10.9k citations
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4 papers · 2 filters
The Relevance of the Cosmological Constant for Lensing
Mustapha Ishak, Wolfgang Rindler
This review surveys some recent developments concerning the effect of the cosmological constant on the bending of light by a spherical mass in Kottler (Schwarzchild-de Sitter) spac…
Luminosity distance and redshift in the Szekeres inhomogeneous cosmological models
Anthony Nwankwo, Mustapha Ishak, John Thompson
The Szekeres inhomogeneous models can be used to model the true lumpy universe that we observe. This family of exact solutions to Einstein's equations was originally derived with a…
Constraints on growth index parameters from current and future observations
Jason Dossett, Mustapha Ishak, Jacob Moldenhauer +2
We use current and future simulated data of the growth rate of large scale structure in combination with data from supernova, BAO, and CMB surface measurements, in order to put con…
Supernova, baryon acoustic oscillations, and CMB surface distance constraints on f(G) higher order gravity models
Jacob Moldenhauer, Mustapha Ishak, John Thompson +1
We consider recently proposed higher order gravity models where the action is built from the Einstein-Hilbert action plus a function f(G) of the Gauss-Bonnet invariant. The models…