EDP Sciences
Free Access
Volume 429, Number 1, January I 2005
Page(s) 85 - 99
Section Cosmology (including clusters of galaxies)
DOI https://doi.org/10.1051/0004-6361:20041296
Published online 13 December 2004

A&A 429, 85-99 (2005)
DOI: 10.1051/0004-6361:20041296

XMM-Newton study of the lensing cluster of galaxies CL 0024+17

Y.-Y. Zhang1, H. Böhringer1, Y. Mellier2, G. Soucail3 and W. Forman4

1  Max-Planck-Institut für extraterrestrische Physik, Giessenbachstraße, 85748 Garching, Germany
    e-mail: yyzhang@mpe.mpg.de
2  Institut d'Astrophysique de Paris, 98bis Bd. Arago, 75014 Paris, France
3  Observatoire Midi-Pyrénées, Laboratoire d'Astrophysique, MR 5572, 14 avenue E. Belin, 31400 Toulouse, France
4  Harvard-Smithsonian Center for Astrophysics (CFA), 60 Garden Street, Cambridge, MA 02138, USA

(Received 14 May 2004 / Accepted 27 August 2004)

We present a detailed gravitational mass measurement based on the XMM-Newton imaging spectroscopy analysis of the lensing cluster of galaxies CL 0024+17 at z=0.395. The emission appears approximately symmetric. However, on the scale of  $r \sim 3.3^{\prime}$ some indication of elongation is visible in the northwest-southeast (NW-SE) direction from the hardness ratio map (HRM). Within  $3^{\prime}$, we measure a global gas temperature of  3.52  $\pm$ 0.17 keV, metallicity of  0.22  $\pm$ 0.07, and bolometric luminosity of  2.9  $\pm$ 0.1  $\times$ 1044 h-270 erg s -1. We derive a temperature distribution with an isothermal temperature of 3.9 keV to a radius of  $1.5^{\prime}$ and a temperature gradient in the outskirts ( $1.3^{\prime}<r<3^{\prime}$). Under the assumption of hydrostatic equilibrium, we measure gravitational mass and gas mass fraction to be M200=2.0  $\pm$ 0.3  $\times$ 1014  $h_{70}^{-1}~{M_{\odot}}$ and $f_{\rm gas}=0.20$  $\pm$ 0.03 h-3/270 at  r200=1.05 h-170 Mpc using the observed temperature profile. The complex structure in the core region is the key to explaining the discrepancy in gravitational mass determined from XMM-Newton X-ray observations and HST optical lensing measurements.

Key words: galaxies: clusters: individual: CL 0024+17 -- cosmology: dark matter -- gravitational lensing -- cosmology: observations -- X-rays: galaxies: clusters

SIMBAD Objects

© ESO 2004

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.