Constraints On Bounce Inflation Cosmological Models From CMB And Related Observations

Over the years,the origin of the universe has always been a hot topic,especially on the cosmological singularity problem.In this paper,we give a model can avoid the singularity problem,namely bounce inflation model.We make constraints on parameters of the model using latest data.This model describes the early universe from a contracting phase,bouncing into an ordinary inflationary phase,followed by the reheating process,until now.We give two models.One is simple bounce inflation model,and the other is Galileon bounce inflation model.We fit the CMB TT spectrum of the new model using Planck2015+BK14+BAO.The simple bounce inflation mainly consider the continuity of scale factor a and Hubble parameter|H|.The Galileon bounce inflation model resolve the Ghost instability problem arising from the NEC(Null Energy Condition)violation,and it describes the universe from a contracting phase,through the bounce phase,and into the inflation phase.The bounce phase reflects fine structure of the bounce,and we fit the model with the latest data.It shows that this model may generate the power deficit,bump and sunken at low-l.