Magnetic fields in the Shapley Supercluster core with POSSUM: Challenging model predictions

Open Access

Table 4.

Detected excess in the RM scatter from the SCC, bridge, and clusters subsamples, along with their significance and the total number of sources inside each.

Sample	Sources	$σ_{RM}^{Sample}$ $\sigma^{\mathrm{Sample}}_{\mathrm{RM}}$ [rad/m²]	Significance
SSC	46	30.52 ± 4.55	6.7σ
Bridge	12	25.32 ± 8.48	3.0σ
Clusters	34	27.20 ± 4.97	5.5σ

Notes. The off-target subsample is common for all three cases with a scatter of σ_{off − target} = 12.32 ± 1.54 rad/m².

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