11 citations · 29 across the 7 of their papers we have counts for
7 papers
Curvature and topology dependency of the cosmological spectra
Ali A. Asgari, Amir H. Abbassi, Jafar Khodagholizadeh
In this article we investigate dependency of the adiabatic and entropy spectral indices of the cosmological perturbations on the geometry and topology of the background universe. O…
Imprints of intrinsic and exterior curvatures in cosmology
Ali A. Asgari, Amir H. Abbassi
Nowadays, according to the observational evidences the curvature parameter of the universe is neglected and spatially flat FLRW model is on the top of interest for cosmologists. Ho…
Tensor Modes Damping in Matter and Vacuum Dominated Era
Jafar Khodagholizadeh, Amir H. Abbassi, Ali A. Asgari
The present paper has developed an integro-differential equation to propagate cosmological gravitation waves in matter-dominated era in accounting for the presence of free streamin…
Slow-roll inflationary senario in the maximally extended background
A. A. Asgari, A. H. Abbassi
During the inflationary epoch,geometry of the universe may be described by quasi-de Sitter space. On the other hand,maximally extended de Sitter metric in the comoving coordinates…
Damping of tensor mode in spatially closed cosmology
Jafar Khodagholizadeh, Amir H. Abbassi, Ali A. Asgari
We derive an integro-differential equation for propagation of cosmological gravitation waves in spatially closed cosmology whereas the traceless transverse tensor part of the aniso…
Evolution of the spectral index after inflation
Ali A. Asgari, Amir H. Abbassi
In this article we investigate the time evolution of the adiabatic(curvature) and isocurvature (entropy) spectral indices after end of inflation for all cosmological scales and two…