New Interacting Model and its Stability 孙成一 西北大学现代物理研究所
New interacting DE model and its stability Stability of Interacting DE Model 孙成一 西北大学现代物理研究所
New Interacting DE Model : it was found Q was likely to change its sign around z=0.5. 孙成一 西北大学现代物理研究所
New Interacting DE Model New Q: The model with the constant parameter of equation of state: 孙成一 西北大学现代物理研究所
New Interacting DE Model Evolutions of DE and cold dark matter (CDM): 孙成一 西北大学现代物理研究所
New Interacting DE Model Roughly Compare with Observational data of supernova type Ia and radio-galaxy: 孙成一 西北大学现代物理研究所
New Interacting DE Model 孙成一 西北大学现代物理研究所
New Interacting DE Model Roughly compare with 7-year WMAP data: 孙成一 西北大学现代物理研究所
Stability of Interacting Model The stability of the non-interacting model is determined by the square sound speed: and the adiabatic sound speed: Effective square sound speed in interacitng model: 孙成一 西北大学现代物理研究所
Stability of Interacting Model Conserved effective energy-momentum tensors: Einstein equations: 孙成一 西北大学现代物理研究所
Stability of Interacting Model The perturbed FRW metric in conformal Newtonian gauge: The perturbed parameters: 孙成一 西北大学现代物理研究所
Stability of Interacting Model The evolving equations of perturbations: 孙成一 西北大学现代物理研究所
Stability of Interacting Model Taking the geometric optic limit: 孙成一 西北大学现代物理研究所
Stability of Interacting Model Eigenvalues: Even in the interacting model, the stabilities of the fluids are determined by the squared sound speed of DE: In the model with constant : , there exist adiabatic instabilities, as in the non-interacting models. 孙成一 西北大学现代物理研究所
New Interacting DE Model and its stability Sun Cheng-Yi and Rui-Hong Yue, “New Interaction between Dark Energy and Dark Matter Changes Sign during Cosmological Evolution”, Phys. Rev. D 85 (2012), 043010; arXiv:1009.1214[gr-qc].arXiv:1009.1214[gr-qc]. 孙成一 西北大学现代物理研究所
谢谢！ 孙成一 西北大学现代物理研究所