Time-dependent diffusive interactions between dark matter and dark energy in the context of k-essence cosmology  

作　　者：Abhijit Bandyopadhyay Anirban Chatterjee 

机构地区：[1]Department of Physics,Ramakrishna Mission Vivekananda Educational and Research Institute,Belur Math,Howrah 711202,India

出　　处：《Research in Astronomy and Astrophysics》2021年第1期15-24,共10页天文和天体物理学研究（英文版）

基　　金：University Grants Commission(UGC),India for supporting this work by means of NET Fellowship(Ref.No.22/06/2014(i)EU-V and Sr.No.2061451168)。

摘　　要：We investigated the scenario of time-dependent diffusive interaction between dark matter and dark energy and showed that such a model can be accommodated within the observations of luminosity distanceredshift data in Supernova la(SN la)observations.We obtain constraints on different relevant parameters of this model from the observational data.We consider a homogeneous scalar field(t)driven by a k-essence Lagrangian of the form L=V(φ)F(X)with constant potential V(φ)=V,to describe the dynamics of dark energy in this model.Using the temporal behaviour of the FRW scale factor,the equation of state and total energy density of the dark fluid,extracted from the analysis of SN la(JLA)data,we have obtained the time-dependence of the k-essence scalar field and also reconstructed the form of the function F(X)in the k-essence Lagrangian.

关 键 词：Dark Energy Dark Matter K-ESSENCE 

分 类 号：P159[天文地球—天文学]