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arXiv 1707.04096astro-ph.COastro-ph.GA
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晕偏差对质量和环境的依赖性

Dependence of halo bias on mass and environment

Jingjing Shi, Ravi K. Sheth

摘要:

最简单的晕偏性分析假设晕质量单独决定晕聚集。然而,如果大尺度环境是固定的,那么晕聚类几乎完全由环境决定,并且几乎完全与晕质量无关。我们展示原因。我们的分析是有用的研究,使用的环境依赖性集群约束宇宙学和星系形成模型。它还显示了为什么星系属性和环境之间的许多相关性仅仅是晕和它们的环境之间的潜在相关性的结果,并提供了一个量化这种遗传相关性的框架。

英文摘要:

The simplest analyses of halo bias assume that halo mass alone determines halo clustering. However, if the large scale environment is fixed, then halo clustering is almost entirely determined by environment, and is almost completely independent of halo mass. We show why. Our analysis is useful for studies which use the environmental dependence of clustering to constrain cosmological and galaxy formation models. It also shows why many correlations between galaxy properties and environment are merely consequences of the underlying correlations between halos and their environments, and provides a framework for quantifying such inherited correlations.

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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