Ageing and dynamics of the tailed radio galaxies in Abell 2142

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Volume 690 (October 2024)

A&A, 690 (2024) A329

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Table 5

Integrated spectral index of T1 and T2.

Area	Power law	ν (MHz)	α	$χ_{red}^{2}$ $\[\chi_{\text {red }}^2\]$
T1	Solid blue	50–1810	0.87 ± 0.01	0.5
T1-A	Solid red	50–1810	0.68 ± 0.02	0.7
T1-B	Solid orange	50–234	0.97 ± 0.11	1.9
T1-B	Dotted orange	234–1284	1.74 ± 0.04	0.9
T1-C	Solid cyan	50–234	1.31 ± 0.17	4.2
T1-C	Dotted cyan	234–1284	2.28 ± 0.05	0.8
T1-D	Solid green	50–323	1.87 ± 0.25	7.5
T2	Solid blue	50–1810	1.39 ± 0.05	5.9
T2-A	Solid red	50–407	0.67 ± 0.06	1.2
T2-A	Dotted red	407–1810	1.07 ± 0.06	2.1
T2-B	Solid orange	50–407	0.96 ± 0.06	1.5
T2-B	Dotted orange	407–1810	1.63 ± 0.10	6.5
T2-C	Solid cyan	50–407	1.53 ± 0.08	2.3
T2-C	Dotted cyan	407–1810	2.22 ± 0.07	1.5
T2-D	Solid green	143–5500	0.69 ± 0.02	1.3

Notes. Col. 1: considered area. Col. 2: colour and line style of the fitted power law as in Fig. 6. Col. 3: frequency range. Col. 4: fitted spectral index. Col. 5: reduced χ-squared.

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