Main research interests:

  • A- Cosmology (Modified gravity, Dark energy, Dark matter, Post-Newtonian theory)
  • B- Astrophysics (Galactic dynamics, N-body simulations, Relativistic astrophysics)

My Ph.D. students:

  1. Sara Jamali ;

    Ferdowsi University Of Mashhad;

    Thesis topic: “Cosmological and astrophysical consequences of scalar-tensor-vector theory of gravity”;

    Grant: 39640 (4/11/1394)

    September 2013- September 2018

  2. Neda Ghafourian;

    Ferdowsi University Of Mashhad;

    Thesis topic: “Dynamics of spiral galaxies in modi ed gravity (MOG)”;

    Grant: 41395 (22/4/1395)

    September 2013- September 2018

  3. Elham Nazari (ongoing);

    Ferdowsi University Of Mashhad;

    Co-supervisor: Shahram Abbassi;

    Thesis topic: ” Investigating relativistic corrections on the Jeans instability in the first post-Newtonian approximation”;

    Grant: 43364 (17/12/1395)

    Starting date: March 4th, 2017.

  4. Ali Kazemi ;

    Ferdowsi University Of Mashhad;

    Thesis topic: ” Post-Newtonian corrections on the gravitational stability of self-gravitating systems with rotation”;

    Grant: 43710 (28/2/1396)

    September 2014- September 2018

Research Projects

  • Galactic N-body simulations in modified gravity

    Galactic N-body simulations in modified gravity

    Evolution and structure of spiral galaxies is a golden place to search for differences between dark matter particles and modified theories of gravity. In fact although both approaches an reproduce the observed rotation curves, the long term dynamics of galaxies are seriously different. more specifically these viewpoints lead to different bulge and bar formation scenarios. Our main purpose in this project is to use high resolution N-body simulations to predict observable differences between modified theories which deny the existence of dark matter particles, and the standard dark matter paradigm.

  • Post-Newtonian hydrodynamics: Stability issues

    Post-Newtonian hydrodynamics: Stability issues

    Currently post-Newtonian theory is used as a standard tool to interpret gravitational wave signals received by LIGO. In this project we use this method to study the gravitational stability of relativistic systems where classical and non-relativistic stability criteria do not work. For example to study the local fragmentations in the disks around hyper massive neutron stars (HMNS) it is extremely useful to exploit post-Newtonian hydrodynamics. The other important aim in this project is to develop post-Newtonian magneto-hydrodynamics. The relativistic effects of the magnetic fields in the local and global dynamics of above mentioned astrophysical systems, can be studied using the post-Newtonian approach.

  • Energy-momentum-squared gravity

    Energy-momentum-squared gravity

    EMSG is a gravitational theory which allows second order scalars constructed from energy-momentum tensor in the generic action. This theory resolves the big bang singularity and leads to a viable cosmological history. The main aim of this project is to investigate the cosmological and astrophysical consequences of the theory and compare them with the relevant observations.

  • Cosmological consequences of scalar-tensor-vector theory of gravity (MOG)

    Cosmological consequences of scalar-tensor-vector theory of gravity (MOG)

    MOG is a scalar-tensor-vector theory of gravity introduced by John Moffat to address the dark matter problem. A Proca vector field plays a crucial role in this theory to explain the flat rotation curves without invoking dark matter particles. This theory is not a dark energy model, and can be compared with MOND. Studying the astrophysical and cosmological consequences of this theory, is the main purpose of this project.