Results 11 to 20 of about 49,997 (277)

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

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

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

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

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

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

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

Cosmic microwave background bounds on primordial black holes including dark matter halo accretion [PDF]

, 2020
Even if massive ($10\,M_\odot \lesssim M \lesssim 10^4 M_\odot$) primordial black holes (PBHs) can only account for a small fraction of the dark matter (DM) in the universe, they may still be responsible for a sizable fraction of the coalescence events ...
P. Serpico, V. Poulin, Derek Inman, K. Kohri   +3 more
semanticscholar   +1 more source

Topology and the cosmic microwave background [PDF]

Physics Reports, 2002
Hilarioulsy forgot to remove comments to myself in previous version. Reference added.
Janna Levin, Janna Levin
openaire   +5 more sources

The Cosmic Microwave Background Spectrum from the Full COBE FIRAS Data Set [PDF]

, 1996
We have refined the analysis of the data from the FIRAS (Far-InfraRed Absolute Spectrophotometer) on board the COBE (COsmic Background Explorer). The FIRAS measures the difference between the cosmic microwave background and a precise blackbody spectrum ...
D. Fixsen, E. Cheng, J. Gales, J. Mather, R. Shafer, E. L. Wright   +5 more
semanticscholar   +1 more source