Results 101 to 110 of about 32,194 (214)

Inflationary models with Gauss–Bonnet coupling in light of ACT observations

European Physical Journal C: Particles and Fields
Recent analyses combining Atacama Cosmology Telescope (ACT) data with other cosmological datasets report a higher scalar spectral index $$n_s$$ n s , creating tension with a wide range of inflationary models.
Yigan Zhu, Qing Gao, Yungui Gong, Zhu Yi
doaj   +1 more source

Scalar perturbation in warm tachyon inflation in LQC in light of Plank and BICEP2

Physics Letters B, 2014
We study warm-tachyon inflationary universe model in the context of the effective field theory of loop quantum cosmology. In slow-roll approximation the primordial perturbation spectrums for this model are calculated.
M.R. Setare, V. Kamali
doaj   +1 more source

Cosmological perturbations in inflationary models with anisotropic space-time scaling in a Lifshitz background [PDF]

, 2013
Mohsen Alishahiha, Hassan Firouzjahi, K. Koyama, Mohammad Hossein Namjoo   +3 more
openalex   +1 more source

Large-Angle Anomalies in the CMB

Advances in Astronomy, 2010
We review the recently found large-scale anomalies in the maps of temperature anisotropies in the cosmic microwave background. These include alignments of the largest modes of CMB anisotropy with each other and with geometry and direction of motion of ...
Craig J. Copi, Dragan Huterer, Dominik J. Schwarz, Glenn D. Starkman   +3 more
doaj   +1 more source

Electromagnetic Conversion into Kinetic and Thermal Energies. [PDF]

Entropy (Basel), 2023
Brandenburg A, Protiti NN.
europepmc   +1 more source

Trans-Planckian problem of inflationary cosmology [PDF]

, 2001
Jérôme Martin, Robert Brandenberger
openalex   +1 more source

100 years of mathematical cosmology: Models, theories and problems, Part B. [PDF]

Philos Trans A Math Phys Eng Sci, 2022
Cotsakis S, Yefremov AP.
europepmc   +1 more source

Inflation based on the Tsallis entropy

European Physical Journal C: Particles and Fields
We study the inflationary scenario in the Tsallis entropy-based cosmology. The Friedmann equations in this setup can be derived by using the first law of thermodynamics.
Zeinab Teimoori, Kazem Rezazadeh, Abasat Rostami   +2 more
doaj   +1 more source

Is Planckian Discreteness Observable in Cosmology?

Universe
A Planck scale inflationary era—in a quantum gravity theory predicting discreteness of quantum geometry at the fundamental scale—produces the scale-invariant spectrum of inhomogeneities with a very small tensor-to-scalar ratio of perturbations and a hot ...
Gabriel R. Bengochea, Gabriel León, Alejandro Perez   +2 more
doaj   +1 more source

Bianchi Type VI Inflationary Cosmological Model with Massive String Source in General Relativity

, 2021
Laxmi Poonia, Sanjay Sharma, Sunil Kumawat   +2 more
openalex   +1 more source