Results 81 to 90 of about 69,354 (164)

Inflation scenario in a non-minimal f(Q) gravity model

Physics Letters B
In the context of f(Q) gravity, cosmological inflation takes a different turn. f(Q) gravity is a modified theory of gravity, where the Lagrangian is a function of the non-metricity scalar Q.
S. Davood Sadatian, S. Mohamad Reza Hosseini   +1 more
doaj   +1 more source

Observational tests of modified gravity

Physical Review D, 2008
Modified gravity theories have richer observational consequences for large-scale structure than conventional dark energy models, in that different observables are not described by a single growth factor even in the linear regime. We examine the relationships between perturbations in the metric potentials, density and velocity fields, and discuss ...
Jain, Bhuvnesh, Zhang, Pengjie
openaire   +4 more sources

Gravitomagnetism in modified theory of gravity [PDF]

International Journal of Modern Physics D, 2019
We study the gravitomagnetism in the Scalar-Vector-Tensor theory or Moffat’s Modified theory of Gravity (MOG). We compute the gravitomagnetic field that a slow-moving mass distribution produces in its Newtonian regime. We report that the consistency between the MOG gravitomagnetic field and that predicted by the Einstein’s gravitational theory and ...
openaire   +4 more sources

Modified gravity or modified matter ?

, 2009
6 pages, to appear in l'Astronomie (in French)
openaire   +2 more sources

Contemplating the Fate of Modified Gravity

Universe
Possible models of modified gravity are being extensively studied now, with most phenomenological motivations coming from puzzles and tensions in cosmology due to a natural desire to better fit the known and newly coming data. At the same time, available experimental evidence is limited for testing gravity as a force beyond the regimes in which the ...
Alexey Golovnev, María-José Guzmán
openaire   +3 more sources

Gravitational Waves in Modified Gravity

, 2015
Bachelor ...
openaire   +1 more source

Modified Gravity and Coupled Quintessence [PDF]

, 2014
The distinction between modified gravity and quintessence or dynamical dark energy is difficult. Many models of modified gravity are equivalent to models of coupled quintessence by virtue of variable transformations. This makes an observational differentiation between modified gravity and dark energy very hard. For example, the additional scalar degree
openaire   +2 more sources

Shedding light on gravity: Black hole shadows and lensing signatures in Lorentz gauge theory

Nuclear Physics B
Recent advances, including gravitational wave detections and imaging of black hole shadows, have strongly validated general relativity. Nevertheless, ongoing cosmological observations suggest potential limitations of general relativity, spurring interest
Ali Övgün, Mohsen Fathi
doaj   +1 more source

Mechanism and efficiency analysis of carbon dioxide capture by modified 13X molecular sieve enhanced by high-gravity technology

Adsorption Science & Technology
13X molecular sieve (MS) was modified with diethylenetriamine (DETA) using a high-gravity rotating adsorption bed, and subsequent carbon dioxide (CO 2 ) adsorption experiments were conducted in a high-gravity rotating adsorption bed. The results indicate
Qiang Guo, Jiahao Niu, Guisheng Qi
doaj   +1 more source

Modified gravity from the nonperturbative quantization of a metric. [PDF]

Eur Phys J C Part Fields, 2015
Dzhunushaliev V, Folomeev V, Kleihaus B, Kunz J.   +3 more
europepmc   +1 more source