Mathematics – Logic
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006iaujd...7e..39r&link_type=abstract
The Universe at z > 6, 26th meeting of the IAU, Joint Discussion 7, 17-18 August 2006, Prague, Czech Republic, JD07, #39
Mathematics
Logic
Scientific paper
Observations of Supernova Type Ia and Cosmic Microwave Background Radiation indicate an accelerating expansion for the universe. Cosmological constant can be used to interpret the universe acceleration. However, there are two main problems of fine-tuning and cosmic coincidence with the cosmological constant. One of the solutions is using a scalar field, so-called quintessence model that produces a negative pressure and make an accelerating universe. The problem of the quintessence model is the exotic property of the scalar field that needs to fulfil the acceleration condition of the universe. Recently the third approach for solving this problem by changing the action of the gravity is used. Here we use the action of f(R)=√{R^2-R_0^2} to interpret the acceleration of the universe, where R_0 is the minimum curvature of the universe. We fit the observed Gold sample of Supernova Type Ia and WAMP data with this model. As a consistency test we study the effect of this action in the solar system, calculating Mercury perihelion and instability test of action in the vacuum spac
Baghram Shant
Habibi Farhang
Rahvar Sohrab
Sheikh Jabbari M. M.
No associations
LandOfFree
Observational test on a generalized theory of Gravity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Observational test on a generalized theory of Gravity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Observational test on a generalized theory of Gravity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1784020