Volume 471, Number 1, August III 2007
|Page(s)||31 - 50|
|Section||Cosmology (including clusters of galaxies)|
|Published online||30 May 2007|
ARCRAIDER. I. Detailed optical and X-ray analysis of the cooling flow cluster Z3146*
Institut für Astro- und Teilchenphysik, University of Innsbruck, Technikerstr. 25, 6020 Innsbruck, Austria e-mail: firstname.lastname@example.org
2 INAF – Osservatorio Astronomico di Bologna, via Ranzani 1, 40127 Bologna, Italy
3 Argelander-Institut für Astronomie (AIfA), University of Bonn, Auf dem Hügel 71, 53121 Bonn, Germany
Accepted: 6 April 2007
We present a detailed analysis of the medium redshift (z = 0.2906) galaxy cluster Z3146 which is part of the ongoing ARCRAIDER project, a systematic search for gravitational arcs in massive clusters of galaxies. The analysis of Z3146 is based on deep optical wide field observations in the B, V and R bands obtained with the WFI@ESO2.2m, and shallow archival WFPC2@HST taken with the filter, which are used for strong as well as weak lensing analyses. Additionally we have used publicly available XMM/Newton observations for a detailed X-ray analysis of Z3146. Both methods, lensing and X-ray, were used to determine the dynamical state and to estimate the total mass. We also identified four gravitational arc candidates. We find this cluster to be in a relaxed state, which is confirmed by a large cooling flow with nominal ~1600 per year, regular galaxy density and light distributions and a regular shape of the weak lensing mass reconstruction. The mass content derived with the different methods agrees well within 25% at kpc indicating a velocity dispersion of km s-1.
Key words: gravitational lensing / galaxies: clusters: individual: Z3146
Based on observations made with the NASA/ESA Hubble Space Telescope, obtained from the data archive at the Space Telescope Institute (PID-number 8301). STScI is operated by the association of Universities for Research in Astronomy, Inc. under the NASA contract NAS 5-26555. Also based on observations made with ESO Telescopes at the La Silla or Paranal Observatories under programme ID 68.A-02555 and 073.A-0050 and on observations with XMM-Newton, an ESA Science Mission with instruments and contributions directly funded by ESA Member states and the USA (NASA).
© ESO, 2007
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