“School of Physic”

Back to Papers Home
Back to Papers of School of Physic

Paper   IPM / Physic / 8697
School of Physics
  Title:   f(R) Gravity: From the Pioneer Anomaly to the Cosmic Acceleration
  Author(s): 
1.  R. Saffari
2.  S. Rahvar
  Status:   Preprint
  Journal:
  Year:  2007
  Supported by:  IPM
  Abstract:
In this work we use metric approach in the modified gravity to study the dynamics of a test particle from the solar system to the cosmological scales. Through the inverse approach we derive an appropriate action to describe the Pioneer anomaly and the flat rotation curve of the spiral galaxies. We propose the action of f(R) = R + R(R/R0 + 2/α)−1ln(R/Rc) where in galactic and solar system scales it reduces to our desire form. The vacuum solution of this action also results in a positive late time acceleration for the universe. We fix the parameters of this model, comparing with the observations.

Download TeX format
back to top
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
Clients Logo
scroll left or right