Results 71 to 80 of about 21,756 (168)
$\alpha'$-Cosmology: solutions and stability analysis
, 2020 We review O$(d,d)$ Covariant String Cosmology to all orders in $\alpha'$ in the presence of matter and study its solutions. We show that the perturbative analysis for a constant dilaton in the absence of a dilatonic charge does not lead to a time ...
Bernardo, Heliudson +1 more
core +1 more source
Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.Abstract The MIST experiment aims to detect the cosmological 21‐cm signal through sky observations at 25–125 MHz using a wide‐beam antenna. The antenna is mounted above the soil and the beam characteristics are highly dependent on the soil's electrical properties.
I. Hendricksen +15 more
wiley +1 more source
A simultaneous study of dark matter and phase transition: two-scalar scenario
Journal of High Energy Physics, 2019 The simplest extension of the Standard Model by only one real singlet scalar can explain the observed dark matter relic density while giving simultaneously a strongly first-order electroweak phase transition in the early universe. However, after imposing
Karim Ghorbani, Parsa Hossein Ghorbani
doaj +1 more source
The cosmology of minimal varying Lambda theories
, 2019 Inserting a varying Lambda in Einstein's field equations can be made consistent with the Bianchi identities by allowing for torsion, without the need to add scalar field degrees of freedom.
Alexander, Stephon +5 more
core +1 more source
Evolution of Ionospheric Ion Upflow Flux During the April 2023 Geomagnetic Storm
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract We study the impact of the evolving magnetosphere‐ionosphere‐thermosphere system on upward ion fluxes during the 23–24 April 2023 geomagnetic storm. This storm has a “double‐dip” structure where two southward IMF Bz ${\mathrm{B}}_{z}$ periods cause two dips in the SYM‐H index.
Grace Kwon +4 more
wiley +1 more source
Light dark Higgs boson in minimal sub-GeV dark matter scenarios
Journal of High Energy Physics, 2018 Minimal scenarios with light (sub-GeV) dark matter whose relic density is obtained from thermal freeze-out must include new light mediators. In particular, a very well-motivated case is that of a new “dark” massive vector gauge boson mediator.
Luc Darmé +2 more
doaj +1 more source
Predictions for axion couplings from ALP cogenesis
Journal of High Energy Physics, 2021 Adding an axion-like particle (ALP) to the Standard Model, with a field velocity in the early universe, simultaneously explains the observed baryon and dark matter densities.
Raymond T. Co +2 more
doaj +1 more source
Modified Gravity and Dark Energy models Beyond $w(z)$CDM Testable by LSST [PDF]
, 2019 One of the main science goals of the Large Synoptic Survey Telescope (LSST) is to uncover the nature of cosmic acceleration. In the base analysis, possible deviations from the Lambda-Cold-Dark-Matter ($\Lambda$CDM) background evolution will be probed by ...
Baker, Tessa +10 more
core +1 more source
Unveiling the Dynamics of the Universe
, 2016 We explore the dynamics and evolution of the Universe at early and late times, focusing on both dark energy and extended gravity models and their astrophysical and cosmological consequences.
Avelino, Pedro +12 more
core +2 more sources
Fluid Flow at the Top of Jupiter's Dynamo Region
Journal of Geophysical Research: Planets, Volume 130, Issue 12, December 2025.Abstract The magnetic main field (MF) and secular variation (SV) models for Jupiter can be used to gain insights about the internal dynamo and the flow that drives the field. We use two such models computed from Juno observations up to spherical harmonic degrees 16 and 8 for the MF and SV, respectively.
S. Sharan +3 more
wiley +1 more source