Zobrazeno 1 - 10
of 52
pro vyhledávání: '"Karimov, R. Kh."'
Publikováno v:
In Annals of Physics November 2024 470
Publikováno v:
Eur. Phys. J. C 80, 1138 (2020)
We first advance a mathematical novelty that the three geometrically and topologically distinct objects mentioned in the title can be exactly obtained from the Jordan frame vacuum Brans I solution by a combination of coordinate transformations, trigo
Externí odkaz:
http://arxiv.org/abs/2012.13564
Publikováno v:
Ann. Phys. 413, 168069 (2020)
A well known solution of heterotic string theory is the spinning Kerr-Sen black hole (KSBH) characterized by a string parameter $\xi$. Kerr black hole is recovered at $\xi=0$. The purpose of this paper is to investigate the effect of $\xi$ on a new d
Externí odkaz:
http://arxiv.org/abs/2002.01149
Publikováno v:
Eur. Phys. J. C 78, 788 (2018)
It seems surprising that the emissivity properties of the accretion disk (\textit{\`{a} la} Page and Thorne) surrounding the Gibbons-Maeda-Garfinkle-Horowitz-Strominger (GMGHS) black holes of heterotic string theory have not yet been studied. To fill
Externí odkaz:
http://arxiv.org/abs/2002.00589
Vacuum Brans-Dicke theory can be self-consistently described in two frames, the Jordan frame (JF) and the conformally rescaled Einstein frame (EF), the transformations providing an easy passage from one frame to the other at the level of actions and
Externí odkaz:
http://arxiv.org/abs/1911.03088
Publikováno v:
A. Kulbakova et al., Class. Quantum Grav 35, 115014 (2018)
The \textit{exact} Sagnac delay in the Kerr-Taub-NUT (Newman-Unti-Tamburino) spacetime is derived in the equatorial plane for non-geodesic as well as geodesic circular orbits. The resulting formula, being exact, can be directly applied to motion in t
Externí odkaz:
http://arxiv.org/abs/1905.02496
Publikováno v:
Mon. Not. R. Astron. Soc. 483, 3754 (2019)
We extend a recent work on weak field first order light deflection in the MOdified Gravity (MOG) by comprehensively analyzing the actual observables in gravitational lensing both in the weak and strong field regime. The static spherically symmetric b
Externí odkaz:
http://arxiv.org/abs/1905.01900
Publikováno v:
Eur. Phys. J. C 79, 952 (2019)
A new rotating generalization of the Damour-Solodukhin wormhole (RDSWH), called Kerr-like wormhole, has recently been proposed and investigated by Bueno \textit{et al} for echoes in the gravitational wave signal. We show a novel feature of the RDSWH,
Externí odkaz:
http://arxiv.org/abs/1901.05762
Publikováno v:
Eur. Phys. J. Plus (2018) 133: 44
Relativistic twin paradox can have important implications for Mach's principle. It has been recently argued that the behavior of the time asynchrony (different aging of twins) between two flying clocks along closed loops can be attributed to the exis
Externí odkaz:
http://arxiv.org/abs/1712.06412
Publikováno v:
Gen. Relativ. Gravit. 50 (2018) 44
Modified gravity theories include $f(\mathbf{R})-$gravity models that are usually constrained by the cosmological evolutionary scenario. However, it has been recently shown that they can also be constrained by the signatures of accretion disk around
Externí odkaz:
http://arxiv.org/abs/1709.08413