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arXiv 1409.8100astro-ph.CO
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用密度梯度模拟的哈勃常数的各向异性

Anisotropy in the Hubble constant as modeled by density gradients

L. Zaninetti

摘要:

通过引入具有可变电子数密度的星系际等离子体,可以从理论的角度再现观测到的哈勃常数变化的全天图。采用边缘模型、自引力模型和Voronoi图模型作为自引力介质的骨架,再现了观测到的哈勃常数的平均值和方差。我们还分析了一个天文学家的模型的基础上的三维空间分布的星系所给出的2 MASS红移调查和自动引力莱恩-埃姆登($n=5$)的电子配置文件。在边长为100 Mpc的立方体中进行了涉及Voronoi图的模拟。利用2 MASS进行的模拟覆盖了红移小于0.05的范围。

英文摘要:

The all-sky maps of the observed variation of the Hubble constant can be reproduced from a theoretical point of view by introducing an intergalactic plasma with a variable number density of electrons. The observed averaged value and variance of the Hubble constant are reproduced by adopting a rim model, an auto-gravitating model, and a Voronoi diagrams model as the backbone for an auto-gravitating medium. We also analyze an astronomer's model based on the 3D spatial distribution of galaxies as given by the 2MASS Redshift Survey and an auto-gravitating Lane--Emden ($n=5$) profile of the electrons. The simulation which involves the Voronoi diagrams is done in a cubic box with sides of 100 Mpc. The simulation which involves the 2MASS covers the range of redshift smaller than 0.05.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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