| DOI | Trouver le DOI : https://doi.org/10.1093/mnras/sts540 |
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| Auteur | Rechercher : Willis, J. P.; Rechercher : Clerc, N.; Rechercher : Bremer, M. N.; Rechercher : Pierre, M.; Rechercher : Adami, C.; Rechercher : Ilbert, O.; Rechercher : Maughan, B.; Rechercher : Maurogordato, S.; Rechercher : Pacaud, F.; Rechercher : Valtchanov, I.; Rechercher : Chiappetti, L.; Rechercher : Thanjavur, K.; Rechercher : Gwyn, S.1; Rechercher : Stanway, E. R.; Rechercher : Winkworth, C. |
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| Affiliation | - Conseil national de recherches du Canada. Infrastructure scientifique nationale
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| Format | Texte, Article |
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| Résumé | Distant galaxy clusters provide important tests of the growth of large-scale structure in addition to highlighting the process of galaxy evolution in a consistently defined environment at large look-back time. We present a sample of 22 distant (z > 0.8) galaxy clusters and cluster candidates selected from the 9 deg² footprint of the overlapping X-ray Multi Mirror (XMM) Large Scale Structure (LSS), CFHTLS-Wide and Spitzer-SWIRE surveys. Clusters are selected as extended X-ray sources with an accompanying overdensity of galaxies displaying optical to mid-infrared photometry consistent with z > 0.8. Nine clusters have confirmed spectroscopic redshifts in the interval 0.8 < z < 1.2, four of which are presented here for the first time. A further 11 candidate clusters have between 8 and 10 band photometric redshifts in the interval 0.8 < z < 2.2, while the remaining two candidates do not have information in sufficient wavebands to generate a reliable photometric redshift. All of the candidate clusters reported in this paper are presented for the first time. Those confirmed and candidate clusters with available near-infrared photometry display evidence for a red sequence galaxy population, determined either individually or via a stacking analysis, whose colour is consistent with the expectation of an old, coeval stellar population observed at the cluster redshift. We further note that the sample displays a large range of red fraction values indicating that the clusters may be at different stages of red sequence assembly. We compare the observed X-ray emission to the flux expected from a suite of model clusters and find that the sample displays an effective mass limit M200 ∼ 1 × 10¹⁴ ⊙ with all clusters displaying masses consistent with M200 < 5 × 10¹⁴ M⊙. This XMM distant cluster study represents a complete sample of X-ray-selected z > 0.8 clusters. We discuss the importance of this sample to investigate the abundance of high-redshift clusters and to provide a relatively unbiased view of distant cluster galaxy populations. © 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society. |
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| Date de publication | 2013-01-28 |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Numéro NPARC | 21271831 |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 9d42320f-624e-4884-a085-a43a42f6eb8c |
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| Enregistrement créé | 2014-04-23 |
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| Enregistrement modifié | 2020-04-22 |
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