# Web Content Display

**Contact**

Room 514

P.O.Box: 11155-9161

Tel: +98 21 6616 4508

Fax: +98 21 6602 2711

E-Mail: mansouri [at] 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**

- Radiation from the LTB black hole

2011

J.T. Firouzjaee, Reza Mansouri

- Do we know the mass of a black hole? Mass of some cosmological black hole models

2011

J. T. Firouzjaee, M. Parsi Mood, Reza Mansouri

- Asymptotically FRW black holes

2009

J.T. Firouzjaee, Reza Mansouri

- Modified Averaging Processes in Cosmology and the Structured FRW model

2009

Shahram Khosravi, Reza Mansouri, Ehsan Kourkchi

- 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

**Some Books In Farsi Language**

(Click to maximize the pictures)