Results 251 to 260 of about 257,498 (300)
Some of the next articles are maybe not open access.

The cosmic microwave background radiation and cosmology

Classical and Quantum Gravity, 1994
I review recent observational results on the fundamental properties of the cosmic microwave-background radiation, with special emphasis on the findings of the COBE satellite. These include the present temperature of the radiation, , and the first convincing detection of angular variations in its intensity, at a level on scales .
openaire   +2 more sources

Constraining neutrino physics with big bang nucleosynthesis and cosmic microwave background radiation

, 2001
We perform a likelihood analysis of the recent results on the anisotropy of cosmic microwave background radiation from the BOOMERanG and DASI experiments to show that they single out an effective number of neutrinos in good agreement with standard big ...
S. Hansen   +4 more
semanticscholar   +1 more source

Signatures of kinetic and magnetic helicity in the cosmic microwave background radiation

, 2002
$P$ and $\mathrm{CP}$ violation in cosmology can be manifested as large-scale helical velocity flows in the ambient plasma and as primordial helical magnetic fields.
L. Pogosian, T. Vachaspati, S. Winitzki
semanticscholar   +1 more source

Observations of the Isotropy of the Cosmic Microwave Background Radiation

Annual Review of Astronomy and Astrophysics, 1992
Over the past decade the anisotropy of the microwave background radiation has emerged as a field of fundamental importance to astrophysics due to its significance in theories of galaxy formation and in the quest for the physical origin of fluctuations. The history of the development of this subject may be divided into three phases. In the first phase,
Readhead, Anthony C. S.   +1 more
openaire   +3 more sources

Calculation of Cosmic microwave background radiation parameters using COBE/FIRAS dataset

Experimental astronomy (Print), 2023
Somita Dhal   +3 more
semanticscholar   +1 more source

Precision of slow-roll predictions for the cosmic microwave background radiation anisotropies

, 1999
Inflationary predictions for the anisotropy of the cosmic microwave background radiation are often based on the slow-roll approximation. We study the precision with which the multipole moments of the temperature two-point correlation function can be ...
Jérôme Martin, D. Schwarz
semanticscholar   +1 more source

Measurement of Cosmic Microwave Background Radiation

IEEE Transactions on Microwave Theory and Techniques, 1968
The techniques associated with the measurement of antenna temperature at microwave frequencies are discussed. A number of experiments designed to measure cosmic microwave background radiation are described and their results compared. These results give a very good fit to a 3/spl deg/K black body curve between 1.4 and 35 GHz.
openaire   +2 more sources

The dipole anisotropy of the cosmic microwave background radiation

New Astronomy Reviews, 2002
Abstract We review the prediction, discovery and precise measurements of CMB Dipole Anisotropy, a field in which Dennis Sciama has provided important initial insight.
Bianca Melchiorri   +2 more
openaire   +2 more sources

History of the Discovery of the Cosmic Microwave Background Radiation [PDF]

open access: possiblePhysica Scripta, 1980
Radio astronomy has added greatly to our understanding of the structure and dynamics of the universe. The cosmic microwave background radiation, considered a relic of the explosion at the beginning of the universe some 18 billion years ago, is one of the most powerful aids in determining these features of the universe. This paper is about the discovery
openaire   +1 more source

Ripples in the Cosmic Microwave Background Radiation

2016
The Cosmic Microwave Background Explorer satellite (COBE) of NASA, launched in 1989, measured with unprecedented precision the intensity of the cosmic microwave background radiation (CMB) at many wavelengths and in all directions over the sky. The spatial resolution (sharpness) of the microwave optics in the satellite was 7°—14 times the diameter of ...
openaire   +2 more sources

Home - About - Disclaimer - Privacy