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Evidence for Dark Energy from the Cosmic Microwave Background Alone Using the Atacama Cosmology Telescope Lensing Measurements

机译:使用Atacama宇宙学望远镜镜头测量获得的单独来自宇宙微波背景的暗能量的证据

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摘要

For the first time, measurements of the cosmic microwave background radiation (CMB) alone favor cosmologies with w = - 1 dark energy over models without dark energy at a 3.2-sigma level. We demonstrate this by combining the CMB lensing deflection power spectrum from the Atacama Cosmology Telescope with temperature and polarization power spectra from the Wilkinson Microwave Anisotropy Probe. The lensing data break the geometric degeneracy of different cosmological models with similar CMB temperature power spectra. Our CMB-only measurement of the dark energy density Ω_Λ confirms other measurements from supernovae, galaxy clusters, and baryon acoustic oscillations, and demonstrates the power of CMB lensing as a new cosmological tool.
机译:第一次,宇宙微波本底辐射(CMB)的测量仅支持w =-1暗能量的宇宙学,而不是没有3.2 sigma暗能量的模型。我们通过结合来自阿塔卡马宇宙望远镜的CMB透镜偏转功率谱与来自威尔金森微波各向异性探测器的温度和极化功率谱来证明这一点。透镜数据打破了具有相似CMB温度功率谱的不同宇宙学模型的几何退化。我们仅对CMB进行的暗能量密度Ω_Λ的测量就可以证实来自超新星,星系团和重子声振荡的其他测量结果,并证明了CMB透镜作为一种新的宇宙学工具的力量。

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