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arXiv 1003.0754astro-ph.CO
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星系星表的几何模型

A geometrical model for the catalogs of galaxies

Lorenzo Zaninetti

摘要:

由不规则的泊松Voronoi多面体的面形成的三维网络可能代表星系起源的主干。因此,星系目录的空间外观可以重现。模拟的星表是2dF星系红移巡天和亮星系第三参考星表。为了解释给定通量/星等下观测到的星系数量与红移的函数关系,应该从天文和理论的角度仔细研究星系的光度特性。Voronoi归一化体积的统计由两个分布建模,波江座超空被确定为属于Voronoi多面体的最大体积。在短尺度上采用Voronoi多面体的厚面框架,在大尺度上采用标准变元,模拟了星系的关联函数的行为。

英文摘要:

The 3D network originated by the faces of irregular Poissonian Voronoi Polyhedrons may represent the backbone on which the galaxies are originated. As a consequence the spatial appearance of the catalogs of galaxies can be reproduced. The selected catalogs to simulate are the 2dF Galaxy Redshift Survey and the Third Reference Catalog of Bright Galaxies. In order to explain the number of observed galaxies for a given flux/magnitude as a function of the redshift, the photometric properties of the galaxies should be carefully examined from both the astronomical and theoretical point of view. The statistics of the Voronoi normalized volume is modeled by two distributions and the Eridanus super-void is identified as the largest volume belonging to the Voronoi Polyhedron. The behavior of the correlation function for galaxies is simulated by adopting the framework of thick faces of Voronoi Polyhedrons on short scales, while adopting standard arguments on large scales.

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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