3 papers
gr-qc2025
Time delay in matched exterior and interior Kottler solutions
Mourad Guenouche
We extend the study of gravitational lensing to photons traversing the lens mass, modeled as a uniform-density fluid described by the interior Kottler (Schwarzschild--de Sitter) so…
gr-qc2025
Lensing in matched exterior and interior Kottler solutions
Mourad Guenouche
We analyze gravitational lensing in a matched Kottler spacetime with cosmological constant , where a uniform-density fluid sphere described by the interior Kottler solution is…
gr-qc2025
Deflection of light and time delay in hyperbolic Einstein-Straus--de Sitter solution
Mourad Guenouche
We analyze strong gravitational lensing by a spherically symmetric mass distribution within the Einstein-Straus-de Sitter framework in a spatially open Universe with negative curva…