Constraining the PopIII IMF with high-z GRBs
文献类型:期刊论文
作者 | Ma, Q.1,2,3; Maio, U.4; Ciardi, B.1; Salvaterra, R.5 |
刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY |
出版日期 | 2017-04-01 |
卷号 | 466期号:1页码:1140-1148 |
ISSN号 | 0035-8711 |
关键词 | gamma-ray burst: general stars: Population III cosmology: theory dark ages, reionization first stars early Universe |
DOI | 10.1093/mnras/stw3159 |
英文摘要 | We study the signatures of enrichment from PopIII stars in observations of PopII GRBs (GRBIIs) at high redshift by using numerical N-body/hydrodynamical simulations including atomic and molecular cooling, star formation and metal spreading from stellar populations with different initial mass functions (IMFs), yields and lifetimes. PopIII and PopII star formation regimes are followed simultaneously and both a top-heavy and a Salpeter-like IMF for pristine PopIII star formation are adopted. We find that the fraction of GRBIIs hosted in a medium previously enriched by PopIII stars (PopIII-dominated) is model-independent. Typical abundance ratios, such as [Si/O] versus[C/O] and [Fe/C] versus[Si/C], can help to disentangle enrichment from massive and intermediate PopIII stars, while low-mass first stars are degenerate with regular PopII generations. The properties of galaxies hosting PopIII-dominated GRBIIs are not very sensitive to the particular assumption on the mass of the first stars. |
WOS关键词 | GAMMA-RAY BURST ; INTERMEDIATE-MASS STARS ; POPULATION-III STARS ; HIGH-REDSHIFT GRBS ; 1ST STARS ; CHEMICAL ABUNDANCES ; LUMINOSITY FUNCTION ; BLACK-HOLES ; EVOLUTION ; METAL |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | OXFORD UNIV PRESS |
WOS记录号 | WOS:000398112400079 |
源URL | [http://libir.pmo.ac.cn/handle/332002/23174] |
专题 | 中国科学院紫金山天文台 |
通讯作者 | Ma, Q. |
作者单位 | 1.Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85748 Garching, Germany 2.Chinese Acad Sci, Purple Mt Observ, Nanjing 210008, Jiangsu, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Leibniz Inst Astrophys, Sternwarte 16, D-14482 Potsdam, Germany 5.IASF Milano, INAF, Via E Bassini 15, I-20133 Milan, Italy |
推荐引用方式 GB/T 7714 | Ma, Q.,Maio, U.,Ciardi, B.,et al. Constraining the PopIII IMF with high-z GRBs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,466(1):1140-1148. |
APA | Ma, Q.,Maio, U.,Ciardi, B.,&Salvaterra, R..(2017).Constraining the PopIII IMF with high-z GRBs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,466(1),1140-1148. |
MLA | Ma, Q.,et al."Constraining the PopIII IMF with high-z GRBs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 466.1(2017):1140-1148. |
入库方式: OAI收割
来源:紫金山天文台
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