Selection effects on X-ray and strong-lensing clusters in various cosmologies

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dc.creatorFedeli, C.
dc.creatorBartelmann, M.
dc.date2007-03-30
dc.date2007-09-25
dc.date.accessioned2026-07-07T11:42:52Z
dc.date.available2026-07-07T11:42:52Z
dc.descriptionGalaxy clusters are hotter and more X-ray luminous than in quiescence while they undergo major mergers, which also transiently increase their strong-lensing efficiency. We use semi-analytic models for both effects to study how cluster dynamics in different dark-energy models affects the X-ray selected cluster population and its strong-lensing optical depth. We find that mergers increase the number of observable X-ray clusters by factors of a few and considerably broaden their redshift distribution. Strong-lensing optical depths are increased by a very similar amount. Quite independent of cosmology, X-ray bright clusters above a flux limit of $10^{-13.5} \mathrm{erg s^{-1} cm^{-2}}$ produce $\sim60%$ of the strong-lensing optical depth, and only $\sim1%$ above a flux limit of $10^{-11.5} \mathrm{erg s^{-1} cm^{-2}}$ if mergers are taken into account.
dc.description11 pages, 9 figures. Version accepted by A&A
dc.identifierhttps://arxiv.org/abs/astro-ph/0703789
dc.identifierhttp://arxiv.org/abs/astro-ph/0703789
dc.identifierAstron.Astrophys.474:355-364,2007
dc.identifierdoi:10.1051/0004-6361:20077572
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/201038
dc.subjectAstrophysics
dc.titleSelection effects on X-ray and strong-lensing clusters in various cosmologies
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