Results 11 to 20 of about 51,105 (273)

Fast emulation of anisotropies induced in the cosmic microwave background by cosmic strings

The Open Journal of Astrophysics, 2023
Cosmic strings are linear topological defects that may have been produced during symmetry-breaking phase transitions in the very early Universe. In an expanding Universe the existence of causally separate regions prevents such symmetries from being ...
Matthew A. Price, Matthijs Mars, Matthew M. Docherty, Alessio Spurio Mancini, Augustin Marignier, Jason D. McEwen   +5 more
doaj   +2 more sources

An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys [PDF]

Astrophysical Journal, 2020
We report new measurements of millimeter-wave power spectra in the angular multipole range 2000 ≤ ℓ ≤ 11,000 (angular scales ). By adding 95 and 150 GHz data from the low-noise 500 deg2 SPTpol survey to the SPT-SZ three-frequency 2540 deg2 survey, we ...
C. Reichardt, S. Patil, P. Ade, A. Anderson, J. Austermann, J. Avva, E. Baxter, J. Beall, A. Bender, B. Benson, F. Bianchini, L. Bleem, J. Carlstrom, C. Chang, P. Chaubal, H. Chiang, T. Chou, R. Citron, C. C. Moran, T. Crawford, A. Crites, T. Haan, M. Dobbs, W. Everett, J. Gallicchio, E. George, A. Gilbert, N. Gupta, N. Halverson, N. Harrington, J. Henning, G. Hilton, G. Holder, W. Holzapfel, J. Hrubeš, Norden E. Huang, J. Hubmayr, K. Irwin, L. Knox, Adrian T. Lee, Dale Li, A. Lowitz, D. Luong-Van, J. McMahon, J. Mehl, S. Meyer, M. Millea, L. Mocanu, J. Mohr, J. Montgomery, A. Nadolski, T. Natoli, J. Nibarger, G. Noble, V. Novosad, Y. Omori, S. Padin, C. Pryke, J. Ruhl, B. Saliwanchik, J. Sayre, K. Schaffer, E. Shirokoff, C. Sievers, G. Smecher, H. Spieler, Z. Staniszewski, A. Stark, C. Tucker, K. Vanderlinde, T. Veach, J. Vieira, Gensheng Wang, N. Whitehorn, R. Williamson, W. L. K. Wu, V. Yefremenko   +76 more
semanticscholar   +1 more source

Cosmic microwave background theory. [PDF]

Proc Natl Acad Sci U S A, 1998
A long-standing goal of theorists has been to constrain cosmological parameters that define the structure formation theory from cosmic microwave background (CMB) anisotropy experiments and large-scale structure (LSS) observations. The status and future promise of this enterprise is described.
Bond JR.
europepmc   +4 more sources

Balloon-borne Cosmic Microwave Background experiments [PDF]

EPJ Web of Conferences, 2019
Stratospheric balloon experiments play a unique role in current Cosmic Microwave Background (CMB) studies. CMB research has entered a precision phase, harvesting the detailed properties of its anisotropy, polarization and spectrum, at incredible ...
Masi Silvia, Coppolecchia A., Battistelli E., de Bernardis P., Columbro F., D’Alessandro G., Lamagna L., Paiella A., Piacentini F., Presta G.   +9 more
doaj   +1 more source

Constraints on primordial gravitational waves from the cosmic microwave background [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
Searches for primordial gravitational waves have resulted in constraints in a large frequency range from a variety of sources. The standard Cosmic Microwave Background (CMB) technique is to parameterise the tensor power spectrum in terms of the tensor-to-
Thomas J. Clarke, E. Copeland, A. Moss
semanticscholar   +1 more source

Cosmic microwave background images [PDF]

IEEE Signal Processing Magazine, 2010
We aim to present a tutorial on the detection, parameter estimation and statistical analysis of compact sources (far galaxies, galaxy clusters and Galactic dense emission regions) in cosmic microwave background observations. The topic is of great relevance for current and future cosmic microwave background missions because the presence of compact ...
Herranz, Diego, Vielva, Patricio
openaire   +4 more sources

