论文标题
用普朗克和ACT极化在声学深色能模型中测试H0
Testing H0 in Acoustic Dark Energy Models with Planck and ACT Polarization
论文作者
论文摘要
规范的声学暗能量模型（CADE）基于具有规范动力学术语的标量场，该术语迅速将潜力转化为物质辐射平等周围的动能，可以减轻$λ$ CDM中发现的哈勃张力。我们表明，它成功地通过了由ACT数据提供的CMB阻尼尾巴中的新一致性测试，同时通过改进的CMB声学偏振数据与Planck相比，越来越多地限制并与替代机制区分开。一套宇宙学观察套件的最佳合身凯德模型，包括sh0es $ h_0 $测量，具有$ h_0 = 70.25 $，而$ 68.23 $（km s $^{ - 1} $ mpc $^{ - 1} $）in $ CDM $ CDM和一个有限的CADE CADE CADE CADENTENS PREFERED CADENTERS PREFERED CADENTED $2.8σ$ 2.8现在，筹集$ H_0 $的能力主要受到改进的普朗克声学偏振数据的限制，这在区分蛋黄酱和更广泛的早期深色能量模型中也起着至关重要的作用。 ACT和Planck TE极化数据目前在归一化方面有些差异，并且在参数中驱动了相应不同的偏好。在接近宇宙方差极限的中间尺度极化上的改进约束将是对这些模型及其替代方案的声学动力学的敏锐测试。
The canonical acoustic dark energy model (cADE), which is based on a scalar field with a canonical kinetic term that rapidly converts potential to kinetic energy around matter radiation equality, alleviates the Hubble tension found in $Λ$CDM. We show that it successfully passes new consistency tests in the CMB damping tail provided by the ACT data, while being increasingly constrained and distinguished from alternate mechanisms by the improved CMB acoustic polarization data from Planck. The best fit cADE model to a suite of cosmological observations, including the SH0ES $H_0$ measurement, has $H_0=70.25$ compared with $68.23$ (km s$^{-1}$ Mpc$^{-1}$) in $Λ$CDM and a finite cADE component is preferred at the $2.8σ$ level. The ability to raise $H_0$ is now mainly constrained by the improved Planck acoustic polarization data, which also plays a crucial role in distinguishing cADE from the wider class of early dark energy models. ACT and Planck TE polarization data are currently mildly discrepant in normalization and drive correspondingly different preferences in parameters. Improved constraints on intermediate scale polarization approaching the cosmic variance limit will be an incisive test of the acoustic dynamics of these models and their alternatives.
