270A
 Keywords:

 catalogues;
 surveys;
 galaxies: abundances;
 galaxies: clusters: general;
 cosmological parameters;
 largescale structure of Universe;
 Astrophysics  Cosmology and Nongalactic Astrophysics
 EPrint:
 13 pages, 10 figures, accepted for publication in MNRAS