The Boltzmann equation and Cosmic Microwave Background

Revista de Investigación de Física, 2023
Observations on the anisotropies of the Cosmic Microwave Background (CMB) have become a fundamental tool in Cosmology. We present a brief description of the mformalism necessary to understand the evolution of the anisotropies, and how their power ...
Mississippi Valenzuela
doaj   +1 more source

Self-interacting neutrinos, the Hubble parameter tension, and the cosmic microwave background [PDF]

Physical Review D, 2020
We perform a comprehensive study of cosmological constraints on non-standard neutrino selfinteractions using cosmic microwave background (CMB) and baryon acoustic oscillation data.
T. Brinckmann, Jae Hyeok Chang, M. Loverde   +2 more
semanticscholar   +1 more source

The Atacama Cosmology Telescope: a measurement of the Cosmic Microwave Background power spectra at 98 and 150 GHz [PDF]

Journal of Cosmology and Astroparticle Physics, 2020
We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg2 of the 2013–2016 survey, which covers >15000 deg2 at 98 and 150 GHz.
Steve K. Choi, M. Hasselfield, S. Ho, B. Koopman, M. Lungu, M. Abitbol, G. Addison, P. Ade, S. Aiola, D. Alonso, M. Amiri, S. Amodeo, Elio Angile, J. Austermann, T. Baildon, N. Battaglia, J. Beall, R. Bean, D. Becker, J. Bond, S. M. Bruno, E. Calabrese, V. Calafut, L. Campusano, Felipe Carrero, G. Chesmore, Hsiao-mei Cho, S. Clark, N. Cothard, D. Crichton, K. Crowley, O. Darwish, R. Datta, E. Denison, M. Devlin, C. Duell, S. Duff, A. Duivenvoorden, J. Dunkley, R. Dunner, T. Essinger-Hileman, M. Fankhanel, S. Ferraro, A. Fox, Brittany Fuzia, P. Gallardo, V. Gluscevic, J. Golec, E. Grace, M. Gralla, Y. Guan, K. Hall, M. Halpern, Dongwon Han, P. Hargrave, S. Henderson, B. Hensley, J. Hill, G. Hilton, M. Hilton, A. Hincks, R. Hlovzek, J. Hubmayr, K. Huffenberger, J. Hughes, L. Infante, K. Irwin, Rebecca Jackson, J. Klein, K. Knowles, A. Kosowsky, Vincent Lakey, Dale Li, Yaqiong Li, Zack Li, M. Lokken, T. Louis, A. MacInnis, M. Madhavacheril, F. Maldonado, M. Mallaby-Kay, D. Marsden, L. Maurin, J. McMahon, F. Menanteau, K. Moodley, Tim Morton, S. Naess, T. Namikawa, F. Nati, L. Newburgh, J. Nibarger, A. Nicola, M. Niemack, M. Nolta, John Orlowski-Sherer, L. Page, C. Pappas, B. Partridge, P. Phakathi, H. Prince, R. Puddu, F. Qu, J. Rivera, N. Robertson, F. Rojas, M. Salatino, E. Schaan, A. Schillaci, B. Schmitt, N. Sehgal, B. Sherwin, C. Sierra, J. Sievers, C. Sifón, P. Sikhosana, S. Simon, D. Spergel, S. Staggs, J. Stevens, E. Storer, D. Sunder, E. Switzer, B. Thorne, R. Thornton, H. Trac, J. Treu, C. Tucker, L. Vale, A. V. Engelen, J. Lanen, E. Vavagiakis, K. Wagoner, Yuhan Wang, J. Ward, Edward J. Wollack, Zhilei Xu, Fernando Zago, N. Zhu   +138 more
semanticscholar   +1 more source

Microwaves Are Everywhere “CMB: Hiding in Plain Sight”

IEEE Journal of Microwaves, 2021
This article is the first in a continuing series of general interest papers on the applications of microwaves in areas of science and technology that might not be evident to the casual observer.
Peter H. Siegel
doaj   +1 more source