Fig. 1.
Left panel: Effelsberg total power emission of NGC 4631 at 4.85 GHz with apparent magnetic field orientation (line segments of equal length). Right panel: spectral index distribution in NGC 4631 derived from Effelsberg data at 4.85 and 8.35 GHz (from Mora & Krause 2013). All images have have an angular resolution of 163″ FWHM. The contours correspond to the Effelsberg 4.85 GHz total intensity at 584 μJy beam−1 × (8, 12, 24, 48, 96, 192, 288). The background radio galaxy to the southwest of NGC 4631 has been marked with a black X-symbol (see Appendix A).
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