Self-similarity of temperature profiles in distant galaxy clusters: the quest for a universal law

Home

All issues

Volume 545 (September 2012)

A&A, 545 (2012) A41

Full HTML

Free Access

Table 3

Fit results using the functions defined in Sect. 4.2, obtained separately for the CC and NCC cluster sample, by fixing a = 0.045 and by alternately freezing each one of the other free parameters, except the normalization A.

	Fit function	χ²/d.o.f.	A	α ₀	ξ ₀	b	β ₀

CC	Eq. (3) (α₀ = 1.9)	56.1/28	1.17 ± 0.12	–	0.61 ± 0.15	0.33 ± 0.37	0.35 ± 0.40
	Eq. (3) (ξ₀ = 0.45)	55.8/28	1.30 ± 0.05	1.14 ± 0.59	–	0.28 ± 0.26	0.35 ± 0.32
	Eq. (3) (b = 0.6)	57.0/28	1.13 ± 0.17	1.89 ± 2.76	0.65 ± 0.28	–	0.72 ± 0.29
	Eq. (3) (β₀ = 0.45)	55.8/29	1.88 ± 0.07	0.41 ± 0.16	0^a	0.30 ± 0.07	–

NCC	Eq. (3) (α₀ = 1.9)	35.2/36	1.24 ± 0.12	–	0.94 ± 0.24	0.28 ± 0.17	0.29 ± 0.12
	Eq. (3) (ξ₀ = 0.45)	35.2/36	1.65 ± 0.09	0.18 ± 0.66	–	0.26 ± 0.19	0.30 ± 0.10
	Eq. (3) (b = 0.6)	37.0/36	1.17 ± 0.04	0^a	0.94 ± 0.13	–	0.62 ± 0.08
	Eq. (3) (β₀ = 0.45)	35.4/36	1.20 ± 0.04	unconstr .	0.91 ± 0.12	0.44 ± 0.05	–

Notes. The parameter α₀ defines the inner slope, ξ₀ defines the relative normalization between the inner and outer regions of the profiles, b defines the core radius of the external regions, while β₀ defines the outer slope.

^(a)

Parameter frozen by the fit.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.