Fig. 20.

Variation of polarized intensity PI at λ3.6 cm (in μJy beam−1, in loge scale) at HPBW in four quadrants of M 31 with aspect angle sin βord (in loge scale) of the line of sight towards a spiral field with a pitch angle of ξord = −15° for the radial ring between 9 kpc and 11 kpc. The lines show weighted fits through the data points. The fit results are given in Table 5.
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