Zobrazeno 1 - 10
of 387
pro vyhledávání: '"Ghosh, Sushant G"'
We investigate strong gravitational lensing by two static black hole models (Model-1 and Model-2) within the Effective Quantum Gravity (EQG) framework, characterized by mass $M$ and parameter $\zeta$. For $\zeta = 0$, they reduce to the Schwarzschild
Externí odkaz:
http://arxiv.org/abs/2410.12382
Autor:
Vachher, Amnish, Ghosh, Sushant G.
We study gravitational lensing in the strong-field limit using the rotating quantum-corrected black hole (RQCBH) with an additional parameter $\alpha$ besides mass $M$ and spin parameter $a$. We discover a decrease in the deflection angle $\alpha_D$,
Externí odkaz:
http://arxiv.org/abs/2410.11332
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 scarcity of quantum gravity (QG) inspired rotating black holes limits the progress of testing QG through observational data, such as that from the Event Horizon Telescope (EHT). Recently, the EHT imaged the supermassive black hole Sgr A*, reveali
Externí odkaz:
http://arxiv.org/abs/2410.09198
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
Publikováno v:
Phys. Dark Universe 46, 101642 (2024)
A general covariant Einstein-Gauss-Bonnet Gravity in Four-Dimensional (4D EGB) spacetime is shown to bypass Lovelock's theorem and is free from Ostrogradsky instability. Meanwhile, the bumblebee theory is a vector-tensor theory. It extends the Einste
Externí odkaz:
http://arxiv.org/abs/2409.06218
We examine and compare the gravitational lensing, in the strong field limit, for the spherically symmetric string-inspired Euler-Heisenberg black holes, characterized by additional parameters $Q^2$ and $\alpha-\beta$, representing magnetic charge and
Externí odkaz:
http://arxiv.org/abs/2405.06501
We obtain an exact solution of spherically symmetric Letelier AdS black holes immersed in perfect fluid dark matter (PFDM). Considering the cosmological constant as the positive pressure of the system and volume as its conjugate variable, we analyse
Externí odkaz:
http://arxiv.org/abs/2403.16454
Autor:
Ayzenberg, Dimitry, Blackburn, Lindy, Brito, Richard, Britzen, Silke, Broderick, Avery E., Carballo-Rubio, Raúl, Cardoso, Vitor, Chael, Andrew, Chatterjee, Koushik, Chen, Yifan, Cunha, Pedro V. P., Davoudiasl, Hooman, Denton, Peter B., Doeleman, Sheperd S., Eichhorn, Astrid, Eubanks, Marshall, Fang, Yun, Foschi, Arianna, Fromm, Christian M., Galison, Peter, Ghosh, Sushant G., Gold, Roman, Gurvits, Leonid I., Hadar, Shahar, Held, Aaron, Houston, Janice, Hu, Yichao, Johnson, Michael D., Kocherlakota, Prashant, Natarajan, Priyamvada, Olivares, Héctor, Palumbo, Daniel, Pesce, Dominic W., Rajendran, Surjeet, Roy, Rittick, Saurabh, Shao, Lijing, Tahura, Shammi, Tamar, Aditya, Tiede, Paul, Vincent, Frédéric H., Visinelli, Luca, Wang, Zhiren, Wielgus, Maciek, Xue, Xiao, Yakut, Kadri, Yang, Huan, Younsi, Ziri
The Event Horizon Telescope (EHT) Collaboration recently published the first images of the supermassive black holes in the cores of the Messier 87 and Milky Way galaxies. These observations have provided a new means to study supermassive black holes
Externí odkaz:
http://arxiv.org/abs/2312.02130
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