Constraint To The Equation Of State Of Dark Matter Through The Dynamical Cosmic Observations

The people’s understanding of the universe become more clear as time goes by.Today, the study of our universe has coming into the accurate age. The development of cosmology not only depends on the improving of the theory, but also requires the improvement of the accuracy in the cosmic observational data points. The updated data shows that our universe is composed of unknown matters. The published Planck results shows 26.8% component of the universe is the so-called dark matter, which is not interact with the radiation. The dark matter plays a very important role in the development of the universe, so the study of the dark matters becomes a hot research in modern cosmology. In order to confirm the quality of the dark matters, people have brought a large quantities of dark matter models, and use the new cosmic observational data points to constrain the model parameters at the same time. In order to make a better understand of the dark matter, people should determine the model parameters in which the equation of state is the most important parameter. As the dynamical cosmic observations imply the large scale structure information, so the dynamical cosmic observations would gave a better result for the model parameters. In this paper will focus on using the cosmic observational data which includes the large scale structure information to constrain the dark matter model.The structure of this thesis is as follows:The first portion is the introduction. In Chapter 1, we will give a brief introduction of the background knowledge of cosmology including the the background dynamical evolution equations and perturbation evolution equations. Then, we will introduce the cosmic observational data points in Chapter 2, including type-la supernovae, cosmic microwave background radiation, baryon acoustic oscillation, redshift space distortion and weak gravitational lensing. At last, in Chapter 3. we present a new model of dark matter whose equation of state is not zero, and constrain the model parameters by the cosmic observational data. In this thesis, we will add the data include large scale structure information redshift-space distortion and weak gravitational lensing. Then, we will give a comparison with the result without redshift-space distortion and weak gravitational lensing. Finally, the summary and outlook are given.