After subtracting the mean, the motion-induced dipole and galactic foregrounds, intrinsic Cosmic microwave background anisotropy appears as angular hot and cold patches, typically at the fractional scale. These spatial temperature fluctuations encode early density and velocity structure. The displayed patch pattern is illustrative, with no claim to reproduce an observed sky map.
Figure 1.
Schematic microwave components: Galactic dust, a kinematic dipole and intrinsic anisotropy, using separate colour scales
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