Zobrazeno 1 - 10
of 369
pro vyhledávání: '"Ghosh, Sushant G"'
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
We analyse the restricted phase space thermodynamics (RPST) of Kerr-Sen-AdS black holes with the central charge $C$ and its conjugate chemical potential $\mu$ but exclude the familiar $PdV$ term in the first law of black hole thermodynamics. That giv
Externí odkaz:
http://arxiv.org/abs/2308.00489
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
Autor:
Afrin, Misba, Ghosh, Sushant G.
Publikováno v:
Mon. Not. Roy. Astron. Soc. 524 3683-3691 (2023)
The Event Horizon Telescope (EHT) collaboration unveiled event-horizon-scale images of the supermassive black holes (SMBHs) M87* and Sgr A*, revealing a dark brightness depression, namely the black hole shadow, whose shape and size may encode the par
Externí odkaz:
http://arxiv.org/abs/2307.08451
We investigate gravitational lensing in the strong deflection regime by loop quantum gravity (LQG)-motivated rotating black hole (LMRBH) metrics with an additional parameter $l$ besides mass $M$ and rotation $a$. The LMRBH spacetimes are regular ever
Externí odkaz:
http://arxiv.org/abs/2305.04336
Autor:
Kumar, Arun, Ghosh, Sushant G.
Publikováno v:
Nuclear Physics B 987 (2023) 116089
The EGB is an outcome of quadratic curvature corrections to the Einstein-Hilbert gravity action in the form of a Gauss-Bonnet (GB) term in $ D > 4$ dimensions, and EGB gravity is topologically invariant in $4D$. Several ways have been proposed for re
Externí odkaz:
http://arxiv.org/abs/2302.02133
Publikováno v:
Phys. Dark Universe 40, 101195 (2023)
We consider Kerr black holes (BHs) surrounded by perfect dark fluid matter (PFDM), with an additional parameter ($k$) because of PFDM, apart from mass ($M$) and rotation parameter ($a$) -- the rotating PFDM BHs. We analyze the photon orbits around PF
Externí odkaz:
http://arxiv.org/abs/2301.06373