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首页> 外文期刊>International journal of modern physics, D. Gravitation, astrophysics, cosmology >Constraints on interacting dark energy from time delay lenses
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Constraints on interacting dark energy from time delay lenses

机译:限制延时镜头与暗能量相互作用

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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.
机译:我们使用18个强重力透镜(SGL)系统中透镜源的多个图像之间的时间延迟测量,对暗能量(DE)和暗物质(DM)的三种现象学相互作用模型施加了额外的约束。这三个模型的拟合之间的兼容性似乎暗示着DE和DM之间的耦合是接近零的小值,这与约束交互DE参数的先前结果兼容。我们发现,在三个相互作用的DE模型中,具有与DM能量密度成比例的相互作用项Q的gamma(m)IDE模型可以更好地拟合最近的观测结果。但是,在三个相互作用的DE模型的框架中,重合问题仍然非常严重,因为拟合结果并未显示出对DE和DM之间非零耦合的任何偏好。更重要的是,我们已经研究了当前强大的透镜数据在得出暗区之间相互作用信息方面的重要性,这凸显了强大的透镜时间延迟测量对于为替代宇宙学模型提供更多观测拟合的重要性。

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