paper

An Accurate Cluster Selection Function for the J-PAS Narrow-Band wide-field survey

arXiv:1601.00656 · doi:10.1093/mnras/stv2988

Abstract

The impending Javalambre Physics of the accelerating universe Astrophysical Survey (J-PAS) will be the first wide-field survey of 8500 deg to reach the `stage IV' category. Because of the redshift resolution afforded by 54 narrow-band filters, J-PAS is particularly suitable for cluster detection in the range z1. The photometric redshift dispersion is estimated to be only with few outliers 4\% for galaxies brighter than AB, because of the sensitivity of narrow band imaging to absorption and emission lines. Here we evaluate the cluster selection function for J-PAS using N-body+semi-analytical realistic mock catalogues. We optimally detect clusters from this simulation with the Bayesian Cluster Finder, and we assess the completeness and purity of cluster detection against the mock data. The minimum halo mass threshold we find for detections of galaxy clusters and groups with both 80\% completeness and purity is up to . We also model the optical observable, -halo mass relation, finding a non-evolution with redshift and main scatter of down to a factor two lower in mass than other planned broad-band stage IV surveys, at least. For the Planck mass limit, J-PAS will arrive up to with a . Therefore J-PAS will provide the largest sample of clusters and groups up to with a mass calibration accuracy comparable to X-ray data.

16 pages, 15 figures, accepted for publication in MNRAS

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