Results 111 to 120 of about 58,534 (245)

Alfven modes driven non-linearly by metric perturbations in anisotropic magnetized cosmologies

, 2007
We consider anisotropic magnetized cosmologies filled with conductive plasma fluid and study the implications of metric perturbations that propagate parallel to the ambient magnetic field.
APOSTOLOS KUIROUKIDIS, DEMETRIOS B. PAPADOPOULOS, Kokkotas K. D., KOSTAS KLEIDIS, Moortgat J., Ruzmaikina T. V., Zel'dovich Ya B.   +6 more
core   +1 more source

Lateral Variations in Lunar Crustal Thickness Inferred From Apollo Seismic and GRAIL Gravity Data

Journal of Geophysical Research: Planets, Volume 131, Issue 5, May 2026.
Abstract The internal structure of the Moon is key to understanding its formation, evolution, and bulk composition. In particular, determining the structure of the crust–mantle interface (Moho), including its lateral variations, is of significant importance, but current knowledge is still insufficient to fully constrain it.
Xiang Zhang, Taichi Kawamura, Mélanie Drilleau, Philippe Lognonné, Samuel Henri, Zongbo Xu, Keisuke Onodera, Thomas Bodin   +7 more
wiley   +1 more source

Solar Wind‐Magnetosphere‐Ionosphere Coupling During the October 2024 Storms

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract Two geomagnetic storms occurred in October 2024 (Oct 6‐9 and 10–12), driven by the impact of a series of interplanetary coronal mass ejections on the magnetosphere. The first was a moderate storm, with peak Sym‐H near −150 nT, whereas the second was intense, Sym‐H reaching −340 nT.
S. E. Milan, M. K. Mooney, G. E. Bower, R. M. Hodnett, U. V. Amerstorfer, C. Möstl, A. Samsonov, B. J. Anderson, J. Gjerloev, S. K. Vines   +9 more
wiley   +1 more source

On the Perturbed Friedmann Equations in Newtonian Gauge

Universe
Based on Newtonian mechanics, in this article, we present a heuristic derivation of the Friedmann equations, providing an intuitive foundation for these fundamental relations in cosmology.
Jaume de Haro, Emilio Elizalde, Supriya Pan   +2 more
doaj   +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

Modeling the Detectability of Energetic Heliospheric Ions at Pluto During the New Horizons Flyby

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract We investigate the detectability of heliospheric helium ions at energies up to 100 keV by the New Horizons (NH) spacecraft during its flyby through Pluto's induced magnetosphere. The Pluto Energetic Particle Spectrometer Science Investigation energetic ion detector observed a reduction in their flux by an order of magnitude as the spacecraft ...
Randall T. Ruch, Sven Simon, Peter Kollmann, C. Michael Haynes   +3 more
wiley   +1 more source

Archives of impact: The politics of craters on Earth

Geographical Research, Volume 64, Issue 2, May 2026.
This paper examines Earth’s 195 confirmed impact craters as archives, exploring their cataloguing and presentation as heritage sites. It argues Western scientific framings using military language and emphasising catastrophe overlook settler colonialism’s violent histories and marginalise indigenous earth‐sky cosmologies.
Gareth Hoskins
wiley   +1 more source

Axial gravitational normal modes of uniform density star in Anti-de Sitter spacetime

Nuclear Physics B
The article studies the dynamical behavior of axial gravitational perturbations of homogeneous stars in Anti-de Sitter spacetime. Because the radial coordinate r transforms into the tortoise coordinate y=y(r), obeying y(r=0)=0 and y(r ...
Kai Lin, Alan B. Pavan, Amilcar Rabelo De Queiroz, Elcio Abdalla   +3 more
doaj   +1 more source

Three Methods to Identify and Visualize Nonuniform Changes in Interatomic Interactions: Second‐Difference Analysis, Anharmonicity Inversion, and Distance‐Dependent NMR Absolute Shieldings

International Journal of Quantum Chemistry, Volume 126, Issue 7, April 5, 2026.
Three complementary approaches have been developed to visualize how vibrational excitation alters the potential energy surface of a diatomic electronic state, aiding in the interpretation of these changes and in the elucidation of the underlying interatomic interactions.
Ilya G. Shenderovich, Gleb S. Denisov
wiley   +1 more source

Local Limit of Nonlocal Gravity: Cosmological Perturbations

The Astrophysical Journal
We 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, Abdolali Banihashemi, Shant Baghram, Bahram Mashhoon   +3 more
doaj   +1 more source