The Planck field toward the M 82 galaxy in the 70 GHz band. The pixel color gives the temperature excess with respect to the mean CMB temperature in μK. The galactocentric radii of the circles are 15′, 30′ and 1°, respectively. The M 82 galaxy is indicated by the inner ellipse with major and minor axes of 10.73′ and 5.02′, respectively. The analysis presented in Sect. 2 is performed within the quadrants indicated as A1, A2, A3, and A4. The line corresponding to Galactic latitude 40° north is also shown.