Results 81 to 90 of about 128,427 (267)

Dark Energy with Phantom Crossing and the H₀ Tension

Entropy, 2021
We investigate the possibility of phantom crossing in the dark energy sector and the solution for the Hubble tension between early and late universe observations.
Eleonora Di Valentino, Ankan Mukherjee, Anjan A. Sen   +2 more
doaj   +1 more source

Exploring the Tension between Current Cosmic Microwave Background and Cosmic Shear Data

Symmetry, 2018
This paper provides a snapshot of the formal S 8 ≡ σ 8 Ω m / 0.3 tension between Planck 2015 and the Kilo Degree Survey of450 deg 2 of imaging data (KiDS-450) or the Canada France Hawaii Lensing Survey (CFHTLenS).
E. D. Valentino, S. Bridle
semanticscholar   +1 more source

Hybrid loop quantum cosmology and predictions for the cosmic microwave background [PDF]

, 2017
We investigate the consequences of the hybrid quantization approach for primordial perturbations in loop quantum cosmology, obtaining predictions for the cosmic microwave background and comparing them with data collected by the Planck mission.
Laura Castell'o Gomar, D. M. Blas, G. A. M. Marug'an, J. Olmedo   +3 more
semanticscholar   +1 more source

Evading the pulsar constraints on the cosmic string tension in supergravity inflation

, 2012
The cosmic string is a useful probe of the early Universe and may give us a clue to physics at high energy scales where any artificial particle accelerators cannot reach.
, , A. Vilenkin, C. Ringeval, F.A. Jenet ., J. Dunkley ., J. Rocher, J. Urrestilla, Jun'ichi Yokoyama, K. Nakayama, Kohei Kamada, L. Lorenz, M. Hindmarsh, P. Amaro-Seoane ., P. Binetruy, Planck collaboration, R. Jeannerot, R. Jeannerot, R. van Haasteren ., R.A. Battye, S. Kawamura ., T. Kibble, WMAP collaboration, Yuhei Miyamoto   +23 more
core   +1 more source

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

A Measurement of Atmospheric Circular Polarization with POLARBEAR

The Astrophysical Journal
At millimeter wavelengths, the atmospheric emission is circularly polarized owing to the Zeeman splitting of molecular oxygen by the Earth's magnetic field.
Takuro Fujino, Satoru Takakura, Shahed Shayan Arani, Darcy Barron, Carlo Baccigalupi, Yuji Chinone, Josquin Errard, Giulio Fabbian, Chang Feng, Nils W. Halverson, Masaya Hasegawa, Masashi Hazumi, Oliver Jeong, Daisuke Kaneko, Brian Keating, Akito Kusaka, Adrian Lee, Tomotake Matsumura, Lucio Piccirillo, Christian L. Reichardt, Kana Sakaguri, Praween Siritanasak, Kyohei Yamada   +22 more
doaj   +1 more source

The Cosmic Microwave Background & Inflation, Then & Now [PDF]

, 2002
Boomerang, Maxima, DASI, CBI and VSA significantly increase the case for accelerated expansion in the early universe (the inflationary paradigm) and at the current epoch (dark energy dominance), especially when combined with data on high redshift ...
Bond, J. R., Contaldi, C. R., Mason, B. S., Myers, S. T., Pearson, T. J., Pen, U. -L., Pogosyan, D., Prunet, S., Readhead, A. C. S., Sievers, J. L.   +9 more
core   +2 more sources

Impact of Interacting Parameters on Dark Matter in an Interacting Dark Energy Model

The Astrophysical Journal Supplement Series
This paper investigates a dark energy model within the Friedmann–Lemaître–Robertson–Walker cosmological framework, considering both interacting and noninteracting scenarios.
Himanshu Chaudhary, Ritika Nagpal, S. K. J. Pacif, G. Mustafa   +3 more
doaj   +1 more source

Improved constraints on lepton asymmetry from the cosmic microwave background [PDF]

, 2017
A cosmic lepton asymmetry affects the primordial helium abundance and the expansion rate of the early Universe. Both of these effects have an impact on the anisotropies of the cosmic microwave background (CMB).
Isabel M. Oldengott, D. Schwarz
semanticscholar   +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