寻找暗物质-暗能量相互作用：超越共形情形
Searching for dark matter - dark energy interactions: going beyond the conformal case
摘要：
我们考虑一个通用的宇宙学模型，它允许暗物质和暗能量之间的非引力直接耦合。这些耦合的独特宇宙学特征可以通过当前的宇宙学观测来探测，从而使我们能够对由共形和非形式耦合函数组成的这种通用相互作用进行约束。我们进行了一个全球性的分析，以独立地约束共形，非正式，和混合之间的相互作用暗物质和暗能量结合当前的数据从：宇宙微波背景辐射各向异性的普朗克观测，重子声学振荡测量的组合，Ia型超新星样本，从宇宙计时器方法估计的哈勃参数测量的汇编，对当今宇宙膨胀率的直接测量，以及对结构测量增长的汇编。我们发现，在这些耦合的暗能量模型，局部值的哈勃常数的影响并没有显着改变推断的约束，当我们考虑联合分析，包括所有宇宙学探测。此外，参数约束显着改善了结构数据集测量的增长。我们没有发现令人信服的证据表明宇宙暗区内部存在相互作用。
英文摘要：
We consider a generic cosmological model which allows for non-gravitational direct couplings between dark matter and dark energy. The distinguishing cosmological features of these couplings can be probed by current cosmological observations, thus enabling us to place constraints on this generic interaction which is composed of the conformal and disformal coupling functions. We perform a global analysis in order to independently constrain the conformal, disformal, and mixed interactions between dark matter and dark energy by combining current data from: Planck observations of the cosmic microwave background radiation anisotropies, a combination of measurements of baryon acoustic oscillations, a supernovae Type Ia sample, a compilation of Hubble parameter measurements estimated from the cosmic chronometers approach, direct measurements of the expansion rate of the Universe today, and a compilation of growth of structure measurements. We find that in these coupled dark energy models, the influence of the local value of the Hubble constant does not significantly alter the inferred constraints when we consider joint analyses that include all cosmological probes. Moreover, the parameter constraints are remarkably improved with the inclusion of the growth of structure data set measurements. We find no compelling evidence for an interaction within the dark sector of the Universe.
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