Microwave background bispectrum. II. A probe of the low redshift universe
Microwave background bispectrum. II. A probe of the low redshift universe
Gravitational fluctuations along the line of sight from the surface of last scatter to the observer distort the microwave background in several related ways: The fluctuations deflect the photon path (gravitational lensing), the decay of the gravitational potential produces additional fluctuations (ISW effect) and scattering off of hot gas in …