Results 1 to 10 of about 257,498 (300)
Revisiting cosmic microwave background radiation using blackbody radiation inversion. [PDF]
Sci Rep, 2021 Blackbody radiation inversion is a mathematical process for the determination of probability distribution of temperature from measured radiated power spectrum.
Konar K, Bose K, Paul RK.
europepmc +7 more sources
Testing isotropy of cosmic microwave background radiation [PDF]
Monthly Notices of the Royal Astronomical Society, 2007 We introduce new symmetry-based methods to test for isotropy in cosmic microwave background radiation. Each angular multipole is factored into unique products of power eigenvectors, related multipoles and singular values that provide 2 new rotationally ...
P. Samal +3 more
semanticscholar +11 more sources
Cosmic Microwave Background Radiation Anisotropy Induced by Cosmic Strings [PDF]
arXiv, 1994 We report on a current investigation of the anisotropy pattern induced by cosmic strings on the cosmic microwave background radiation (MBR). We have numerically evolved a network of cosmic strings from a redshift of $Z = 100$ to the present and calculated the anisotropies which they induce.
B. Allen +4 more
arxiv +8 more sources
Physics of the Cosmic Microwave Background Radiation [PDF]
Astrophys.Space Sci.Proc. 45 (2016) 3-39, 2015 The cosmic microwave background (CMB) radiation provides a remarkable window onto the early universe, revealing its composition and structure. In these lectures we review and discuss the physics underlying the main features of the CMB.
D. Wands, O. F. Piattella, L. Casarini
semanticscholar +7 more sources
Cosmic Needles versus Cosmic Microwave Background Radiation [PDF]
The Astrophysical Journal, 2003 13 pages, 4 figures; submitted to ...
Aigen Li
core +7 more sources
Anisotropic universes with isotropic cosmic microwave background radiation [PDF]
Class.Quant.Grav. 18 (2001) 5583-5590, 2001 We show the existence of spatially homogeneous but anisotropic cosmological models whose cosmic microwave background temperature is exactly isotropic at one instant of time but whose rate of expansion is highly anisotropic. The existence of these models shows that the observation of a highly isotropic cosmic microwave background temperature cannot ...
W C Lim, Ulf S. Nilsson, J. Wainwright
arxiv +4 more sources
The Cosmic Microwave Background Radiation [PDF]
Phys.Rept. 333 (2000) 245-267, 2000 We summarize the theoretical and observational status of the study of the Cosmic Microwave Background radiation. Its thermodynamic spectrum is a robust prediction of the Hot Big Bang cosmology and has been confirmed observationally. There are now 76 observations of Cosmic Microwave Background anisotropy, which we present in a table with references.
Eric Gawiser, Joseph Silk, Joseph Silk
arxiv +5 more sources
Joint Cosmic Microwave Background and Big Bang Nucleosynthesis Constraints on Light Dark Sectors with Dark Radiation. [PDF]
Physical Review Letters, 2021 Dark sectors provide a compelling theoretical framework for thermally producing sub-GeV dark matter, and motivate an expansive new accelerator and direct-detection experimental program. We demonstrate the power of constraining such dark sectors using the
Cara Giovanetti +3 more
semanticscholar +3 more sources
A flat Universe from high-resolution maps of the cosmic microwave background radiation [PDF]
Nature, 2000 The blackbody radiation left over from the Big Bang has been transformed by the expansion of the Universe into the nearly isotropic 2.73 K cosmic microwave background.
P. Bernardis +35 more
semanticscholar +2 more sources
The cosmic microwave background radiation temperature at a redshift of 2.34 [PDF]
Nature, 2000 The existence of the cosmic microwave background radiation is a fundamental prediction of hot Big Bang cosmology, and its temperature should increase with increasing redshift. At the present time (redshift z = 0), the temperature has been determined with
R. Srianand +3 more
semanticscholar +3 more sources