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Cosmological consequences of a built-in cosmological constant model | Arbab I. Arbab
; | Date: |
30 Dec 2002 | Journal: | JCAP 0305 (2003) 008 | Subject: | astro-ph | Abstract: | We have analyzed the implications of a phenomenological model of a built-in cosmological constant of Rastall and Al-Rawaf -Taha type. We have produced the presently observed cosmic acceleration with the aid of introducing a positive cosmological constant. We have shown that the cosmological models of the type $Lambdaproptofrac{ddot R}{R}, Lambdapropto H^2$ or $Lambdapropto 8pi G
ho$ are equivalent to a built-in cosmological constant model of Al-Rawaf and Taha type. Such models are compatible with the recent observational data and do not suffer from fine tuning problems. We predict a higher lensing probability than in Einstein de Sitter and Abdel Rahman models. We also predict a higher value for the luminosity and angular diameter distances than that of Abdel Rahman model. The lens distribution peaks at relatively smaller values of the lens red-shift and occurs at higher red-shift. | Source: | arXiv, astro-ph/0212565 | Services: | Forum | Review | PDF | Favorites |
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