2011

Planck Early Results VIII: The all-sky Early Sunyaev-Zeldovich cluster sample

Planck Collaboration, Ade, P. A. R., Aghanim, N. et al.

Understand

We present the first all-sky sample of galaxy clusters detected blindly by the Planck satellite through the Sunyaev-Zeldovich (SZ) effect from its six highest frequencies.

  • This early SZ (ESZ) sample is comprised of 189 candidates, which have a high signal-to-noise ratio ranging from 6 to 29.
  • Its high reliability (purity above 95%) is further ensured by an extensive validation process based on Planck internal quality assessments and by external cross-identification and follow-up observations.
  • Planck provides the first measured SZ signal for about 80% of the 169 previously-known ESZ clusters.

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