Scaling relations of the colour-detected cluster RzCS 052 at <i>z</i>=1.016 and some other high-redshift clusters

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dc.contributor.authorAndreon, S.
dc.contributor.authorDe Propris, R.
dc.contributor.authorPuddu, E.
dc.contributor.authorGiordano, L.
dc.contributor.authorQuintana, H.
dc.date.accessioned2025-01-21T01:05:12Z
dc.date.available2025-01-21T01:05:12Z
dc.date.issued2008
dc.description.abstractWe report on the discovery of the z = 1.016 cluster RzCS 052 using a modified red-sequence method, follow up spectroscopy and X-ray imaging. This cluster has a velocity dispersion of 710 +/- 150 km s(-1), a virial mass of 4.0 x 10(14) M-circle dot (based on 21 spectroscopically confirmed members) and an X-ray luminosity of (0.68 +/- 0.47) x 10(44) erg s(-1) in the [1-4] keV band. This optically selected cluster appears to be of richness class 3 and to follow the known L-X-sigma(v) relation for high-redshift X-ray selected clusters. Using these data, we find that the halo occupation number for this cluster is only marginally consistent with what was expected assuming a self-similar evolution of cluster scaling relations, suggesting perhaps a break of them at z similar to 1. We also rule out a strong galaxy merging activity between z = 1 and today. Finally, we present a Bayesian approach to measuring cluster velocity dispersions and X-ray luminosities in the presence of a background: we critically reanalyse recent claims for X-ray underluminous clusters using these techniques and find that the clusters can be accommodated within the existing L-X-sigma(v) relation.
dc.fuente.origenWOS
dc.identifier.doi10.1111/j.1365-2966.2007.12541.x
dc.identifier.eissn1365-2966
dc.identifier.issn0035-8711
dc.identifier.urihttps://doi.org/10.1111/j.1365-2966.2007.12541.x
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/95853
dc.identifier.wosidWOS:000251813700019
dc.issue.numero1
dc.language.isoen
dc.pagina.final112
dc.pagina.inicio102
dc.revistaMonthly notices of the royal astronomical society
dc.rightsacceso restringido
dc.subjectmethods : statistical
dc.subjectgalaxies : clusters : general
dc.subjectgalaxies : clusters : individual : RzCS 052
dc.subjectgalaxies : evolution
dc.subjectdark matter
dc.subjectX-rays : galaxies : clusters
dc.titleScaling relations of the colour-detected cluster RzCS 052 at <i>z</i>=1.016 and some other high-redshift clusters
dc.typeartículo
dc.volumen383
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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