Results 121 to 130 of about 256,877 (297)

Statistical isotropy of the Cosmic Microwave Background [PDF]

, 2003
The breakdown of statistical homogeneity and isotropy of cosmic perturbations is a generic feature of ultra large scale structure of the cosmos, in particular, of non trivial cosmic topology.
Amir Hajian, E Bunn, G F R Ellis, G Starkman, J Levin, J R Bond, M Lachieze-Rey, N J Cornish, P G Ferreira, Tarun Souradeep   +9 more
core   +3 more sources

Full-sky Gravitational Lensing Simulation for Large-area Galaxy Surveys and Cosmic Microwave Background Experiments [PDF]

, 2017
We present 108 full-sky gravitational lensing simulation data sets generated by performing multiple-lens plane ray-tracing through high-resolution cosmological N-body simulations. The data sets include full-sky convergence and shear maps from redshifts z
R. Takahashi, T. Hamana, M. Shirasaki, T. Namikawa, T. Nishimichi, K. Osato, Kosei Shiroyama   +6 more
semanticscholar   +1 more source

Demonstration of Cosmic Microwave Background Delensing Using the Cosmic Infrared Background. [PDF]

Physical Review Letters, 2016
Delensing is an increasingly important technique to reverse the gravitational lensing of the cosmic microwave background (CMB) and thus reveal primordial signals the lensing may obscure. We present a first demonstration of delensing on Planck temperature
P. Larsen, A. Challinor, B. Sherwin, D. Mak   +3 more
semanticscholar   +1 more source

Recent Developments in Degenerate Higher Order Scalar Tensor Theories

Annalen der Physik, Volume 537, Issue 2, February 2025.
Degenerate Higher Order Scalar Tensor theories are reviewed, together with their applications in cosmology and astrophysics. These theories have been applied to build models of the early universe, in the description of the late‐time cosmic acceleration, as well as in astrophysics, including black hole physics. They have the potential to provide answers
Andrei Lazanu
wiley   +1 more source

Aberration of the Cosmic Microwave Background

, 2006
The motion of the solar system barycenter with respect to the cosmic microwave background (CMB) induces a very large apparent dipole component into the CMB brightness map at the 3 mK level. In this Letter we discuss another kinematic effect of our motion
Doran M., Ellis G. F. R., S. Burles, S. Rappaport, Sandri M.   +4 more
core   +1 more source

Cosmic Microwave Background Temperature at Galaxy Clusters [PDF]

, 2002
We have deduced the cosmic microwave background (CMB) temperature in the Coma cluster (A1656, $z=0.0231$), and in A2163 ($z=0.203$) from spectral measurements of the Sunyaev-Zel'dovich (SZ) effect over four passbands at radio and microwave frequencies ...
A. Cooray, A. Melchiorri, E. Palladino, E. S. Battistelli, F. Melchiorri, Fabbri R., G. Savini, L. Lamagna, M. De Petris, M. Shimon, Sunyaev R. A., Sunyaev R. A., Y. Rephaeli   +12 more
core   +4 more sources

Planck intermediate results. LI. Features in the cosmic microwave background temperature power spectrum and shifts in cosmological parameters [PDF]

