Constraints on interacting dark energy from time delay lenses

Abstract

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 γmIDE 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, * Corresponding author.1650003-1 Int. J. Mod. Phys. D Downloaded from www.worldscientific.com by UNIVERSITY OF QUEENSLAND on 10/03/15. For personal use only. Y. Pan, S. Cao and L. Liwhich highlights the importance of strong lensing time delay measurements to provide additional observational fits on alternative cosmological models.

New database for a sample of optically bright lensed quasars in the northern hemisphere

“…These variations were used, among other things, to determine accurate time delays between quasar images, which in turn led to constraints on the Hubble constant and the dark components of the Universe (e.g. Oguri 2007;Sereno & Paraficz 2014;Wei et al 2014;Rathna Kumar et al 2015;Yuan Tables 4−6, 8−11, and 13−16 are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/vol/page & Wang 2015; Pan et al 2016;Bonvin et al 2017), as well as on lensing mass distributions (e.g. Goicoechea & Shalyapin 2010).…”

Constraint on the interacting dark energy from the highly redshifted quasar data

“…该文主要通过36组OHD数据 [35] 与580 颗超新星数据(SNIa) [36] 的研究对比, 对暗能量与暗 物质之间的相互作用进行探讨, 宇宙学巧合性问 题被轻微缓解. 在2015年Pan等人 [37] 利用强引力透 镜的时间延迟数据限制三个相互作用模型(ξIDE, γ m IDE, γ d IDE), 比 较 了 三 者 与 数 据 的 符 合 程 度, 得到了γ m IDE模型与观测最符合、 并能轻微缓解 了"巧合性问题"等有意义的结论. [30] .…”

“…本文采用Cao等人 [44] 从甚长基线巡天(VLBI)射 电源类星体数据中提取的红移范围在0.46 < z < 2.76、 120组中等亮度的类星体角尺度-红移数据样 本 [31,[34][35][36][37][38][39][40][41][42][43][44][45] 作为标准直尺限制相互作用模型. 该组数 据的谱指数范围为−0.38 ≤ α ≤ 0.18, 观测亮度范围 在10 27 W/Hz≤ L ≤ 10 28 W/Hz.…”

Fixed-Formation Control Based on Event-Driven of Multi-Agent System

“…Although the leader follower, the virtual structure and the behavior based approach can solve the formation control problem of the UAV framework system. Beard et al [12] point out that these methods are also flawed. For example, the leader follower method achieves the given position according to the distributed control but lack of robustness and the availability of neighborhood information of the leader.…”