Results 111 to 120 of about 60,199 (278)

Cosmic anisotropy with reduced relativistic gas

European Physical Journal C: Particles and Fields, 2018
The dynamics of cosmological anisotropies is investigated for Bianchi type I universe filled by a relativistic matter represented by the reduced relativistic gas model (RRG), with equation of state interpolating between radiation and matter.
Simpliciano Castardelli dos Reis, Ilya L. Shapiro   +1 more
doaj   +1 more source

On the Possibility of Driving the Electron Flux Probabilistic Models by the AE Index

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract We present the new probabilistic model of the electron fluxes designed to assess the risks of the spacecraft surface charging for missions with near‐equatorial orbits in the inner magnetosphere. It is a second model developed within a frame of the European Space Agency's activity “Plasma Environment Modeling in the Earth's Magnetosphere ...
S. Dubyagin, N. Ganushkina, A. Sicard, J.‐C. Matéo‐Vélez, L. Monnin, D. Heynderickx, P. Jiggens, G. Deprez, F. Cipriani   +8 more
wiley   +1 more source

Decoherence of Cosmological Perturbations from Boundary Terms and the Non-Classicality of Gravity [PDF]

, 2022
Chon Man Sou, Duc Huy Tran, Yi Wang
openalex   +1 more source

Signal Processing for the Cluster Wideband Data Burst Mode

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract The Wideband Data instrument is part of the Cluster spacecraft Wave Experiment Consortium. Its primary data path is a direct connection to the spacecraft data handling system providing real time downlink to the ground stations of the Deep Space Network and Panska Ves Observatory.
K. H. Yearby, S. N. Walker, J. S. Pickett   +2 more
wiley   +1 more source

Signature of f(R) gravity via Lemaître–Tolman–Bondi inhomogeneous perturbations

European Physical Journal C: Particles and Fields
We analyze inhomogeneous cosmological models in the local Universe, described by the Lemaître–Tolman–Bondi (LTB) metric and developed using linear perturbation theory on a homogeneous and isotropic Universe background. Focusing on the different evolution
Tiziano Schiavone, Giovanni Montani
doaj   +1 more source

TASI Lectures on Cosmological Perturbations

, 2013
We present a self-contained summary of the theory of linear cosmological perturbations. We emphasize the effect of the six parameters of the minimal cosmological model, first, on the spectrum of Cosmic Microwave Background temperature anisotropies, and ...
Lesgourgues, Julien
core   +1 more source

A note on the semiclassicality of cosmological perturbations

, 2016
Moving from the consideration that matter fields must be treated in terms of their fundamental quantum counterparts, we show straightforward arguments, within the framework of ordinary quantum mechanics and quantum field theory, in order to convince ...
Dona, Pietro, Marciano, Antonino
core   +1 more source

Cosmological teleparallel perturbations

Journal of Cosmology and Astroparticle Physics
Abstract There has been growing interest in f(ℚ) gravity, which has led to significant advancements in the field. However, it is important to note that most studies in this area were based on the coincident gauge, thus overlooking the impact of the connection degrees of freedom.
Heisenberg, Lavinia, Hohmann, Manuel, Kuhn, Simon   +2 more
openaire   +3 more sources

Differentiating Plumes and Local Torus Segments of Enceladus

Journal of Geophysical Research: Space Physics, Volume 131, Issue 2, February 2026.
Abstract Enceladus's south polar plumes and their surrounding torus segments (local plasma regions formed by plume material diffusion) are key to understanding its magnetospheric interaction; however, clear observational criteria to distinguish them remain lacking.
Shangchun Teng, Zhonghua Yao, Jian Zhang, Tianshu Qin, Fiona Wai Chung Law, Jinyan Zhao, Ruilong Guo   +6 more
wiley   +1 more source

Decadal‐Scale In Situ Scanning of a Stalagmite From Southwest China Reveals Blake Geomagnetic Excursion Structure

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract We present a decadal‐scale paleomagnetic analysis of a stalagmite collected from Shuixi Cave, southwest China, spanning 89−123 ka. Our findings include: (a) Magnetite is the dominant magnetic mineral, and paleomagnetic directions can be obtained via demagnetization; (b) Magnetic scanning at 0.1‐mm resolution captures key magnetic features ...
Zhongshan Shen, Youwei Li, Liang Yi, Huafeng Qin, Jian Wang, Yibing Li, Hai Cheng   +6 more
wiley   +1 more source