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首页> 外文期刊>Astronomy and astrophysics >The Vimos VLT Deep Survey - Stellar mass segregation and large-scale galaxy environment in the redshift range 0.2$~<~{extit{z}}~<~$1.4
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The Vimos VLT Deep Survey - Stellar mass segregation and large-scale galaxy environment in the redshift range 0.2$~<~{extit{z}}~<~$1.4

机译:Vimos VLT深度调查-红移范围内的恒星质量偏析和大规模星系环境0.2 $〜<〜{ textit {z}}〜<〜$ 1.4

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Context. Hierarchical models of galaxy formation predict that the properties of a dark matter halo depend on the large-scale environment surrounding the halo. As a result of this correlation, we expect massive haloes to be present in larger number in overdense regions than in underdense ones. Given that a correlation exists between a galaxy stellar mass and the hosting dark matter halo mass, the segregation in dark matter halo mass should then result in a segregation in the distribution of stellar mass in the galaxy population. Aims. In this work we study the distribution of galaxy stellar mass and rest-frame optical color as a function of the large-scale galaxy distribution using the VLTVIMOSDeep Survey sample, in order to verify the presence of segregation in the properties of the galaxy population. Methods. We use VVDS redshift measurements and multi-band photometric data to derive estimates of the stellar mass, rest-frame optical color, and of the large-scale galaxy density, on a scale of approximately 8Mpc, for a sample of 5619galaxies in the redshift range 0.2 0.7. However, when we consider only galaxies in narrow bins of stellar mass, in order to exclude the effects of stellar mass segregation on galaxy properties, we no longer observe any significant color segregation. Key words: galaxies: formation - galaxies: evolution - galaxies: fundamental parameters - cosmology: observations
机译:上下文。星系形成的分层模型预测,暗物质晕的性质取决于晕周围的大规模环境。由于这种相关性,我们预计高密度区域中的大量光环要比低密度区域中的大量。假设星系恒星质量与宿主暗物质晕质量之间存在相关性,那么暗物质晕质量的分离将导致银河种群中恒星质量分布的分离。目的在这项工作中,我们使用VLTVIMOSDeep Survey样本研究了星系恒星质量和静止帧光学颜色的分布与大规模星系分布的关系,以验证银河系种群中是否存在偏析。方法。我们使用VVDS红移测量和多波段光度数据来得出恒星质量,静止帧光学色以及大规模星系密度(大约8Mpc)的估计,用于在红移范围内的5619个星系样本0.2 0.7时,颜色分离明显降低。但是,当我们仅考虑在恒星质量的狭窄区域中的星系时,为了排除恒星质量分离对银河特性的影响,我们不再观察到任何明显的颜色分离。关键词:星系:形成-星系:演化-星系:基本参数-宇宙学:观测

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