Finding the stars that reionized the Universe

被引：0
|
作者：
Sharma, Mahavir [1 ]
Theuns, Tom [1 ]
Frenk, Carlos [1 ]
机构：
[1] Univ Durham, Dept Phys, Inst Computat Cosmol, South Rd, Durham DH1 3LE, England
来源：
ASTROMETRY AND ASTROPHYSICS IN THE GAIA SKY | 2018年 / 12卷 / S330期
关键词：
cosmology: theory; galaxies: evolution; Galaxy: formation; stars: statistics;
D O I：
10.1017/S1743921317006020
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We study the abundance of the remnants of stars that reionized the Universe in galaxies in the present day Universe using the EAGLE cosmological hydrodynamical simulation. High mass galaxies contain most of these 'reionizers'. The fractional number of galaxies that do not host reionizers increases with decreasing stellar mass M-*. For the galaxies that host reionizers, the fraction of mass of the galaxy in reionizers increases with decreasing M-*, such that the fraction is low (similar to 10(-4)) for high mass galaxies and can be as high as 0.1 in low mass galaxies, M-* <= 10(7) M-circle dot. In Milky-Way like galaxies, the distribution of reionizers is spatially more extended than that of normal stars.
引用
收藏
页码：253 / 254
页数：2
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