Cosmic microwave background - Wikipedia
The cosmic microwave background (CMB, CMBR), or relic radiation, is microwave radiation that fills all space in the observable universe. With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
Cosmic Microwave Background Anisotropy - University of …
2003年9月5日 · The anisotropy of the cosmic microwave background (CMB) consists of the small temperature fluctuations in the blackbody radiation left over from the Big Bang. The average temperature of this radiation is 2.725 K as measured by …
Abstract. The tremendous experimental progress in cosmic microwave background (CMB) temperature and polarization anisotropy studies over the last few years has helped establish a standard paradigm for cosmology at intermediate epochs and has simultaneously raised questions regarding the physical processes at the two opposite
Anisotropies in the cosmic microwave background (CMB) encode information about the evolution and development of the universe. Quality observations of CMB anisotropies can provide a very strong test of cosmological models and provide high precision determination of major cosmological parameters.
3. CMB ANISOTROPY - California Institute of Technology
The temperature anisotropies of the CMB detected by COBE are believed to result from inhomogeneities in the distribution of matter at the epoch of recombination. Because Compton scattering is an isotropic process in the electron rest frame, any primordial anisotropies (as opposed to inhomogeneities) should have been smoothed out before decoupling.
27: Cosmic Microwave Background Anisotropies - Physics …
The power spectrum of the CMB refers to spatial wavelength of fluctuations in the temperature of the CMB across the sky. We can do the same type of analysis with a map of the cosmic microwave background that we did with the Pacific Ocean.
Introduction to temperature anisotropies of Cosmic Microwave Background ...
2014年6月11日 · Since its serendipitous discovery, Cosmic Microwave Background (CMB) radiation has been recognized as the most important probe of Big Bang cosmology. This review focuses on temperature anisotropies of CMB which make it …
[1210.6008] CMB anisotropy science: a review - arXiv.org
2012年10月22日 · The cosmic microwave background (CMB) provides us with our most direct observational window to the early universe. Observations of the temperature and polarization anisotropies in the CMB have played a critical role in defining the …
These notes present a simplified computation of cosmic microwave background anisotropy induced by primeval gravitational potential or entropy fluctuations. The basic treatment is equivalent to the calculation of anisotropy on large angular scales presented first by Sachs & Wolfe (1967). The discussion here goes beyond the Sachs-Wolfe ...
CMB anisotropies beyond the power spectrum and discuss possible sources of non-Gaussianity, inhomogeneity and anisotropy in their distribution on the celestial sphere.