The chemical enrichment in the early Universe as probed by JWST via direct metallicity measurements at z ∼ 8

被引：228

作者：

Curti, Mirko ^{[1
,2
]}

D'Eugenio, Francesco ^{[1
,2
]}

Carniani, Stefano ^{[3
]}

Maiolino, Roberto ^{[1
,2
,4
]}

Sandles, Lester ^{[1
,2
]}

Witstok, Joris ^{[1
,2
]}

Baker, William M. ^{[1
,2
]}

Bennett, Jake S. ^{[1
,5
]}

Piotrowska, Joanna M. ^{[1
,2
]}

Tacchella, Sandro ^{[1
,2
]}

Charlot, Stephane ^{[6
]}

Nakajima, Kimihiko ^{[7
]}

Maheson, Gabriel ^{[1
,2
]}

Mannucci, Filippo ^{[8
]}

Amiri, Amirnezam ^{[8
,9
]}

Arribas, Santiago ^{[10
]}

Belfiore, Francesco ^{[8
]}

Bonaventura, Nina R. ^{[11
]}

Bunker, Andrew J. ^{[12
]}

Chevallard, Jacopo ^{[12
]}

Cresci, Giovanni ^{[8
]}

Curtis-Lake, Emma ^{[13
]}

Hayden-Pawson, Connor ^{[1
,2
]}

Jones, Gareth C. ^{[12
]}

Kumari, Nimisha ^{[14
]}

Laseter, Isaac ^{[15
]}

Looser, Tobias J. ^{[1
,2
]}

Marconi, Alessandro ^{[8
,9
]}

Maseda, Michael, V ^{[15
]}

Scholtz, Jan ^{[1
,2
]}

Smit, Renske ^{[16
]}

Ubler, Hannah ^{[1
,2
]}

Wallace, Imaan E. B. ^{[12
]}

机构：

[1] Univ Cambridge, Kavli Inst Cosmol, Madingley Rd, Cambridge CB3 0HA, England

[2] Univ Cambridge, Cavendish Lab, Astrophys Grp, 19 JJ Thompson Ave, Cambridge CB3 0HE, England

[3] Univ Pisa, Scuola Normale Super, Piazza Cavalieri 7, I-56126 Pisa, Italy

[4] UCL, Dept Phys & Astron, Gower St, London WC1E 6BT, England

[5] Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England

[6] Sorbonne Univ, Inst Astrophys Paris, UMR7095, UPMC CNRS, F-75014 Paris, France

[7] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[8] INAF Osservaiorio Asirofis Arcetri, Largo E Fermi 5, I-50125 Florence, Italy

[9] Univ Firenze, Dipartimento Fis & Astron, Via G Sansone 1, I-50125 Florence, Italy

[10] CSIC INTA, Ctr Astrobiol CAB, Cra Ajalvir Km 4, E-28850 Madrid, Spain

[11] Univ Copenhagen, Cosm Dawn Ctr, Niels Bohr Inst, Radmandsgade 62, DK-2200 Copenhagen N, Denmark

[12] Univ Oxford, Dept Phys, Denys Wilkinson Bldg,Keble Rd, Oxford OX1 3RH, England

[13] Univ Hertfordshire, Ctr Astrophys Res, Dept Phys Astron & Math, Hatfield AL10 9AB, Herts, England

[14] Space Telescope Sci Inst, AURA European Space Agcy, 3700 San Martin Dr, Baltimore, MD 21218 USA

[15] Univ Wisconsin, Dept Astron, 475 N Charter St, Madison, WI 53706 USA

[16] Liverpool John Moores Univ, Astrophys Res Inst, 146 Bmwnlow Hill, Liverpool L3 5RE, Merseyside, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2023年 / 518卷 / 01期

基金：

英国科学技术设施理事会; 欧洲研究理事会; 欧盟地平线“2020”;

关键词：

galaxies: abundances; galaxies: evolution; galaxies: general; galaxies: ISM; STAR-FORMING GALAXIES; MASS-METALLICITY; ILLUSTRISTNG SIMULATIONS; MOSDEF SURVEY; STELLAR POPULATIONS; EAGLE SIMULATIONS; LINE RATIOS; LY-ALPHA; EVOLUTION; ABUNDANCE;

D O I：

10.1093/mnras/stac2737

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyse the chemical properties of three z similar to 8 galaxies behind the galaxy cluster SMACSJ0723.3-7327, observed as part of the Early Release Observations programme of the James Webb Space Telescope. Exploiting [O III]lambda 4363 auroral line detections in NIRSpec spectra, we robustly apply the direct T-e method for the very first time at such high redshift, measuring metallicities ranging from extremely metal poor (12 + log(O/H)approximate to 7) to about one-third solar. We also discuss the excitation properties of these sources, and compare them with local strong-line metallicity calibrations. We find that none of the considered diagnostics match simultaneously the observed relations between metallicity and strong-line ratios for the three sources, implying that a proper re-assessment of the calibrations may be needed at these redshifts. On the mass-metallicity plane, the two galaxies at z similar to 7.6 (log(M-*/M-circle dot) = 8.1, 8.7) have metallicities that are consistent with the extrapolation of the mass-metallicity relation at z similar to 2-3, while the least massive galaxy at z similar to 8.5 (Log(M-*/M-circle dot) = 7.8) shows instead a significantly lower metallicity. The three galaxies show different level of offset relative to the Fundamental Metallicity Relation, with two of them (at z similar to 7.6) being marginally consistent, while the z similar to 8.5 source deviating significantly, being probably far from the smooth equilibrium between gas flows, star formation, and metal enrichment in place at later epochs.

引用

页码：425 / 438

页数：14

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