XMM-newton observes Cl J0152.7-1357: a massive galaxy cluster forming at merger crossroads at z = 0.83

B. J. Maughan*, S. C. Ellis, L. R. Jones, K. O. Mason, F. A. Córdova, W. Priedhorsky

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


We present an analysis of a 50 ks XMM-Newton observation of the merging galaxy cluster Cl J0152.7-1357 at z = 0.83. In addition to the two main subclusters and an infalling group detected in an earlier Chandra observation of the system, XMM-Newton detects another group of galaxies possibly associated with the cluster. This group may be connected to the northern subcluster by a filament of cool (1.4-0.1 +0.3 keV) X-ray-emitting gas and lies outside the estimated virial radius of the northern subcluster. The X-ray morphology agrees well with the projected galaxy distribution in new K-band imaging data presented herein. We use detailed spectral and imaging analysis of the X-ray data to probe the dynamics of the system and find evidence that another subcluster or group has recently passed through the northern subcluster. Cl J0152.7-1357 is an extremely dynamically active system, with mergers at different stages occurring along two perpendicular merger axes.

Original languageEnglish
Pages (from-to)219-227
Number of pages9
JournalAstrophysical Journal
Issue number1 I
Publication statusPublished - 20 Mar 2006
Externally publishedYes


  • Cosmology: observations
  • Galaxies: clusters: general
  • Galaxies: clusters: individual (Cl J0152.7-1357)
  • Galaxies: high-redshift
  • Intergalactic medium
  • X-rays: galaxies


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