The X-ray/SZ view of the virial region - I. Thermodynamic properties

  title={The X-ray/SZ view of the virial region - I. Thermodynamic properties},
  author={Dominique Eckert and Silvano Molendi and Franco Vazza and Stefano Ettori and St{\'e}phane Paltani},
  journal={Astronomy and Astrophysics},
We measure the thermodynamic properties of cluster outer regions to provide constraints on the processes that rule the formation of large scale structures. We derived the thermodynamic properties of the intracluster gas (temperature, entropy) by combining the SZ thermal pressure from Planck and the X-ray gas density from ROSAT. This method allowed us to reconstruct for the first time temperature and entropy profiles out to the virial radius and beyond in a large sample of objects. At variance… 
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