8 citations · 20 across the 5 of their papers we have counts for
5 papers
Re-evaluation of of the normalised Friedmann-Lema\^ıtre-Robertson-Walker model: Implications for Hubble constant determinations
Ahmet M. Öztaş, Michael L. Smith
The description of spacetime is an fundamental problem of cosmology. We explain why the current assignments of spacetime geometries for of the Friedmann-Lema\^ıtre-Robertson-…
Adiabatic expansion of polytropic universe with varying cosmological constant: Models tested with observational data
Ahmet M. Oztas, Emre Dil, Elif Dil +1
We use two large collections of observational data of supernovae type Ia (SNe Ia) to investigate the polytropic Universe including the situation with a varying cosmological constan…
Elliptical Solutions to the Standard Cosmology Model with Realistic Values of Matter Density
Ahmet Mecit Oztas, Michael L. Smith
We have examined a solution to the FRW model of the Einstein and de Sitter Universe, often termed the standard model of cosmology, using wide values for the normalized cosmological…
The Cosmological Constant Constrained with Union2.1 Supernovae Type Ia Data. Derivation and evaluation of several FRW and Carmeli models presenting underwhelming support for the standard model
Ahmet M. Öztaş, Michael L. Smith
We derive several, detailed relationships in terms of the Friedmann, Robertson, Walker (FRW) generalization which describe the Universe during both the radiation and matter dominat…
Distribution of Matter from Singularity with Spherical Symmetry Using Fick Diffusion
Ahmet Mecit Öztaş, Michael L. Smith
A model is presented allowing calculation of energy and matter distribution in the Universe after expansion from singularity without introduction of expansion energy. Beginning wit…