Planck 2018 results
Open Access

Fig. 20.


Ratio between maps at other frequencies and the 857 GHz map. At 100 and 143 GHz, low-frequency foregrounds (synchrotron, free-free) have been removed before taking the ratio. The CMB anisotropies have been removed for the 100–353 GHz maps, as described in the text. These ratios are thus indicative of the Galactic dust SED variations.

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