Query : 2001A&A...373L..33N

2001A&A...373L..33N - Astronomy and Astrophysics, volume 373, L33-36 (2001/7-3)

Self-similarity of clusters of galaxies and the LX-T relation.


Abstract (from CDS):

In this paper based on ROSAT/PSPC data we investigate the emission measure profiles of a sample of hot clusters of galaxies (kT>3.5keV) 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 Mgas∝T1.94. 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.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - cosmology: observations, dark matter - X-rays: general

Simbad objects: 3

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Number of rows : 3
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
1 ACO 780 ClG 09 18 30 -12 15.7           ~ 445 0
2 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 295 1
3 ACO 2163 ClG 16 15 34.1 -06 07 26           ~ 542 0

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