Contact
Room 514
P.O.Box: 11155-9161
Tel: +98 21 6616 4508
Fax: +98 21 6602 2711
E-Mail: mansouri@ipm.ir
Personal Page: http://www.rmansouri.ir

 

Research Interests

Relativity and Cosmology.

 

Research Plan

Non-homogeneous cosmological models give us an arena to look for different non-standard phenomenon in relativistic astrophysics and cosmology. In the past years our group has been looking into consequences of such models for the dark energy dilemma in cosmology. We have also worked out a model for structures within a FRW cosmology as an exact solution of Einstein equations. This model has now been used to see how different horizons evolve, and if the familiar black hole thermodynamics and Hawking radiation are valid there. We are currently discussing different general relativistic mass definitions using our exact structure model within a FRW universe to see if there are any differences to the Newtonian picture, given that the gravity may be too weak far from the structure.

 

Selected Publications

• Lensing effects in inhomogeneous cosmological models
  Phys.Rev.D79:102002,2009
  Sima Ghassemi, Salomeh Khoeini Moghaddam, Reza Mansouri

• Non-linear Structure Formation and "Apparent Acceleration: an investigation"
  astro-ph/0605703, JCAP 0712:017, 2007
  co-author: Tirthbir Biswas and Alessio Notari

• A New Distributional Approach to Signature Change
  Gen. Rel. Grav. 32, 253-269 (2000)
  co-author: K. Nozari

• Methods of gluing manifolds in general relativity
  Journ.Math Phys. 43, 1519-1535 (2002)
  co-author: K.Nozari

• A Model Universe with Variable Space Dimension: Its Dynamics and Wave-Function
  Phys. Rev. D 60, 1035XX-1-22 (1999)
  co-author: F. Nasseri

• A Test Theory of Special Relativity I. Simultaneity and Clock Synchronization
  GRG, 8, 497 (1977)
  co-author: R. Sexl

• A Test Theory of Special Relativity II. First Order Tests
  GRG, 8, 515 (1977)
  co-author: R. Sexl

• A Test Theory of Special Relativity III. Second Order Tests
  GRG, 8, 809 (1977)
  co-author: R. Sexl