XMM-Omega project : cosmological implication from the high-z L-T relation of X-ray clusters

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dc.creatorVauclair, Sebastien C.
dc.creatorBlanchard, Alain
dc.creatorcollaboration, the XMM-Omega project
dc.date2003-11-28
dc.date.accessioned2026-07-07T02:11:23Z
dc.date.available2026-07-07T02:11:23Z
dc.descriptionThe evolution of the temperature distribution function (TDF) of X-ray clusters is kn own to be a powerful cosmological test of the density parameter of the Universe. Recent XMM observations allows us to measure accurately the L - T relation of high redshift X-ray clusters. In order to investigate cosmological implication of this recent results, we have derived theoretical number counts for different X-ray clusters samp les, namely the RDCS, EMSS, SHARC, 160 deg^2 and MACS at z > 0.3 in different fl at models. We show that a standard hierarchical modeling of cluster distribution in a flat low density universe, normalized to the local abundance, overproduces cluster abundance at high redshift (z>0.5) by an order of magnitude. We conclude that presently existing data on X-ray clusters at high redshift strongly favor a universe with a high density of matter, insensitively to the details of the modeli ng.
dc.description3 pages, proceeding of the Mykonos conference 'Multiwavelength Cosmology'
dc.identifierhttps://arxiv.org/abs/astro-ph/0311626
dc.identifierhttp://arxiv.org/abs/astro-ph/0311626
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7060
dc.subjectAstrophysics
dc.titleXMM-Omega project : cosmological implication from the high-z L-T relation of X-ray clusters
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