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Table 7

Observationally determined slopes of the Entropy – T and entropy – mass relation.

Relation Slope Comments Reference

K500 − T 0.92 ± 0.24 31 clusters XMM-Newton Pratt10
K1000 − T 0.83 ± 0.06 Pratt10
K2500 − T 0.76 ± 0.06 Pratt10
K1000 − T 0.83 ± 0.06 Pratt10
K500 − M500 0.62 ± 0.17 Pratt10
K2500 − M2500 0.42 ± 0.05 Pratt10

Notes. 

(a)

Limited to systems with mass  ≥3 × 1013   M.

(b)

Limited to systems with temperature  ≥ 0.6 keV.

The references is Pratt et al. (2010).

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