Active galactic nucleus outflows and the matter power spectrum

被引：14

作者：

Levine, Robyn ^{[1
]}

Gnedin, Nickolay Y.

机构：

[1] Univ Colorado, JILA, Boulder, CO 80309 USA

[2] Fermilab Natl Accelerator Lab, Ctr Particle Astrophys, Batavia, IL 60510 USA

[3] Univ Chicago, Dept Astron & Astrophys, Chicago, IL 60637 USA

来源：

ASTROPHYSICAL JOURNAL | 2006年 / 649卷 / 02期

基金：

美国国家科学基金会;

关键词：

cosmological parameters; cosmology : theory; galaxies : active; intergalactic medium; large-scale structure of universe;

D O I：

10.1086/508370

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We attempt to evaluate the effects of AGN outflows on the amplitude of the matter power spectrum in a simple model of spherically symmetric outflows around a realistically clustered AGN population. We find that two competing effects influence the matter power spectrum in two opposite directions. First, AGN outflows move baryons from high- to low-density regions, decreasing the amplitude of the matter power spectrum by up to 20%. Second, high clustering of the AGN transfers the power from small to larger scales. The exact balance between these two effects depends on the details of outflows on small scales, and quantitative estimates will require much more sophisticated modeling than presented here.

引用

页码：L57 / L60

页数：4

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