Welcome to the home page of Shant Baghram
Currently I am a Ph.D. student of Cosmology group of Physics department in Sharif University of Technology in Tehran-Iran.
My thesis title is: Observational tests of Dark Energy and Modified Gravity Theories under supervision of Dr. Sohrab Rahvar.
In the thesis I am going to address, the problem of accelerated expansion of the Universe and its probable causes. It is a almost a decade that studying of the universe in largest scale, I mean " cosmology " enters a new era, called the golden age of cosmology. An age which provides us with an enormous amount of data. One of the mind tantalizing results of this is the accelerated expansion of universe confirmed by cosmological data like supernova, cosmic microwave background radiation , large scale structure observations indicate that we live in a low-density, expanding Universe with spatially flat geometry, that, quite surprisingly, appears to have recently entered a phase of accelerated expansion. This latter conclusion emerges naturally when interpreting the observed Hubble diagram of distant Type Ia supernovae within the standard Friedmann-Lemaitre-Robertson-Walker (FLRW) cosmology. It seems that the unknown cause of this accelerated expansion is about 70% percent of our universe known as Dark energy. More precisely in the thesis we address to the question that how cosmological observations can distinguish between the models which try to explain the accelerated expansion of universe. the models like dark energy theories, Modified gravity and cosmological constant.
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