Open Access

Table A.1.

List of magnetic field measurements in galaxy clusters and groups derived from spectro-polarimetric modelling of cluster diffuse sources or RM analysis.

Name z type dens. n0 rc β P.S. ζ Λmin Λmax B0 η M500 R500
mod. 10−3 kpc mod. kpc kpc μG 1014M Mpc
3C31 0.0169 GG β 1.9 51 0.38 bpl 2.32 6 452 6.7 1 0.4 0.52
3. 6 ¯ Mathematical equation: $ \overline{6} $ 5.5
3C449 0.017 GG β 3.7 57.1 0.42 bpl 2.07 0.2* 65 3.5 1
2.98 11
A119 0.044 MMC β 1.4 379 0.56 pl 2 6 772 6 0.89 2.5 0.94
A194 0.0179 LRC β 0.69 245 0.67 pl 3. 6 ¯ Mathematical equation: $ \overline{6} $* 1* 64 1.5 1.1 0.4 0.52
A2142 0.0894 MMC univ. 7.44 0.07 0.39 df 7* 463 6 0.5* 8.1 1.38
0.7 0.6 2.6 1.1* 0.005*
A2199 0.0311 MRC 2β 74 9 1.5 pl 2.8 0.7 35 11.7 0.9 2.9 1.0
27 26 0.39
A2255 0.0806 MMC β 2.05 432 0.74 pl 3 4* 512* 2 0.5* 3.7 1.07
A2345 0.1789 MMC dβ 2.8 192 0.67 df 8* 978* 2.8 1 4.1 1.07
0.56 2148 1.48 1.054* 0.004*
A2382 0.0618 MRC 2β 1.2 374 0.9 pl 3. 6 ¯ Mathematical equation: $ \overline{6} $ 12* 70 3 0.5 1.1 0.71
3.8 65.7 1.7
A2634 0.0302 MRC β 1.2 178 0.79 pl 3.6 2.2 10.5 3 1 1.2 0.75
A3581 0.0221 MRC β 33.6 10.2 0.47 pl 3. 6 ¯ Mathematical equation: $ \overline{6} $* 4* 100* 2.2 0.5 1.1 0.72
A400 0.0231 LMC β 1.6 109 0.54 pl 3.8 1.4 7.8 6 1 0.8 0.65
A523 0.104 MMC β 1.1 185 0.42 bpl 3. 6 ¯ Mathematical equation: $ \overline{6} $* 7.9* 2013* 0.5 0.5 1.8 0.83
0* 1006*
A665 0.1829 MMC β 3.25 340 0.763 pl 3. 6 ¯ Mathematical equation: $ \overline{6} $* 4* 450 1.3 0.47 6.9 1.26
Coma 0.023 MMC β 3.44 291 0.75 pl 3. 6 ¯ Mathematical equation: $ \overline{6} $* 2 34 4.7 0.5 4.3 1.14
Hydra A 0.0549 MRC 2β 62 27 0.686 pl 2.77 0.62 87 45.5 0.25 3.6 1.07
0.26 232 0.907
Fornax 0.0049 LRC β 1.07 130 0.7 pl 2.7 1 15 5 1.6 0.2 0.4

Notes. Columns from left to right report: the system name; redshift; classification (GG: Galaxy Group, MMC: Massive Merging Cluster, MRC: Massive Relaxed Cluster, LMC: Low-mass Merging Cluster, LRC: Low-mass Relaxed Cluster); the assumed density model (β for a single β-model, 2β for a sum of two β-models, dβ for a sum in quadrature, and univ. for the universal profile introduced by Ghirardini et al. 2019); central thermal density n0; core radius rc; and the β index. Additional parameters are provided in the subsequent row where necessary; specifically, for the universal model, the second n0, β, and rc values correspond to α, ϵ, and Rs, respectively. The table also lists: the magnetic field power spectrum model (’pl’ for power law, ’bpl’ for broken power law, and ’df’ for the model proposed by Domínguez-Fernández et al. 2019); the spectral slope ζ; and the Λmin and Λmax scales. For the ’df’ profile, ζ and the second Λmin correspond to parameters B and C, respectively. Radial profile parameters for the magnetic field (B0 and η) are also included. We note that 3C449 is the only case with a broken profile, characterized by η = 0 at radial distances exceeding 16 kpc. Finally, we report the mass and radius computed within R500 (Piffaretti et al. 2011). Parameters assumed a priori in the original modelling are highlighted with an asterisk. All spatial scales, densities, and magnetic field strengths have been rescaled to the cosmology adopted in this work. For 3C31 and Hydra A, we rescaled the reported Brms values according to Brms = 0.42B0 (Laing et al. 2008). For A2255, we refer to the modelling based on radio galaxy RMs (Govoni et al. 2006). In the case of 3C31, we used results obtained without cavity modelling, as these features were not detected. For both A2345 and A2142, B0 was extrapolated from the average magnetic field strength within a 1 Mpc3 volume reported by the authors, assuming the radial profile parameters (η, ne) derived for the system. Central temperatures for A665 and A523 were taken from Norseth et al. (2025) and Cova et al. (2019), respectively. Literature data are sourced from: Guidetti et al. (2010) (3C449), Laing et al. (2008) (3C31, Hydra A), Murgia et al. (2004) (A119), Govoni et al. (2017) (A194),Pagliotta et al. (2025) (A2142), Vacca et al. (2012) (A2199), Govoni et al. (2006) (A2255), Stuardi et al. (2021) (A2345), Guidetti et al. (2008) (A2382), Vogt & Enßlin (2003) (A2634 and A400), Khadir et al. (2026) (A3581), Vacca et al. (2022) (A523), Vacca et al. (2010) (A665), Bonafede et al. (2010) (Coma Cluster), and this work (Fornax cluster).

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