Zobrazeno 1 - 10
of 112
pro vyhledávání: '"Vacuum solution (general relativity)"'
Publikováno v:
Arab Journal of Mathematical Sciences. 28:77-86
PurposeThe purpose of this paper is to study the Bertotti–Kasner space-time and its geometric properties.Design/methodology/approachThis paper is based on the features of λ-tensor and the technique of six-dimensional formalism introduced by Pirani
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::66cf250cca4d752d00025587cea3350c
https://doi.org/10.1108/ajms-10-2020-0085
https://doi.org/10.1108/ajms-10-2020-0085
Autor:
Dibakar Roychowdhury, Hemant Rathi
Publikováno v:
Journal of High Energy Physics, Vol 2021, Iss 10, Pp 1-44 (2021)
Journal of High Energy Physics
Journal of High Energy Physics
We construct the most general theory of 2D Einstein-dilaton gravity coupled with $U(1)$ gauge fields that contains all the 2-derivative and the 4-derivative interactions allowed by the diffeomorphism invariance. We renormalise the 2D action and obtai
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ffde53420d0407545c294e236a1e947a
http://arxiv.org/abs/2107.11632
http://arxiv.org/abs/2107.11632
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 6, Pp 1-14 (2021)
European Physical Journal
European Physical Journal
We derive the main classical gravitational tests for a recently found vacuum solution with spin and dilation charges in the framework of Metric-Affine gauge theory of gravity. Using the results of the perihelion precession of the star S2 by the GRAVI
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::33dcc7526fc6a40040cade3b85ba98ce
http://arxiv.org/abs/2103.12036
http://arxiv.org/abs/2103.12036
In this paper, we investigate the Einstein equations with cosmological constant for Randall-Sundrum (RS) and Dvali-Gabadadze-Porrati (DGP) models to determine the warp functions in the context of warp product spacetimes. In RS model, it is shown that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd2cba6b97c4d1208c28f7490dcd4e2b
Autor:
J. L. Hernández-Pastora
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 80, Iss 5, Pp 1-13 (2020)
European Physical Journal
European Physical Journal
A method to construct interior axially symmetric metrics that appropriately match with any vacuum solution of the Weyl family is developed in Hernández-Pastora et al. (Class Quantum Gravity 33:235005, 2016). It was shown, for the case of some vacuum
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::12fb037c45ef1476da2261ef14b7c65e
https://doi.org/10.1140/epjc/s10052-020-7970-2
https://doi.org/10.1140/epjc/s10052-020-7970-2
Autor:
Banibrata Mukhopadhyay, Surajit Kalita
Publikováno v:
European Physical Journal
European Physical Journal C: Particles and Fields, Vol 79, Iss 10, Pp 1-8 (2019)
European Physical Journal C: Particles and Fields, Vol 79, Iss 10, Pp 1-8 (2019)
A number of recent observations have suggested that the Einstein's theory of general relativity may not be the ultimate theory of gravity. The f(R) gravity model with R being the scalar curvature turns out to be one of the best bet to surpass the gen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b7ceee6b635b22c9fc4da828b9736e54
We consider a well-known static, axially symmetric, vacuum solution of Einstein equations belonging to Weyl's class and determine the fundamental frequencies of small harmonic oscillations of test particles around stable circular orbits in the equato
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::281a3c2870859a1c3c011018a8f917c6
http://arxiv.org/abs/1905.01088
http://arxiv.org/abs/1905.01088
Autor:
Mushtaq Ahmad, M. Farasat Shamir
Publikováno v:
Astrophysics and Space Science. 364
An exact solution pertaining to the existence of cosmic strings has been discussed for a cylindrically symmetric $f(\mathcal{G},T)$ gravity model, with $\mathcal{G}$ being the Gauss-Bonnet invariant and $T$ the trace of energy momentum tensor. This s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c9ff94b162eca9f8b4f9c1e04235e066
https://doi.org/10.1007/s10509-019-3536-x
https://doi.org/10.1007/s10509-019-3536-x
Autor:
Pisin Chen, Che-Yu Chen
It is believed that in the near future, gravitational wave detections will become a promising tool not only to test gravity theories, but also to probe extremely curved spacetime regions in our universe, such as the surroundings of black holes. In th
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a7f5ec744e46b577ef7e4ea031b6d4d9
http://arxiv.org/abs/1902.01678
http://arxiv.org/abs/1902.01678
Autor:
Irene Brito
Publikováno v:
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
Preprint
The problem of generating solutions of the Einstein field equations with an elastic energy-momentum tensor from the Schwarzschild vacuum solution by means of conformal transformations is analyzed. Applying the formulation of relativisti
The problem of generating solutions of the Einstein field equations with an elastic energy-momentum tensor from the Schwarzschild vacuum solution by means of conformal transformations is analyzed. Applying the formulation of relativisti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26d6ef354b21631f250dcb356499861e