, 2016
The six parameters of the standard $\Lambda$CDM model have best-fit values derived from the Planck temperature power spectrum that are shifted somewhat from the best-fit values derived from WMAP data.
Planck Collaboration N. Aghanim, Y. Akrami, M. Ashdown, J. Aumont, M. Ballardini, A. Banday, R. B. Barreiro, N. Bartolo, S. Basak, K. Benabed, M. Bersanelli, P. Bielewicz, A. Bonaldi, L. Bonavera, J. Bond, J. Borrill, F. Bouchet, C. Burigana, E. Calabrese, J. Cardoso, A. Challinor, H. Chiang, L. Colombo, C. Combet, B. Crill, A. Curto, F. Cuttaia, P. Bernardis, A. Rosa, G. Zotti, J. Delabrouille, E. D. Valentino, C. Dickinson, J. Diego, O. Dor'e, A. Ducout, X. Dupac, S. Dusini, G. Efstathiou, F. Elsner, T. Ensslin, H. Eriksen, Y. Fantaye, F. Finelli, F. Forastieri, M. Frailis, E. Franceschi, A. Frolov, S. Galeotta, S. Galli, K. Ganga, R. G'enova-Santos, M. Gerbino, J. Gonz'alez-Nuevo, K. M. G'orski, A. Gruppuso, J. Gudmundsson, D. Herranz, E. Hivon, Z. Huang, A. Jaffe, W. Jones, E. Keihanen, R. Keskitalo, K. Kiiveri, J. Kim, T. Kisner, L. Knox, N. Krachmalnicoff, M. Kunz, H. Kurki-Suonio, G. Lagache, J. Lamarre, A. Lasenby, M. Lattanzi, C. Lawrence, M. Jeune, F. Levrier, A. Lewis, P. Lilje, M. Lilley, V. Lindholm, M. L'opez-Caniego, P. Lubin, Y.-Z. Ma, J. Mac'ias-P'erez, G. Maggio, D. Maino, N. Mandolesi, A. Mangilli, M. Maris, P. Martin, E. Mart'inez-Gonz'alez, S. Matarrese, N. Mauri, J. McEwen, P. Meinhold, A. Mennella, M. Migliaccio, M. Millea, M. Miville-Deschênes, D. Molinari, A. Moneti, L. Montier, G. Morgante, A. Moss, A. Narimani, P. Natoli, C. A. Oxborrow, L. Pagano, D. Paoletti, G. Patanchon, L. Patrizii, V. Pettorino, F. Piacentini, L. Polastri, G. Polenta, J. Puget, J. Rachen, B. Racine, M. Reinecke, M. Remazeilles, A. Renzi, M. Rossetti, G. Roudier, J. Rubino-Mart'in, B. Ruiz-Granados, L. Salvati, M. Sandri, M. Savelainen, D. Scott, C. Sirignano, G. Sirri, L. Stanco, A.-S. Suur-Uski, J. Tauber, D. Tavagnacco, M. Tenti, L. Toffolatti, M. Tomasi, M. Tristram, T. Trombetti, J. Valiviita, F. V. Tent, P. Vielva, F. Villa, N. Vittorio, B. Wandelt, I. Wehus, M. White, A. Zacchei, A. Zonca   +151 more
semanticscholar   +1 more source

Fast Solution of Sylvester‐Structured Systems for Spatial Source Separation of the Cosmic Microwave Background

Numerical Linear Algebra with Applications, Volume 32, Issue 1, February 2025.
ABSTRACT Implementation of many statistical methods for large, multivariate data sets requires one to solve a linear system that, depending on the method, is of the dimension of the number of observations or each individual data vector. This is often the limiting factor in scaling the method with data size and complexity.
Dung Pham, Kirk M. Soodhalter, Simon Wilson   +2 more
wiley   +1 more source

Cosmic birefringence fluctuations and cosmic microwave background B-mode polarization

Physics Letters B, 2015
Recently, BICEP2 measurements of the cosmic microwave background (CMB) B-mode polarization has indicated the presence of primordial gravitational waves at degree angular scales, inferring the tensor-to-scalar ratio of r=0.2 and a running scalar spectral ...
Seokcheon Lee, Guo-Chin Liu, Kin-Wang Ng
doaj  

Evidence for cosmic neutrino background form CMB circular polarization [PDF]

, 2014
The primordial anisotropies of the cosmic microwave background are linearly polarized via Compton-scattering. On the other hand, a primordial degree of circular polarization of the Cosmic Microwave Background is not observationally excluded. In this work,
Mohammadi, Rohoollah
core   +2 more sources