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New evidence for lack of CMB power on large scales |
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| Authors: | LIU Hao & LI TiPei Key Laboratory of Particle Astrophysics |
| Institution: | LIU Hao1 & LI TiPei1,2,3 1 Key Laboratory of Particle Astrophysics,Institute of High Energy Physics,Chinese Academy of Sciences,Beijing 100049,China,2 Department of Physics & Center for Astrophysics,Tsinghua University,Beijing 100084,3 Department of Engineering Physics & Center for Astrophysics |
| Abstract: | A digitalized temperature map is recovered from the first light sky survey image published by the Planck team, from which an angular power spectrum of the cosmic microwave background (CMB) is derived. The amplitudes of the low multipoles (low-l) measured from the preliminary Planck power spectrum are significantly lower than those reported by the WMAP team. Possible systematical effects are far from enough to explain the observed low-l differences. |
| Keywords: | cosmology cosmic microwave background data analysis |
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