A relation between the dark mass of elliptical galaxies and their shape
A relation between the dark mass of elliptical galaxies and their shape
复制标题
椭圆星系的暗质量与其形状之间的关系
DOI：
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发表时间：
2013
期刊：
影响因子：
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通讯作者：
A. Deur
中科院分区：
文献类型：
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作者：
A. Deur
我们已经研究了大量的椭圆星系，并发现它们的暗物质含量和可见形状的椭圆率之间存在相关性。星系被严格选择，因此只考虑典型的中等大小的椭圆星系。拒绝具有不寻常特征的Galerkin，以最大限度地减少点对点数据分散并避免系统偏差。从六个不同的技术提取银河系暗物质含量的数据被用来避免方法的偏见。对椭圆星系属性之间的相互关系进行了彻底的调查，以评估相关性是否源于观测偏差，但没有这样的起源可以确定。从表面上看，发现的相关性意味着在相同的光度下，更圆的中等大小的椭圆星系似乎比更平的椭圆星系包含更少的暗物质，例如，更圆的星系平均质量比更平的星系小四倍。这在宇宙结构形成的传统模型中是令人困惑的。
We have studied a large number of elliptical galaxies and found a correlation between their dark matter content and the ellipticity of their visible shape. The galaxies were strictly selected so that only typical medium-size elliptical galaxies were considered. Galaxies with unusual characteristics were rejected to minimize point-to-point data scatter and avoid systematic biases. Data from six different techniques of extracting the galactic dark matter content were used to avoid methodological biases. A thorough investigation of the interrelation between attributes of elliptical galaxies was carried out to assess whether the correlation originates from an observational bias, but no such origin could be identified. At face value, the correlation found implies that at equal luminosities, rounder medium-size elliptical galaxies appear to contain less dark matter than flatter elliptical galaxies, e.g. the rounder galaxies are on average four times less massive than the flatter ones. This is puzzling in the context of the conventional model of cosmological structure formation.
影响因子：
8.7
作者：
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者：
Wright, E. L.