Extreme emission line galaxies detected in JADES JWST/NIRSpec - I. Inferred galaxy properties

被引：16

作者：

Boyett, Kit ^{[1
,2
,3
]}

Bunker, Andrew J. ^{[3
]}

Curtis-Lake, Emma ^{[4
]}

Chevallard, Jacopo ^{[3
]}

Cameron, Alex J. ^{[3
]}

Jones, Gareth C. ^{[3
]}

Saxena, Aayush ^{[3
,5
]}

Charlot, Stephane ^{[6
]}

Curti, Mirko ^{[7
]}

Wallace, Imaan E. B. ^{[3
]}

Arribas, Santiago ^{[8
]}

Carniani, Stefano ^{[9
]}

Willott, Chris ^{[10
]}

Alberts, Stacey ^{[11
]}

Eisenstein, Daniel J. ^{[12
]}

Hainline, Kevin ^{[11
]}

Hausen, Ryan ^{[13
]}

Johnson, Benjamin D. ^{[12
]}

Rieke, Marcia ^{[11
]}

Robertson, Brant ^{[14
]}

Stark, Daniel P. ^{[11
]}

Tacchella, Sandro ^{[15
,16
]}

Williams, Christina C. ^{[17
]}

Chen, Zuyi ^{[11
]}

Egami, Eiichi ^{[11
]}

Endsley, Ryan ^{[18
]}

Kumari, Nimisha ^{[19
]}

Laseter, Isaac ^{[15
,20
]}

Looser, Tobias J. ^{[16
]}

Maseda, Michael, V ^{[20
]}

Scholtz, Jan ^{[15
,16
]}

Shivaei, Irene ^{[8
]}

Simmonds, Charlotte ^{[15
,16
]}

Smit, Renske ^{[21
]}

Uebler, Hannah ^{[15
,16
,22
]}

Witstok, Joris ^{[23
]}

机构：

[1] Univ Melbourne, Sch Phys, Parkville, Vic 3010, Australia

[2] ARC Ctr Excellence All Sky Astrophys 3 Dimens AST, Parkville, Vic 3010, Australia

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

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

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

[6] Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France

[7] European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany

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

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

[10] NRC Herzberg, 5071 West Saanich Rd, Victoria, BC V9E 2E7, Canada

[11] Univ Arizona, Steward Observ, 933 North Cherry Ave, Tucson, AZ 85721 USA

[12] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 USA

[13] Johns Hopkins Univ, Dept Phys & Astron, 3400 North Charles St, Baltimore, MD 21218 USA

[14] Univ Calif Santa Cruz, Dept Astron & Astrophys, 1156 High St, Santa Cruz, CA 96054 USA

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

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

[17] NSFs Natl Opt Infrared Astron Res Lab, 950 North Cherry Ave, Tucson, AZ 85719 USA

[18] Univ Texas Austin, Dept Astron, Austin, TX 78712 USA

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

[20] Univ Wisconsin, Dept Astron, 475 North Charter St, Madison, WI 53706 USA

[21] Liverpool John Moores Univ, Astrophys Res Inst, 146 Brownlow Hill, Liverpool L3 5RF, Merseyside, England

[22] Max Planck Inst Extraterr Phys MPE, Giessenbachstr 1, D-85748 Garching, Germany

[23] Univ Copenhagen, Cosm Dawn Ctr DAWN, Niels Bohr Inst, Jagtvej 128, DK-2200 Copenhagen N, Denmark

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 535卷 / 02期

基金：

澳大利亚研究理事会; 英国科学技术设施理事会; 欧洲研究理事会; 新加坡国家研究基金会; 美国国家科学基金会;

关键词：

galaxies: high-redshift; star formation; evolution; BURSTY STAR-FORMATION; EQUIVALENT WIDTH DISTRIBUTION; GIANT MOLECULAR CLOUDS; ALPHA ESCAPE FRACTION; LYMAN BREAK GALAXIES; ULTRA DEEP FIELD; O III EMITTERS; LY-ALPHA; JWST NIRCAM; H-BETA;

D O I：

10.1093/mnras/stae2430

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Extreme emission line galaxies (EELGs) exhibit large equivalent widths (EW) in their rest-optical emission lines ([O III]lambda 5007 or H alpha rest-frame EW>750 angstrom) which can be tied to a recent upturn in star formation rate (SFR), due to the sensitivity of the nebular line emission and the rest-optical continuum to young (<10 Myr) and evolved stellar populations, respectively. By studying a sample of 85 star-forming galaxies (SFGs), spanning the redshift and magnitude interval 3<z<9.5 and -16>M-UV>-21, in the JWST Advanced Deep Extragalactic Survey (JADES) with NIRSpec/prism spectroscopy, we determine that SFGs initiate an EELG phase when entering a significant burst of star formation, with the highest EWs observed in EELGs with the youngest luminosity-weighted ages (<5 Myr) and the highest burst intensity (those with the greatest excess between their current and long-term average SFR). We spectroscopically confirm that a greater proportion of SFGs are in an EELG phase at high redshift in our UV-selected sample (61 +/- 4 per cent in our z>5.7 high-redshift bin, compared to 23(-1)(+4)% in our lowest redshift bin 3<z<4.1) due to the combined evolution of metallicity, ionization parameter, and star formation histories with redshift. We report that the EELGs within our sample exhibit a higher average ionization efficiency (log(10)(xi(HII)(ion)/erg(-1)Hz)=25.5 +/- 0.2) than the non-EELGs. High-redshift EELGs therefore comprise a population of efficient ionizing photon producers. Additionally, we report that 53 per cent (9/17) of EELGs at z>5.7 have observed Ly alpha emission, potentially lying within large ionized regions. The high detection rate of Ly alpha emitters in our EELG selection suggests that the physical conditions associated with entering an EELG phase also promote the escape of Ly alpha photons.

引用

页码：1796 / 1828

页数：33

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