Relighting the fire in Hickson Compact Group (HCG) 15: Magnetised fossil plasma revealed by the SKA Pathfinders and Precursors

Open Access

Fig. 5.

Integrated radio SED for the galaxies HCG15-A, -C, -D, -E, and -F. Dot-dashed pink line denotes power-law fit to datapoints for the spectrum of HCG15-D, which has a spectral index of $α = + 0 . 26_{- 0.02}^{+ 0.02}$ $\alpha = +0.26^{+0.02}_{-0.02}$ for the main trend trend. The shaded region marks the 1σ uncertainty. Datapoints for HCG15-A, -C, and -F are connected by simple lines as a guide.

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