REVISITING THE FIRST GALAXIES: THE EPOCH OF POPULATION III STARS

被引：33

作者：

Muratov, Alexander L. ^{[1
]}

Gnedin, Oleg Y. ^{[1
]}

Gnedin, Nickolay Y. ^{[2
,3
,4
,5
]}

Zemp, Marcel ^{[1
,6
]}

机构：

[1] Univ Michigan, Dept Astron, Ann Arbor, MI 48109 USA

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

[3] Univ Chicago, Kavli Inst Cosmol Phys, Chicago, IL 60637 USA

[4] Univ Chicago, Enrico Fermi Inst, Chicago, IL 60637 USA

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

[6] Peking Univ, Kavli Inst Astron & Astrophys, Beijing 100871, Peoples R China

来源：

ASTROPHYSICAL JOURNAL | 2013年 / 773卷 / 01期

基金：

美国国家科学基金会;

关键词：

cosmology: theory; galaxies: evolution; galaxies: formation; methods: numerical; stars: formation; INITIAL MASS FUNCTION; PAIR-INSTABILITY SUPERNOVAE; WEBB-SPACE-TELESCOPE; COSMOLOGICAL SIMULATIONS; PRIMORDIAL GAS; STELLAR POPULATIONS; CHEMICAL ENRICHMENT; COSMIC-RAYS; UNIVERSE; FRAGMENTATION;

D O I：

10.1088/0004-637X/773/1/19

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We investigate the transition from primordial Population III (Pop III) star formation to normal Pop II star formation in the first galaxies using new cosmological hydrodynamic simulations. We find that while the first stars seed their host galaxies with metals, they cannot sustain significant outflows to enrich the intergalactic medium, even assuming a top-heavy initial mass function. This means that Pop III star formation could potentially continue until z approximate to 6 in different unenriched regions of the universe, before being ultimately shut off by cosmic reionization. Within an individual galaxy, the metal production and stellar feedback from Pop II stars overtake Pop III stars in 20-200 Myr, depending on galaxy mass.

引用

页数：9

共 50 条

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