| Constraining Ω with the fluctuation of the local Hubble flow |
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| 作者单位： | National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China
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| 摘 要： | We present an analysis of the fluctuation of the local Hubble flow using 350 galaxies in the Local Volume (D＜5 Mpc, hereafter LV) with accurate measurements of distances, positions and radial velocities, and compare the results with the theoretical prediction of the local Hubble flow induced by density perturbations. This allows us to set a useful constraint on the local Ω parameters: ΩM～0.6 and ΩΛ～0.7, which may serve as compelling evidence for the existence of dark energy in the local Universe.
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| 关 键 词： | 哈勃流 波动 精确测量 径向速度 密度扰动 理论预测 暗能量 星系 |
Constraining Ω with the fluctuation of the local Hubble flow |
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| Authors: | Quan Guo Huan-Yuan Shan |
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| Institution: | [1]National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China [2]Graduate School of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | |
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| Keywords: | cosmology dark matter-cosmology large-scale structure of universegalaxies peculiar-techniques radial velocities |
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