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Metal enrichment signatures of the first stars on high-z DLAs
Ma, Q.1,2,3; Maio, U.4; Ciardi, B.1; Salvaterra, R.5
2017-12-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume472Issue:3Pages:3532-3542
Corresponding AuthorMa, Q.(maqb@mpa-garching.mpg.de)
AbstractWe use numerical N-body hydrodynamical simulations with varying PopIII stellar models to investigate the possibility of detecting first star signatures with observations of high-redshift damped Lya absorbers (DLAs). The simulations include atomic and molecular cooling, star formation, energy feedback and metal spreading due to the evolution of stars with a range of masses and metallicities. Different initial mass functions (IMFs) and corresponding metaldependent yields and lifetimes are adopted to model primordial stellar populations. The DLAs in the simulations are selected according to either the local gas temperature (temperature selected) or the host mass (mass selected). We find that 3 per cent (40 per cent) of mass (temperature)-selected high-z (z = 5.5) DLAs retain signatures of pollution from PopIII stars, independent of the first star model. Such DLAs have low halo mass (< 109.6 M-circle dot), metallicity (< 10(-3) Z(circle dot)) and star formation rate (< 10(-1.5) M-circle dot yr(-1)). Metal abundance ratios of DLAs imprinted in the spectra of quasi-stellar object can be useful as tools to infer the properties of the polluting stellar generation and to constrain the first star mass ranges. Comparing the abundance ratios derived from our simulations to those observed in DLAs at z = 5, we find that most of these DLAs are consistent within errors with PopII star dominated enrichment and strongly disfavour the pollution pattern of very massive first stars (i.e. 100-500 M-circle dot). However, some of them could still result from the pollution of first stars in the mass range [0.1, 100] M-circle dot. In particular, we find that the abundance ratios from SDSS J1202+ 3235 are consistent with those expected from PopIII enrichment dominated by massive (but not extreme) first stars.
Keywordstars: Population III galaxies: abundances galaxies: high-redshift early Universe
DOI10.1093/mnras/stx1839
WOS KeywordLYMAN-ALPHA ABSORPTION ; ULTRA-DEEP FIELD ; SIMILAR-TO 6 ; HIGH-REDSHIFT ; STELLAR MASS ; POPULATION III ; LUMINOSITY FUNCTION ; DISK GALAXIES ; EVOLUTION ; SYSTEMS
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000413088400080
PublisherOXFORD UNIV PRESS
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Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/22788
Collection中国科学院紫金山天文台
Corresponding AuthorMa, Q.
Affiliation1.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.INAF, IASF Milano, Via E Bassini 15, I-20133 Milan, Italy
Recommended Citation
GB/T 7714
Ma, Q.,Maio, U.,Ciardi, B.,et al. Metal enrichment signatures of the first stars on high-z DLAs[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2017,472(3):3532-3542.
APA Ma, Q.,Maio, U.,Ciardi, B.,&Salvaterra, R..(2017).Metal enrichment signatures of the first stars on high-z DLAs.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,472(3),3532-3542.
MLA Ma, Q.,et al."Metal enrichment signatures of the first stars on high-z DLAs".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 472.3(2017):3532-3542.
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