Large-scale impact of the cosmological population of expanding radio galaxies

被引：15
|
作者：
Barai, Paramita [1 ]
机构：
[1] Univ Laval, Dept Phys Genie Phys & Optique, Quebec City, PQ G1K 7P4, Canada
来源：
ASTROPHYSICAL JOURNAL LETTERS | 2008年 / 682卷 / 01期
关键词：
galaxies : active; galaxies : jets; methods : n-body simulations;
D O I：
10.1086/591029
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We seek to compute the fraction of the volume of the universe filled by expanding cocoons of the cosmological population of radio galaxies over the Hubble time as well as the magnetic field infused by them, in order to assess their importance in the cosmic evolution of the universe. Using N-body Lambda CDM simulations, radio galaxies distributed according to the observed radio luminosity function are allowed to evolve in a cosmological volume as using well-defined prescriptions for their expansion. We find that the radio galaxies permeate 10%-30% of the total volume with similar to 10(-8) G magnetic field by the present epoch.
引用
收藏
页码：L17 / L20
页数：4
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