Azimuthal offsets in spiral arms of nearby galaxies

Open Access

Fig. 4.

Histograms showing the distribution of the mean CO-Hα and CO-NIR offsets across the whole galaxy sample. Each histogram includes one mean offset per galaxy, computed by averaging all measured offsets for all radii (top), the inner half (middle, $R < (R_{\min}^{CO} + R_{\max}^{CO}) / 2$ $R < (R_{\mathrm{min}}^{\mathrm{CO}} + R_{\mathrm{max}}^{\mathrm{CO}})/2$ ), and the outer half (bottom, $R \geq (R_{\min}^{CO} + R_{\max}^{CO}) / 2$ $R \ge (R_{\mathrm{min}}^{\mathrm{CO}} + R_{\mathrm{max}}^{\mathrm{CO}})/2$ )).

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