Hey thanks this actually really helps me think about it betterkimbyd said:The monopole is just the average temperature of the CMB. The dipole is dominated by our motion with respect to the CMB: the CMB gets blue-shifted in the direction of our motion, and redshifted opposite to our motion.
The higher multipoles are all from primordial variations in temperature from place to place in the early universe.
A cosmological monopole is a hypothetical particle that is predicted to exist in the universe based on certain theories of particle physics and cosmology. It is thought to be a type of topological defect that formed during the early expansion of the universe.
Cosmological monopoles are different from magnetic monopoles, which are predicted by certain theories of electromagnetism. While magnetic monopoles have a single magnetic pole, cosmological monopoles are topological defects in the fabric of space-time.
A cosmological dipole is a variation in the cosmic microwave background radiation (CMB) that is thought to be caused by the relative motion between the Earth and the rest of the universe. This dipole is used to measure the velocity of the Earth with respect to the CMB frame of reference.
Both cosmological monopoles and dipoles are predicted by certain theories that attempt to explain the origins of the universe, such as the Big Bang theory. These theories suggest that these particles and variations in the CMB were formed during the rapid expansion of the universe after the Big Bang.
As of now, there is no direct evidence for the existence of cosmological monopoles or dipoles. However, scientists continue to search for these particles and variations in the CMB through various experiments and observations. So far, these efforts have not yielded any conclusive results.