Volume 373, Number 3, July III 2001
|L33 - L36
|15 July 2001
Self-similarity of clusters of galaxies and the relation
CEA/Saclay DSM/DAPNIA/ Service d'Astrophysique, L'Orme des Merisiers, Bât. 709, 91191 Gif-sur-Yvette, France e-mail: email@example.com
Corresponding author: D. M. Neumann, firstname.lastname@example.org
Accepted: 28 May 2001
In this paper based on ROSAT/PSPC data we investigate the emission measure profiles of a sample of hot clusters of galaxies ( keV) in order to explain the differences between observed and theoretically predicted LX-T relation. Looking at the form of the emission measure profiles as well as their normalizations we find clear indication that indeed the profiles have similar shapes once scaled to the virial radius, however, the normalization of the profiles shows a strong temperature dependence. We introduce a Mgas-T relation with the dependence . This relationship explains the observed LX-T relation and reduces the scatter in the scaled profiles by a factor of 2 when compared to the classical scaling. We interpret this finding as strong indication that the Mgas-T relation in clusters deviates from classical scaling.
Key words: galaxies: clusters: general / cosmology: observations, dark matter / X-rays: general
© ESO, 2001
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.