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ON THE MEASUREMENT OF THE HUBBLE CONSTANT IN A LOCAL LOW-DENSITY UNIVERSE

机译:局部低密度宇宙中恒常数的测量

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Astrophysical observations indicate that the "local universe" has a relatively lower matter density (Ω_0) than the predictions of the standard inflation cosmology and the large-scale motions of galaxies which provide a mean mass density to be very close to unity. In such a local underdense region, the Hubble expansion may not be representative of the global behavior. Utilizing an underdense sphere embedded in a flat universe as the model of our "local universe," we show that the local Hubble constant would be 1.2-1.4 times larger than the global value on scale of ~80 Mpc, depending on the variation of Ω_0. This may account for the recent measurements of the unpleasantly large Hubble constant of ~80 km s~(-1) Mpc~(-1) using the Cepheid variables in the Virgo cluster and the relative distance between Virgo and Coma cluster and removes the resulted apparent paradox of the age of our universe.
机译:天体物理观测表明,“局部宇宙”的物质密度(Ω_0)比标准膨胀宇宙学和星系的大规模运动的预测要低,后者提供的平均质量密度非常接近于统一。在这样的局部低密度区域,哈勃扩展可能无法代表全球行为。利用嵌入在平坦宇宙中的低密度球体作为我们的“局部宇宙”模型,我们发现,根据Ω_0的变化,局部哈勃常数将在〜80 Mpc范围内比全局值大1.2-1.4倍。 。这可能是由于使用处女座星团中的造父变星以及处女座与彗星星团之间的相对距离,最近测量了〜80 km s〜(-1)Mpc〜(-1)令人讨厌的大哈勃常数,并消除了结果我们宇宙时代的明显悖论。

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