Effective Dark Matter Halo Catalog in f(R) Gravity.
Effective Dark Matter Halo Catalog in f(R) Gravity.
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f(R) 引力中的有效暗物质晕目录。
DOI：
10.1103/physrevlett.115.071306
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发表时间：
2015
影响因子：
8.6
通讯作者：
L. Guzzo
中科院分区：
文献类型：
--
作者：
Jian;A. Hawken;Baojiu Li;L. Guzzo
介绍了在f（R）引力场中建立有效暗物质晕星表的思想，该星表是利用有效密度场建立的。通过一系列高分辨率N体模拟，我们发现f（R）引力有效星表中晕的动力学性质，如密度分布、速度色散、比角动量和自旋等，与具有宇宙学常数（ΛCDM）的冷暗物质模型中晕的动力学性质非常接近.因此，当使用有效晕时，f（R）模型可以被视为ΛCDM模型。这一有效星表为研究f（R）宇宙学中的重子物理、星系晕占据分布乃至半解析星系形成提供了一种方便的途径。
We introduce the idea of an effective dark matter halo catalog in f(R) gravity, which is built using the effective density field. Using a suite of high resolution N-body simulations, we find that the dynamical properties of halos, such as the distribution of density, velocity dispersion, specific angular momentum and spin, in the effective catalog of f(R) gravity closely mimic those in the cold dark matter model with a cosmological constant (ΛCDM). Thus, when using effective halos, an f(R) model can be viewed as a ΛCDM model. This effective catalog therefore provides a convenient way for studying the baryonic physics, the galaxy halo occupation distribution and even semianalytical galaxy formation in f(R) cosmologies.