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arXiv 1306.0091astro-ph.CO
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局部宇宙的宇宙学

Cosmography of the Local Universe

Helene M. Courtois, Daniel Pomarede, R. Brent Tully, Yehuda Hoffman, Denis Courtois

摘要:

宇宙的大尺度结构是一个由团簇、细丝和空洞组成的复杂网络。它的性质是由星系红移巡天和特殊速度的测量所告知的。维纳滤波重建恢复三维速度和总密度场。我们社区元素的丰富性通过复杂的可视化工具得以揭示。本文的一个关键组成部分是一个附带的电影,可以在http://irfu.cea.fr/cosmography或http://vimeo.com/pomarede/cosmography上观看和下载。翻译和缩放的能力有助于观众遵循三维结构,并把握不同尺度上的特征之间的关系,同时保持方向感。在场景之间溶解的能力提供了一种比较不同信息的技术,例如,观察到的星系分布,考虑选择效应的分布的平滑表示,观察到的特殊速度,这些速度的平滑和建模表示,以及推断的潜在密度场。在红移巡天观测中发现的大尺度结构与根据星系的径向奇特速度重建的结构之间的一致性强有力地支持了宇宙学的标准模型,其中结构形成于引力不稳定性,星系形成于势阱底部。

英文摘要:

The large scale structure of the universe is a complex web of clusters, filaments, and voids. Its properties are informed by galaxy redshift surveys and measurements of peculiar velocities. Wiener Filter reconstructions recover three-dimensional velocity and total density fields. The richness of the elements of our neighborhood are revealed with sophisticated visualization tools. A key component of this paper is an accompanying movie that can be viewed and downloaded at : http://irfu.cea.fr/cosmography or http://vimeo.com/pomarede/cosmography .The ability to translate and zoom helps the viewer follow structures in three dimensions and grasp the relationships between features on different scales while retaining a sense of orientation. The ability to dissolve between scenes provides a technique for comparing different information, for example, the observed distribution of galaxies, smoothed representations of the distribution accounting for selection effects, observed peculiar velocities, smoothed and modeled representations of those velocities, and inferred underlying density fields. The agreement between the large scale structure seen in redshift surveys and that inferred from reconstructions based on the radial peculiar velocities of galaxies strongly supports the standard model of cosmology where structure forms from gravitational instabilities and galaxies form at the bottom of potential wells.

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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