Physics of star-formation history and the luminosity function of galaxies therefrom

被引：4
作者：
Fukugita, Masataka [1 ]
Kawasaki, Masahiro [2 ]
机构：
[1] Univ Tokyo, Kavli Inst Phys & Math Universe, Kashiwa, Chiba 2778583, Japan
[2] Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan
来源：
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2022年 / 513卷 / 01期
关键词：
galaxies: formation; galaxies: luminosity function; mass function; dark ages; reionization; first stars; PARTICLE HYDRODYNAMICS; LYMAN CONTINUUM; GAS CLOUDS; REIONIZATION; EVOLUTION; EPOCH; FRAGMENTATION; IONIZATION; DEPENDENCE; DYNAMICS;
D O I：
10.1093/mnras/stac774
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that the star-formation history, the reionization history and the present luminosity function of galaxies are reproduced in a simple gravitational collapse model within the ACDM regime to an almost quantitative accuracy when the physical conditions, the Jeans criterion and the cooling process are taken into account. Taking a reasonable set of model parameters, the reionization takes place sharply at about redshift 1 + z similar or equal to 7.5, and the resulting luminosity function turns off at L similar or equal to 10(10.7) L-circle dot, showing the consistency between the star-formation history and the reionization of the Universe. The model gives the total amount of stars Omega(star) = 0.004 in units of the critical density, compared with the observational value of 0.0044 with a recycling factor of 1.6. In order to account for the observed star-formation rate and the present luminosity function, the star-formation efficiency is not halo-mass-independent but has a maximum at the halo mass similar or equal to 10(12) M-circle dot and is suppressed for both lower- and higher-mass haloes.
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收藏
页码：8 / 14
页数：7
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