Zobrazeno 1 - 10
of 345
pro vyhledávání: '"Maharaj, Sunil D."'
We investigate the universe's evolution within the framework of Rastall gravity, which is an extension of the standard $\Lambda$CDM model. Utilizing a linear parametrization of the Equation of State (EoS) in a Friedmann-Lema\^{\i}tre-Robertson-Walker
Externí odkaz:
http://arxiv.org/abs/2410.12012
The EHT observation revealed event horizon-scale images of the supermassive black holes Sgr A* and M87* and these results are consistent with the shadow of a Kerr black hole as predicted by general relativity. However, Kerr-like rotating black holes
Externí odkaz:
http://arxiv.org/abs/2410.05395
We investigate the status of the gravitational arrow of time in the case of a spherical collapse of a fluid that conducts heat and radiates energy. In particular, we examine the results obtained by W. B. Bonnor in his 1985 paper where he found that t
Externí odkaz:
http://arxiv.org/abs/2402.04188
The Milky Way galaxy is estimated to be home to ten million to a billion stellar-mass black holes (BHs). Accurately determining this number and distribution of BH masses can provide crucial information about the processes involved in BH formation, th
Externí odkaz:
http://arxiv.org/abs/2401.02790
Publikováno v:
Physics of the Dark Universe, 2024
This paper investigates the flat Friedmann-Lema$\hat{\imath}$tre-Robertson-Walker (FLRW) cosmological model using a suitable parameterization represented as a differential equation concerning the energy density of the scalar field, $\rho_{\phi}$, in
Externí odkaz:
http://arxiv.org/abs/2311.11926
We develop a static charged stellar model in $f(R,T)$ gravity where the modification is assumed to be linear in $T$ which is the trace of the energy momentum tensor. The exterior spacetime of the charged object is described by the Reissner-Nordstr\"o
Externí odkaz:
http://arxiv.org/abs/2311.02915
Exact solutions describing rotating black holes can provide significant opportunities for testing modified theories of gravity, which are motivated by the challenges posed by dark energy and dark matter. Starting with a spherical Kiselev black hole a
Externí odkaz:
http://arxiv.org/abs/2307.11611
Publikováno v:
General Relativity and Gravitation (2023) 55:119
This is an important and natural question as the spacetime shear, inhomogeneity and tidal effects are all intertwined via the Einstein field equations. However, as we show in this paper, such scenarios are possible for limited classes of equations of
Externí odkaz:
http://arxiv.org/abs/2306.14581
Autor:
Thirukkanesh, S.1 (AUTHOR), Maharaj, Sunil D.2 (AUTHOR) maharaj@ukzn.ac.za, Sharma, Ranjan3 (AUTHOR)
Publikováno v:
European Physical Journal C -- Particles & Fields. Aug2024, Vol. 84 Issue 8, p1-11. 11p.
Publikováno v:
The Astrophysical Journal, 939, 77 (2022)
The Event Horizon Telescope (EHT) observation unveiled the first image of supermassive black hole Sgr A* showing a shadow of diameter $\theta_{sh}= 48.7 \pm 7\,\mu$as with fractional deviation from the Schwarzschild black hole shadow diameter $\delta
Externí odkaz:
http://arxiv.org/abs/2207.00078