Cosmic Voids and Biased Galaxy Formation

Cosmic Voids and Biased Galaxy Formation
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宇宙空洞和有偏差的星系形成

DOI:
10.1093/mnras/267.3.605
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发表时间:
1993
影响因子:
4.8
通讯作者:
D. Weinberg
D. Weinberg
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Blane Little;D. Weinberg

文献摘要

被引文献

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使用宇宙学 N 体模拟和空洞概率函数 (VPF),我们研究了大范围结构起源的各种初始高斯模型中空洞的统计特性。我们研究 VPF 对宇宙学参数、原初涨落功率谱以及星系形成假设的依赖性。我们特别关注 VPF 诊断偏向星系形成的能力 - 在高背景密度区域优先形成星系,并在低背景密度区域相应抑制星系形成。我们发现,VPF 对宇宙密度参数 Ω 0 和宇宙学常数 λ 0 不敏感,前提是波动在~8 h −1 Mpc 尺度上归一化为固定均方根振幅。
Using cosmological N-body simulations and the void probability function (VPF), we investigate the statistical properties of voids within a wide range of initially Gaussian models for the origin of large-scale structure. We study the dependence of the VPF on cosmological parameters, on the power spectrum of primordial fluctuations, and on assumptions about galaxy formation. We pay particular attention to the ability of the VPF to diagnose biased galaxy formation − the preferential formation of galaxies in regions of high background density and corresponding suppression of galaxy formation in regions of low background density. We find that the VPF is insensitive to the cosmic density parameter Ω 0 and the cosmological constant λ 0 , provided that fluctuations are normalized to a fixed rms amplitude on scales ∼8 h −1 Mpc