EAS Publications Series

Mass Profiles and Shapes of Cosmological Structures
G.A. Mamon, F. Combes, C. Deffayet and B. Fort (eds)
EAS Publications Series, 20 (2006) 183-186
DOI: 10.1051/eas:2006068

Relaxed and unrelaxed clusters of galaxies seen in X-rays

F. Durret¹, G.B. Lima Neto², C. Adami³, J. Bagchi⁴, G. Covone⁵, W. Forman⁶, J.-P. Kneib³, E. Slezak⁷ and G. Soucail⁸

¹ Institut d'Astrophysique de Paris, CNRS, 98bis Bd. Arago, 75014 Paris, France
² IAG, São Paulo, Brazil
³ LAM, Marseille, France
⁴ IUCAA, Pune, India
⁵ INAF, Oss. Capodimonte, Naples, Italy
⁶ CfA, Cambridge MA, USA
⁷ OCA, Nice, France
⁸ OMP, Toulouse, France

Abstract

Recent X-ray observations have been showing that the old vision of clusters as peacefully relaxed structures is in most cases absolutely wrong. Coupled with optical and radio observations, these X-ray data show evidence for violent mechanisms. Results based on XMM-Newton gas temperature maps for four clusters will be presented here.