Dynamical evolution of topology of large-scale structure. [in distribution of galaxies]
Dynamical evolution of topology of large-scale structure. [in distribution of galaxies]
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DOI：
10.1086/170445
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发表时间：
1991-09
期刊：
影响因子：
--
通讯作者：
Changbom Park;J. Gott
中科院分区：
文献类型：
--
作者：
Changbom Park;J. Gott
研究了统计偏差和引力演化对该属的非线性影响。通过在初始条件下实际识别高于固定阈值的星系大小的峰值，并跟踪它们的后续演化，首次挑选出有偏差的星系子集。发现在标准冷暗物质(CDM)模型中，星系位置的统计偏差导致星系亏格曲线的不对称性，与引力演化的耦合导致中等非线性区域的亏格曲线左移。由于密度场中强烈的位相关联，引力演化本身降低了亏格曲线的幅度，并且也产生了曲线的不对称性。关于CDM和热暗物质模型的质量密度场亏格的结果与Melott，Weinberg和Gott(1987)先前的工作一致。
The nonlinear effects of statistical biasing and gravitational evolution on the genus are studied. The biased galaxy subset is picked for the first time by actually identifying galaxy-sized peaks above a fixed threshold in the initial conditions, and their subsequent evolution is followed. It is found that in the standard cold dark matter (CDM) model the statistical biasing in the locations of galaxies produces asymmetry in the genus curve and coupling with gravitational evolution gives rise to a shift in the genus curve to the left in moderately nonlinear regimes. Gravitational evolution alone reduces the amplitude of the genus curve due to strong phase correlations in the density field and also produces asymmetry in the curve. Results on the genus of the mass density field for both CDM and hot dark matter models are consistent with previous work by Melott, Weinberg, and Gott (1987).