Results 101 to 110 of about 540,486 (189)

Irreversible Geometrothermodynamics of Open Systems in Modified Gravity. [PDF]

Entropy (Basel), 2023
Pinto MAS, Harko T, Lobo FSN.
europepmc   +1 more source

Probing the geometries of wormholes: A comparative study of f(R,T) and f(Q,T) theories in the presence of BEC matter

Nuclear Physics B
This study explores wormhole solutions within two distinct modified gravity theories, namely f(R,T) gravity and f(Q,T) gravity, incorporating Bose-Einstein condensate (BEC) dark matter to analyze their geometric properties.
Chaitra Chooda Chalavadi, H. Aruna Kumara, V. Venkatesha   +2 more
doaj   +1 more source

A Comprehensive Analysis of Hyperbolical Fluids in Modified Gravity. [PDF]

Entropy (Basel), 2022
Yousaf Z, Bhatti MZ, Khlopov M, Asad H.
europepmc   +1 more source

Cosmological Hints of Modified Gravity ?

, 2015
The recent measurements of Cosmic Microwave Background temperature and polarization anisotropies made by the Planck satellite have provided impressive confirmation of the $\Lambda$CDM cosmological model.
Di Valentino, Eleonora, Melchiorri, Alessandro, Silk, Joseph   +2 more
core   +3 more sources

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

Probing the cosmographic parameters to distinguish between dark energy and modified gravity models

, 2009
In this paper we investigate the deceleration, jerk and snap parameters to distinguish between the dark energy and modified gravity models by using high redshift gamma-ray bursts (GRBs) and supernovae (SNe).
Alam, Allen, Allen, Astier, Basilakos, Bennett, Bento, Bertolami, Caldwell, Caldwell, Capozziello, Capozziello, Capozziello, Carroll, Chevallier, Ciardi, Dai, Davis, Deffayet, Di Girolamo, Dvali, Eisenstein, F. Y. Wang, Firmani, Freedman, Freese, Friedmann, Ghirlanda, Gorini, Huterer, Ishak, Kamenshchik, Kodama, Kunz, Li, Liang, Liang, Liang, Linder, Linder, Maor, Peebles, Perlmutter, Polarski, Poplawski, Poplawski, Qi, Qi, Rapetti, Riess, Riess, Riess, Sahni, Schaefer, Shi Qi, Silva, Spergel, Spergel, Tegmark, Visser, Vollick, Wang, Wang, Wang, Wang, Weinberg, Weller, Wood-Vasey, Wright, Z. G. Dai   +69 more
core   +1 more source

Kinetic Scalar Curvature Extended $f(R)$ Gravity

, 2018
In this work we study a modified version of vacuum $f(R)$ gravity with a kinetic term which consists of the first derivatives of the Ricci scalar.
Chervon, S. V., Mayorova, T. I., Nikolaev, A. V., Odintsov, S. D., Oikonomou, V. K.   +4 more
core   +1 more source

Modified gravity or modified matter ?

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

Superstatistics and Gravitation

Entropy, 2010
We suggest to consider the spacetime as a non-equilibrium system with a long-term stationary state that possess as a spatio-temporally fluctuating quantity ß . These systems can be described by a superposition of several statistics, superstatistics.
Octavio Obregón
doaj   +1 more source

Modified Gravity Without Dark Matter [PDF]

, 2007
28 pages, 10 figures, lecture given at Third Aegean Summer School, The Invisible Universe: Dark Matter and Dark Energy, minor errors corrected, references ...
openaire   +3 more sources