Results 131 to 140 of about 60,199 (278)
Local Limit of Nonlocal Gravity: Cosmological Perturbations
The Astrophysical JournalWe explore the cosmological implications of the local limit of nonlocal gravity, which is a classical generalization of Einstein’s theory of gravitation within the framework of teleparallelism.
Javad Tabatabaei +3 more
doaj +1 more source
Cosmological perturbations in models of coupled dark energy [PDF]
, 2009 Sirichai Chongchitnan
openalex +1 more source
On the Elusive Ninth Vibrational State of the Argon Dimer
Natural Sciences, Volume 6, Issue 1, January 2026.ABSTRACT An unresolved discrepancy between high‐accuracy potential energy curves for the argon dimer (Ar2${\rm Ar}_2$), which support different numbers of bound vibrational states and profoundly different scattering lengths for Ar2${\rm Ar}_2$, is probed by morphing these curves to available spectral data within the reduced potential energy curve ...
Vladimír Špirko
wiley +1 more source
Fortschritte der Physik, Volume 74, Issue 1, January 2026.Abstract The propagation of a massive scalar field and a massless Dirac field in the geometry of a dilaton–de Sitter black hole is investigated. Starting from the covariant perturbation equations, the corresponding effective potentials are presented and their dependence on the dilaton charge, field mass, and cosmological constant is analyzed. Using the
Bekir Can Lütfüoğlu
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract Atmospheric gravity waves (GWs) are believed to transport energy and momentum between different regions of the atmosphere. Historically, observations of these waves from both ground and space have been relatively abundant at altitudes up to the lower thermosphere, and somewhat less abundant in the upper thermosphere and F‐region ionosphere ...
Scott L. England +3 more
wiley +1 more source
Cosmological Perturbation Theory and the Spherical Collapse model — I. Gaussian initial conditions [PDF]
, 1998 Pablo Fosalba, Enrique Gaztañaga
openalex +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
On the symmetries of cosmological perturbations [PDF]
, 2020 Daniel Green, Enrico Pajer
openalex +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract Medium‐Scale Traveling Ionospheric Disturbances (MSTIDs) have long been a subject of interest in ionospheric research. However, their spatiotemporal variability across regions, local times, seasons, and solar cycles is very complicated and remains not well established.
Jing Liu +4 more
wiley +1 more source
Testing for the Gaussian nature of cosmological density perturbations through the three-point temperature correlation function [PDF]
, 1993 Xiaochun Luo, David N. Schramm
openalex +1 more source