Results 61 to 70 of about 74,681 (258)
Cosmological Perturbation Theory for streams of relativistic particles [PDF]
, 2014 Motion equations describing streams of relativistic particles and their properties are explored in detail in the framework of Cosmological Perturbation Theory.
Bernardeau, Francis, Dupuy, Hélène
core +5 more sources
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
New explanation for accelerated expansion and flat galactic rotation curves
European Physical Journal C: Particles and Fields, 2020 Employing the non-additive Tsallis entropy, $$S\sim A^{\beta }$$ S∼Aβ , for the large-scale gravitational systems, we disclose that in the cosmological scales both the Friedmann equation and the equation of motion for Newtonian cosmology get modified ...
Ahmad Sheykhi
doaj +1 more source
Modified cosmology through Kaniadakis horizon entropy
European Physical Journal C: Particles and Fields, 2021 We apply the gravity-thermodynamics conjecture, namely the first law of thermodynamics on the Universe horizon, but using the generalized Kaniadakis entropy instead of the standard Bekenstein–Hawking one.
Andreas Lymperis +2 more
doaj +1 more source
General relativistic corrections and non-Gaussianity in large scale structure
, 2014 General relativistic cosmology cannot be reduced to linear relativistic perturbations superposed on an isotropic and homogeneous (Friedmann-Robertson-Walker) background, even though such a simple scheme has been successfully applied to analyse a large ...
Matarrese, Sabino +2 more
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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
Cosmology with Relativistically Varying Physical Constants [PDF]
, 2020 Rajendra P. Gupta
openalex +3 more sources
Gravitational matter creation, multi-fluid cosmology and kinetic theory
European Physical Journal C: Particles and Fields, 2023 A macroscopic and kinetic relativistic description for a decoupled multi-fluid cosmology endowed with gravitationally induced particle production of all components is proposed.
S. R. G. Trevisani, J. A. S. Lima
doaj +1 more source
Weaving Political Identities: Jean‐Luc Nancy, Empedocles, and (the Later) Plato
Constellations, EarlyView.
Benjamin Hutchens
wiley +1 more source
Journal of Geophysical Research: Space Physics, Volume 131, Issue 1, January 2026.Abstract Earth's outer radiation belt electron flux is highly variable and can be enhanced by over an order of magnitude over timescales less than one day, as observed during the October 2012 storm. Previous studies of this storm (e.g., Reeves et al., 2013, https://doi.org/10.1126/science.1237743) have invoked local acceleration to explain this ...
L. G. Ozeke +4 more
wiley +1 more source