Results 21 to 30 of about 441,564 (317)
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.
Allen, B. +4 more
arxiv +3 more sources
Nuclear Physics Meets the Sources of the Ultra-High Energy Cosmic Rays [PDF]
Scientific Reports, 2017 The determination of the injection composition of cosmic ray nuclei within astrophysical sources requires sufficiently accurate descriptions of the source physics and the propagation – apart from controlling astrophysical uncertainties.
Denise Boncioli +2 more
doaj +2 more sources
Testing Isotropy of Cosmic Microwave Background Radiation [PDF]
, 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 ...
Jain, Pankaj +3 more
core +3 more sources
arXiv, 1997 A short review of the measured spectrum of the Cosmic Microwave Background Radiation (CMBR) and implications. Extensions of the Kompaneets equation and Sunyaev-Zel'dovich effect are given.
Stebbins, Albert
arxiv +4 more sources
Conformal Invariance and Cosmic Background Radiation [PDF]
Physical Review Letters, 1996 The spectrum and statistics of the cosmic microwave background radiation (CMBR) are investigated under the hypothesis that scale invariance of the primordial density fluctuations should be promoted to full conformal invariance.
A. A. Starobinsky +19 more
core +3 more sources
Measurements of the cosmic background radiation [PDF]
Annual Review of Astronomy and Astrophysics, 1980 Measurements of the attributes of the 2.7-K microwave background radiation (CBR) are reviewed, with emphasis on the analytic phase of CBR studies. Methods for the direct measurement of the CBR spectrum are discussed.
R. Weiss
semanticscholar +3 more sources
Spectrum of the cosmic background radiation [PDF]
Physical Review Letters, 1979 New measurements of the emission spectrum of the night sky have been made in the frequency range from 1.7 to 40 ${\mathrm{cm}}^{\ensuremath{-}1}$ using a fully calibrated, liquid-helium-cooled, balloon-borne spectrophotometer.
D. Woody, P. Richards
semanticscholar +3 more sources
Kolmogorov Complexity, Cosmic Background Radiation and Irreversibility [PDF]
The Physics of Communication, 2003 We discuss the algorithmic information approach to the analysis of the observational data on the Universe. Kolmogorov complexity is proposed as a descriptor of the Cosmic Microwave Background (CMB) radiation maps.
Gurzadyan, V. G.
core +5 more sources
Scaling properties of the cosmic background plasma and radiation [PDF]
Int.J.Mod.Phys. D12 (2003) 509-517, 2003 Scaling properties of the cosmic microwave background (CMB) radiation are studied using satellite (COBE-DMR maps), balloon-borne and ground-based (combined QMASK map) data. Quantitative consistency is found between the multiscaling properties of the COBE-DMR and QMASK CMB maps.
arxiv +5 more sources
Impact of the cosmic background radiation on the initial mass function of metal-poor stars [PDF]
Monthly notices of the Royal Astronomical Society, 2022 We study star cluster formation at low metallicities of Z/Z⊙ = 10−4–10−1 using three-dimensional hydrodynamics simulations. Particular emphasis is put on how the stellar mass distribution is affected by the cosmic microwave background radiation (CMB ...
Sunmyon Chon +3 more
semanticscholar +1 more source