On Two Low Harmonics of CMB Correlation Maps
We have analyzed two powerful correlation harmonics (ℓ = 3 and ℓ = 6) found in the correlation of the ILC WMAP signal with the submillimeter and infrared range data from the FSC IRAS and Planck catalogs. The mode phases of these multipoles were computed. In the spots we have found in the harmonics, the source counts were made from the NVSS, FIRST, FSC IRAS and Planck surveys. The correlation harmonic phases are close at different observational frequencies both for ℓ = 3 and ℓ = 6. We do not exclude that a part of the weak signal in the ILC WMAP data, manifested in the strong correlation properties of the investigated multipoles may be due to extragalactic radiation sources.