Results 31 to 40 of about 128,427 (267)

Room for New Physics in the Rayleigh-Jeans Tail of the Cosmic Microwave Background. [PDF]

Physical Review Letters, 2018
We show that, despite stringent constraints on the shape of the main part of the cosmic microwave background (CMB) spectrum, there is considerable room for its modification within its Rayleigh-Jeans (RJ) end, ω≪T_{CMB}.
M. Pospelov, J. Pradler, J. Ruderman, A. Urbano   +3 more
semanticscholar   +1 more source

Cosmic Needles versus Cosmic Microwave Background Radiation [PDF]

, 2002
It has been suggested by a number of authors that the 2.7K cosmic microwave background (CMB) radiation might have arisen from the radiation from Population III objects thermalized by conducting cosmic graphite/iron needle-shaped dust.
Aguirre A. N., Aigen Li, Chlewicki G., Greenberg J. M., Hoyle F., Hoyle F., Lind A. C., Moravec T. J., Narlikar J. V., Ordal M. A., Rana N. C., Sivaram C., Wickramasinghe N. C., Wickramasinghe N. C., Wickramasinghe N. C., Wickramasinghe N. C., Wickramasinghe N. C.   +16 more
core   +2 more sources

Frequency–Redshift Relation of the Cosmic Microwave Background

Astronomy, 2023
We point out that a modified temperature–redshift relation (T-z relation) of the cosmic microwave background (CMB) cannot be deduced by any observational method that appeals to an a priori thermalisation to the CMB temperature T of the excited states in ...
Ralf Hofmann, Janning Meinert
doaj   +1 more source

Measurements of B -mode polarization of the cosmic microwave background from 500 square degrees of SPTpol data [PDF]

Physical Review D, 2019
We report a B-mode power spectrum measurement from the cosmic microwave background (CMB) polarization anisotropy observations made using the SPTpol instrument on the South Pole Telescope.
J. Sayre, J. Sayre, C. Reichardt, J. Henning, P. Ade, A. Anderson, J. Austermann, J. Austermann, J. Avva, J. Beall, A. Bender, B. Benson, B. Benson, F. Bianchini, L. Bleem, J. Carlstrom, C. Chang, C. Chang, P. Chaubal, H. Chiang, H. Chiang, R. Citron, C. C. Moran, T. Crawford, A. Crites, A. Crites, T. Haan, T. Haan, M. Dobbs, M. Dobbs, W. Everett, J. Gallicchio, E. George, E. George, A. Gilbert, N. Gupta, N. Halverson, N. Harrington, G. Hilton, G. Holder, G. Holder, W. Holzapfel, J. Hrubeš, Norden E. Huang, J. Hubmayr, K. Irwin, L. Knox, Adrian T. Lee, Adrian T. Lee, Dale Li, Dale Li, A. Lowitz, J. McMahon, S. Meyer, L. Mocanu, J. Montgomery, A. Nadolski, T. Natoli, T. Natoli, J. Nibarger, G. Noble, V. Novosad, S. Padin, S. Padin, S. Patil, C. Pryke, J. Ruhl, B. Saliwanchik, B. Saliwanchik, K. Schaffer, K. Schaffer, C. Sievers, G. Smecher, A. Stark, C. Tucker, K. Vanderlinde, T. Veach, J. Vieira, Gensheng Wang, N. Whitehorn, W. L. K. Wu, V. Yefremenko   +81 more
semanticscholar   +1 more source

The Cosmic Microwave Background [PDF]

Annales Henri Poincaré, 1989
Plenary talk at TH-2002, UNESCO, Paris, July 22-26, 2002, to be published in Annales Henri Poincar ...
openaire   +6 more sources

Photonic Integrated Circuits for Microwave Astronomy

Inventions, 2023
One of the main objectives of cosmology is the measurement of the Cosmic Microwave Background (CMB) polarization and, in particular, the so-called B-modes, which could demonstrate the existence of the primordial gravitational waves generated at the early
Guillermo Pascual-Cisneros, Francisco J. Casas, Patricio Vielva   +2 more
doaj   +1 more source

Stringent Limit on Primordial Magnetic Fields from the Cosmic Microwave Background Radiation. [PDF]

Physical Review Letters, 2018
Primordial magnetic fields (PMFs), being present before the epoch of cosmic recombination, induce small-scale baryonic density fluctuations. These inhomogeneities lead to an inhomogeneous recombination process that alters the peaks and heights of the ...
K. Jedamzik, A. Saveliev
semanticscholar   +1 more source

Clustering of hotspots in the cosmic microwave background [PDF]

EPJ Web of Conferences, 2019
The physics behind the origin and composition of the Cosmic Microwave Background (CMB) is a well-established topic in the field of Cosmology. Literature on CMB anisotropies reveal consistency with Gaussianity [1], but these were conducted on full multi ...
Low En Zuo Joel, Yang Abel
doaj   +1 more source

Improved Constraints on Cosmology and Foregrounds from BICEP2 and Keck Array Cosmic Microwave Background Data with Inclusion of 95 GHz Band. [PDF]

Physical Review Letters, 2015
We present results from an analysis of all data taken by the BICEP2 and Keck Array cosmic microwave background (CMB) polarization experiments up to and including the 2014 observing season. This includes the first Keck Array observations at 95 GHz.
Keck Array, BICEP2 Collaborations P. A. R. Ade, Z. Ahmed, R. Aikin, K. D. Alexander, D. Barkats, S. Benton, C. Bischoff, J. Bock, R. Bowens-Rubin, J. A. Brevik, I. Buder, E. Bullock, V. Buza, J. Connors, B. Crill, L. Duband, C. Dvorkin, J. Filippini, S. Fliescher, J. Grayson, M. Halpern, S. Harrison, G. Hilton, H. Hui, K. D. Irwin, K. Karkare, E. Karpel, J. Kaufman, B. Keating, S. Kefeli, S. A. Kernasovskiy, J. Kovac, C. Kuo, E. Leitch, M. Lueker, K. Megerian, C. Netterfield, H. Nguyen, R. O’Brient, IV R.W.Ogburn, A. Orlando, C. Pryke, S. Richter, R. Schwarz, C. Sheehy, Z. K. Staniszewski, B. Steinbach, R. Sudiwala, G. Teply, K. Thompson, J. E. Tolan, C. Tucker, A. Turner, A. Vieregg, A. Weber, D. Wiebe, J. Willmert, C. Wong, W. L. K. Wu, K. University, Kipacslac, S. University, Caltech, HarvardCfA, U. Toronto, Nasa Jpl, M. I. O. Astrophysics, Harvard, Sbt Grenoble, U. I. Urbana-Champaign, U. Minnesota, U. Columbia, Nist, Ucsd, KICPChicago, Canadian Institute for Advanced Research, U. Chicago   +77 more
semanticscholar   +1 more source

The cosmic microwave background radiation [PDF]

Physics Reports, 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
openaire   +3 more sources