由普朗克、ACTPol和SPTPol测量的E模式(EE)CMB功率谱将哈勃常数约束为标准$Λ$ CDM模型(后验均值和中心68%区间界限)内的$70.0\pm2.7$、$72.4^{+3.9}_{-4.8}$和$73.1^{+3.3}_{-3.9}$ km s $^{-1}$ Mpc $^{-1}$。这些值高于普朗克温度(TT)功率谱的限制,并与造父变星超新星距离阶梯测量$H_0=73.2\pm1.3$ km s $^{-1}$ Mpc $^{-1}$一致。如果这种对更高值的偏好在联合分析中得到加强,它可能会为哈勃分歧的解决提供一个有趣的暗示。然而,我们发现,结合普朗克,ACTPol,和SPTPol EE的可能性产生$H_0=68.7\pm1.3$ km s $^{-1}$ Mpc $^{-1}$,$2.4σ$低于距离阶梯测量。这是由于不同的简并方向在整个参数空间,特别是涉及重子密度,$Ω_bh^2$,和标量倾斜,$n_s$,所产生的灵敏度不同的多极范围。我们表明,E-模式$Λ$ CDM约束是一致的,在$1.4σ$内的不同实验,并与普朗克TT结果在$0.8σ$。结合普朗克,ACTPol,和SPTPol EE数据约束的现象学透镜振幅,$A_L=0.89\pm0.10$,与预期值一致的单位。
英文摘要:
The E-mode (EE) CMB power spectra measured by Planck, ACTPol, and SPTpol constrain the Hubble constant to be $70.0\pm2.7$, $72.4^{+3.9}_{-4.8}$, and $73.1^{+3.3}_{-3.9}$ km s$^{-1}$ Mpc$^{-1}$ within the standard $Λ$CDM model (posterior mean and central 68% interval bounds). These values are higher than the constraints from the Planck temperature (TT) power spectrum, and consistent with the Cepheid-supernova distance ladder measurement $H_0=73.2\pm1.3$ km s$^{-1}$ Mpc$^{-1}$. If this preference for a higher value was strengthened in a joint analysis it could provide an intriguing hint at the resolution of the Hubble disagreement. We show, however, that combining the Planck, ACTPol, and SPTpol EE likelihoods yields $H_0=68.7\pm1.3$ km s$^{-1}$ Mpc$^{-1}$, $2.4σ$ lower than the distance ladder measurement. This is due to different degeneracy directions across the full parameter space, particularly involving the baryon density, $Ω_bh^2$, and scalar tilt, $n_s$, arising from sensitivity to different multipole ranges. We show that the E-mode $Λ$CDM constraints are consistent across the different experiments within $1.4σ$, and with the Planck TT results at $0.8σ$. Combining the Planck, ACTPol, and SPTpol EE data constrains the phenomenological lensing amplitude, $A_L=0.89\pm0.10$, consistent with the expected value of unity.
Preferred axis of CMB parity asymmetry in the masked maps
WMAP和Planck数据都显示出在大尺度的宇宙微波背景(CMB)温度各向异性中有明显的奇多极偏好。如果这种模式起源于宇宙学效应,那么它可以被认为是违反宇宙学原理的关键线索。通过在全天普朗克2015地图中定义各种方向相关统计数据(例如,参见Naselsky等人(2012); W. Zhao(2014)),我们发现CMB平价不对称有一个偏好方向,这与统计量的选择无关。特别是,这个优选轴与CMB四极和八极以及CMB运动偶极中的轴强烈对齐,这暗示了它们的非宇宙学起源。在实际观测中,前景残差是不可避免的,为了避免对结果的误解,应该适当地掩盖。在本文中,我们将之前的分析扩展到掩蔽的普朗克2015数据。通过定义一个类似的方向相关的统计屏蔽地图,我们找到一个首选的CMB奇偶不对称的方向,其中的轴也与发现在全天空分析。因此,我们关于CMB宇称破坏及其方向性的结论得到了证实。
Resolving the Planck-DESI tension by nonminimally coupled quintessence
Institute of Theoretical Physics, Chinese Academy of Sciences (CAS)(中国科学院理论物理研究所);University of Chinese Academy of Sciences (UCAS)(中国科学院大学);Institute of Fundamental Physics and Quantum Technology, Ningbo University(宁波大学基础物理与量子技术学院);School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences(中国科学院大学杭州高等研究院基础物理与数学科学学院);Asia Pacific Center for Theoretical Physics (APCTP)(亚太理论物理中心)
Resolving the Hubble Tension in the Early Dark Energy Framework with JWST and DESI Data
College of Sciences, Northeastern University(东北大学理学院);Department of Physics, Shanghai University(上海大学物理系);School of Fundamental Physics and Mathematical Sciences, Hangzhou Institute for Advanced Study, UCAS(中国科学院大学杭州高等研究院基础物理与数学科学学院);School of Physical Sciences, University of Chinese Academy of Sciences(中国科学院大学物理科学学院)
A gravitational constant transition within cepheids as supernovae calibrators can solve the Hubble tension
Indian Institute of Technology Bombay(印度理工学院孟买分校);University of Arizona(亚利桑那大学);Institute of Astronomy and Astrophysics, Academia Sinica(中央研究院天文及天文物理研究所)
The Serendipitous Axiodilaton: A Self-Consistent Recombination-Era Solution to the Hubble Tension
University of Sheffield(谢菲尔德大学);Kavli Institute for the Physics and Mathematics of the Universe (IPMU)(宇宙物理与数学卡弗里研究所);Perimeter Institute for Theoretical Physics(理论物理珀利默研究所);McMaster University(麦克马斯特大学);Dublin Institute for Advanced Studies(都柏林高等研究院)