Galaxy clusters and groups in the ALHAMBRA survey

DOI: 
10.1093/mnras/stv1317
Publication date: 
01/09/2015
Main author: 
Ascaso B.
IAA authors: 
Ascaso B.;Benítez N.;Molino A.;Schoenell W.;Jiménez-Teja Y.;Márquez I.;Masegosa J.;Pović M.;D. Olmo A.;Moles M.;Perea J.;Alfaro E.;Aparicio-Villegas T.;Cerviño M.;Delgado R.M.G.;Husillos C.;Prada F.;Quintana J.M.
Authors: 
Ascaso B., Benítez N., Fernández-Soto A., Arnalte-Mur P., López-sanjuan C., Molino A., Schoenell W., Jiménez-Teja Y., Merson A.I., Huertas-Company M., Díaz-García L.A., Martínez V.J., Cenarro A.J., Dupke R., Márquez I., Masegosa J., Nieves-Seoane L., Pović M., Varela J., Viironen K., Aguerri J.A.L., D. Olmo A., Moles M., Perea J., Alfaro E., Aparicio-Villegas T., Broadhurst T., Cabrera-Caño J., Castander F.J., Cepa J., Cerviño M., Delgado R.M.G., Cristóbal-hornillos D., Hurtado-Gil L., Husillos C., Infante L., Prada F., Quintana J.M.
Journal: 
Monthly Notices of the Royal Astronomical Society
Publication type: 
Article
Volume: 
452
Pages: 
549-565
Number: 
Abstract: 
We present a catalogue of 348 galaxy clusters and groups with 0.2 < z < 1.2 selected in the 2.78 deg2 Advanced Large, Homogeneous Area Medium Band Redshift Astronomical (ALHAMBRA) survey. The high precision of our photometric redshifts, close to 1 per cent, and the wide spread of the seven ALHAMBRA pointings ensure that this catalogue has better mass sensitivity and is less affected by cosmic variance than comparable samples. The detection has been carried out with the Bayesian Cluster Finder, whose performance has been checked in ALHAMBRA-like light-cone mock catalogues. Great care has been taken to ensure that the observable properties of the mocks photometry accurately correspond to those of real catalogues. From our simulations, we expect to detect galaxy clusters and groups with both 70 per cent completeness and purity down to dark matter halo masses of M<inf>h</inf> ~ 3 × 1013M<inf>*</inf> for z < 0.85. Cluster redshifts are expected to be recovered with ~0.6 per cent precision for z < 1. We also expect to measure cluster masses with σM<inf>h</inf>|M<inf>CL</inf>* ~ 0.25-0.35 precision down to ~ 3 × 1013M<inf>⊙</inf>, masses which are 50 per cent smaller than those reached by similar work. We have compared these detections with previous optical, spectroscopic and X-rays work, finding an excellent agreement with the rates reported from the simulations. We have also explored the overall properties of these detections such as the presence of a colour-magnitude relation, the evolution of the photometric blue fraction and the clustering of these sources in the different ALHAMBRA fields. Despite the small numbers, we observe tentative evidence that, for a fixed stellar mass, the environment is playing a crucial role at lower redshifts (z < 0.5). © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Database: 
WOK
SCOPUS
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2015MNRAS.452..549A/abstract
ADS Bibcode: 
2015MNRAS.452..549A
Keywords: 
Catalogues; Cosmology: observations; Galaxies: clusters: general; Galaxies: evolution; Large-scale structure of Universe; X-rays: galaxies: clusters