Title of article
Limits between the Cosmological Parameters from Strong Lensing Observations for Generalized Isothermal Models
Author/Authors
Al-Ani, Ahmed M. A. University of Baghdad - College of Science - Department of Astronomy, Iraq , Ahmed, Abdullah K. University of Baghdad - College of Science - Department of Astronomy, Iraq , Salih, Mohamed A. Ministry of Sciences and Technology - Astronomy and Space Physics Research center, Iraq
From page
394
To page
400
Abstract
This paper including a gravitational lens time delays study for a general family of lensing potentials, the popular singular isothermal elliptical potential (SIEP), and singular isothermal elliptical density distribution (SIED) but allows general angular structure. At first section there is an introduction for the selected observations from the gravitationally lensed systems. Then section two shows that the time delays for singular isothermal elliptical potential (SIEP) and singular isothermal elliptical density distributions (SIED) have a remarkably simple and elegant form, and that the result for Hubble constant estimations actually holds for a general family of potentials by combining the analytic results with data for the time delay and by using the models of distances.
Keywords
distance scale , galaxies: distances and redshifts , gravitational lensing – quasars: Strong Lensing (B 0218+357 B , A , PG1115+080 A , B)
Journal title
Baghdad Science Journal
Journal title
Baghdad Science Journal
Record number
2688504
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