Volume 474, Number 2, November I 2007
|Page(s)||355 - 364|
|Section||Cosmology (including clusters of galaxies)|
|Published online||06 August 2007|
Selection effects on X-ray and strong-lensing clusters in various cosmologies
Zentrum für Astronomie, ITA, Universität Heidelberg, Albert-Überle-Str. 2, 69120 Heidelberg, Germany e-mail: email@example.com
Accepted: 31 July 2007
Galaxy 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 produce ~ of the strong-lensing optical depth, and only ~ above a flux limit of if mergers are taken into account.
Key words: X-rays: galaxies: clusters / gravitational lensing / dark matter / galaxies: clusters: general
© ESO, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.