Cao, S (reprint author), Beijing Normal Univ, Dept Astron, Beijing 100875, Peoples R China.
文章类型:
Article
英文摘要:
We use the time delay measurements between multiple images of lensed sources in 18 strongly gravitationally lensed (SGL) systems to put additional constraints on three phenomenological interaction models for dark energy (DE) and dark matter (DM). The compatibility among the fits on the three models seems to imply that the coupling between DE and DM is a small value close to zero, which is compatible with the previous results for constraining interacting DE parameters. We find that, among the three interacting DE models, the gamma(m) IDE model with the interaction term Q proportional to the energy density of DM provides relatively better fits to recent observations. However, the coincidence problem is still very severe in the framework of three interacting DE models, since the fitting results do not show any preference for a nonzero coupling between DE and DM. More importantly, we have studied the significance of the current strong lensing data in deriving the interacting information between dark sectors, which highlights the importance of strong lensing time delay measurements to provide additional observational fits on alternative cosmological models.
Ministry of Science and Technology [2012CB821804, 2014CB845806]
; National Natural Science Foundation of China [11503001, 11073005, 11005164, 11373014, 11447213]
; Chongqing Municipal Education Commission [KJ130535]
; Scientific Research Foundation For Doctor of Chongqing University of Posts and Telecommunications [A2013-25, A2014-43]
; Fundamental Research Funds for the Central Universities
; Scientific Research Foundation of Beijing Normal University
; China Postdoctoral Science Foundation [2014M550642, 2015T80052]
