Planck 2015 results - XXIV. Cosmology from Sunyaev-Zeldovich cluster counts

Planck 2015 results

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Table 1

Summary of SZ-mass scaling-law parameters (see Eq. (7)).

Parameter	Value

log Y_∗	−0.19 ± 0.02
α ^a	1.79 ± 0.08
β ^b	0.66 ± 0.50
σ _lnY ^c	0.173 ± 0.023

Notes.

^(a)

Except when specified, α is constrained by this prior in our one-dimensional likelihood over N(z), but left free in our two-dimensional likelihood over N(z,q).

^(b)

We fix β to its central value throughout, except when examining modelling uncertainties in the Appendix.

^(c)

The value is the same as in our 2013 analysis, given here in terms of the natural logarithm and computed from σ_log Y = 0.075 ± 0.01.

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