Astronomy and Astrophysics – Astrophysics
Scientific paper
2007-06-29
Phys.Rev.D76:123010,2007
Astronomy and Astrophysics
Astrophysics
23 pages, 11 figures; references added; one figure dropped and minor changes to match published version. For high-resolution v
Scientific paper
10.1103/PhysRevD.76.123010
We discuss the time dependence and future of the Cosmic Microwave Background (CMB) in the context of the standard cosmological model, in which we are now entering a state of endless accelerated expansion. The mean temperature will simply decrease until it reaches the effective temperature of the de Sitter vacuum, while the dipole will oscillate as the Sun orbits the Galaxy. However, the higher CMB multipoles have a richer phenomenology. The CMB anisotropy power spectrum will for the most part simply project to smaller scales, as the comoving distance to last scattering increases, and we derive a scaling relation that describes this behaviour. However, there will also be a dramatic increase in the integrated Sachs-Wolfe contribution at low multipoles. We also discuss the effects of tensor modes and optical depth due to Thomson scattering. We introduce a correlation function relating the sky maps at two times and the closely related power spectrum of the difference map. We compute the evolution both analytically and numerically, and present simulated future sky maps.
Moss Adam
Scott Daniel
Zibin James Peter
No associations
LandOfFree
The Evolution of the Cosmic Microwave Background does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Evolution of the Cosmic Microwave Background, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Evolution of the Cosmic Microwave Background will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-682331