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arXiv 1907.07540astro-ph.COgr-qc
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与动力学暗能量相互作用的情景:观测限制和$H_0$张力的缓和

Interacting scenarios with dynamical dark energy: observational constraints and alleviation of the $H_0$ tension

Supriya Pan, Weiqiang Yang, Eleonora Di Valentino, Emmanuel N. Saridakis, Subenoy Chakraborty

摘要:

我们调查相互作用的情况下,属于更广泛的类,因为它们包括一个动态的暗能量组件的状态方程如下各种单参数化。我们用宇宙微波背景辐射(CMB)、Ia型超新星的联合光变曲线(JLA)、重子声学振荡(BAO)、宇宙计时器(CC)的哈勃参数测量和哈勃参数的高斯先验$H_0$等最新观测数据与他们对抗。在所有检查的情况下,我们发现一个非零的相互作用,但非相互作用的情况下,允许在2 $σ$。关于所有数据集组合的暗能量状态方程的当前值,它总是处于超过两个/三个标准差的幻影状态。最后,对于所有相互作用的模型,独立的数据集的组合考虑,目前的哈勃参数$H_0$的估计值是更大的$Λ$ CDM为基础的普朗克的估计和接近当地的测量,从而减轻了$H_0$紧张。

英文摘要:

We investigate interacting scenarios which belong to a wider class, since they include a dynamical dark energy component whose equation of state follows various one-parameter parametrizations. We confront them with the latest observational data from Cosmic Microwave Background (CMB), Joint light-curve (JLA) sample from Supernovae Type Ia, Baryon Acoustic Oscillations (BAO), Hubble parameter measurements from Cosmic Chronometers (CC) and a gaussian prior on the Hubble parameter $H_0$. In all examined scenarios we find a non-zero interaction, nevertheless the non-interacting case is allowed within 2$σ$. Concerning the current value of the dark energy equation of state for all combination of datasets it always lies in the phantom regime at more than two/three standard deviations. Finally, for all interacting models, independently of the combination of datasets considered, the estimated values of the present Hubble parameter $H_0$ are greater compared to the $Λ$CDM-based Planck's estimation and close to the local measurements, thus alleviating the $H_0$ tension.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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