TY - JOUR
T1 - JADES
T2 - Insights into the low-mass end of the mass-metallicity-SFR relation at 3 < z < 10 from deep JWST/NIRSpec spectroscopy
AU - Curti, Mirko
AU - Maiolino, Roberto
AU - Curtis-Lake, Emma
AU - Chevallard, Jacopo
AU - Carniani, Stefano
AU - D'Eugenio, Francesco
AU - Looser, Tobias J.
AU - Scholtz, Jan
AU - Charlot, Stephane
AU - Cameron, Alex
AU - Übler, Hannah
AU - Witstok, Joris
AU - Boyett, Kristian
AU - Laseter, Isaac
AU - Sandles, Lester
AU - Arribas, Santiago
AU - Bunker, Andrew
AU - Giardino, Giovanna
AU - Maseda, Michael V.
AU - Rawle, Tim
AU - Del Pino, Bruno Rodríguez
AU - Smit, Renske
AU - Willott, Chris J.
AU - Eisenstein, Daniel J.
AU - Hausen, Ryan
AU - Johnson, Benjamin
AU - Rieke, Marcia
AU - Robertson, Brant
AU - Tacchella, Sandro
AU - Williams, Christina C.
AU - Willmer, Christopher
AU - Baker, William M.
AU - Bhatawdekar, Rachana
AU - Egami, Eiichi
AU - Helton, Jakob M.
AU - Ji, Zhiyuan
AU - Kumari, Nimisha
AU - Perna, Michele
AU - Shivaei, Irene
AU - Sun, Fengwu
N1 - Publisher Copyright:
© 2024 EDP Sciences. All rights reserved.
PY - 2024/4/1
Y1 - 2024/4/1
N2 - We analysed the gas-phase metallicity properties of a sample of low-stellar-mass (log M?/M. 9) galaxies at 3 < z < 10 observed with JWST/NIRSpec as part of the JADES programme in its deep GOODS-S tier. By combining this sample with more massive galaxies at similar redshifts from other programmes, we study the scaling relations between stellar mass (M?), oxygen abundance (O/H), and star-formation rate (SFR) for 146 galaxies spanning three orders of magnitude in stellar mass and out to the epoch of early galaxy assembly. We find evidence for a shallower slope at the low-mass end of the mass-metallicity relation (MZR), with 12+log(O/H) = (7.72 ± 0.02) + (0.17 ± 0.03) log(M?/108 M ), in good agreement with the MZR probed by local analogues of high-redshift systems, such as the 'Green Pea' and 'Blueberry' galaxies. The inferred slope is well matched by models including 'momentum-driven' supernova (SN) winds, suggesting that feedback mechanisms in dwarf galaxies (and at high z) might be different from those in place at higher masses. The evolution in the normalisation is observed to be relatively mild compared to previous determinations of the MZR at z ∼ 3 (∼0.1−0.2 dex across the explored mass regime). We observe a deviation from the local fundamental metallicity relation (FMR) for our sample at high redshift, especially at z > 6, with galaxies significantly less enriched than predicted given their M? and SFR (with a median offset in log(O/H) of ∼0.5 dex, significant at ∼5σ). These observations are consistent with an enhanced stochasticity in the gas accretion and star-formation history of high-redshift systems, prompting us to reconsider the nature of the relationship between M?, O/H, and SFR in the early Universe.
AB - We analysed the gas-phase metallicity properties of a sample of low-stellar-mass (log M?/M. 9) galaxies at 3 < z < 10 observed with JWST/NIRSpec as part of the JADES programme in its deep GOODS-S tier. By combining this sample with more massive galaxies at similar redshifts from other programmes, we study the scaling relations between stellar mass (M?), oxygen abundance (O/H), and star-formation rate (SFR) for 146 galaxies spanning three orders of magnitude in stellar mass and out to the epoch of early galaxy assembly. We find evidence for a shallower slope at the low-mass end of the mass-metallicity relation (MZR), with 12+log(O/H) = (7.72 ± 0.02) + (0.17 ± 0.03) log(M?/108 M ), in good agreement with the MZR probed by local analogues of high-redshift systems, such as the 'Green Pea' and 'Blueberry' galaxies. The inferred slope is well matched by models including 'momentum-driven' supernova (SN) winds, suggesting that feedback mechanisms in dwarf galaxies (and at high z) might be different from those in place at higher masses. The evolution in the normalisation is observed to be relatively mild compared to previous determinations of the MZR at z ∼ 3 (∼0.1−0.2 dex across the explored mass regime). We observe a deviation from the local fundamental metallicity relation (FMR) for our sample at high redshift, especially at z > 6, with galaxies significantly less enriched than predicted given their M? and SFR (with a median offset in log(O/H) of ∼0.5 dex, significant at ∼5σ). These observations are consistent with an enhanced stochasticity in the gas accretion and star-formation history of high-redshift systems, prompting us to reconsider the nature of the relationship between M?, O/H, and SFR in the early Universe.
KW - Galaxy: evolution
KW - Galaxy: fundamental parameters
KW - ISM: abundances
KW - galaxies: ISM
KW - galaxies: abundances
KW - galaxies: high-redshift
UR - http://www.scopus.com/inward/record.url?scp=85190527074&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85190527074&partnerID=8YFLogxK
U2 - 10.1051/0004-6361/202346698
DO - 10.1051/0004-6361/202346698
M3 - Article
AN - SCOPUS:85190527074
SN - 0004-6361
VL - 684
JO - Astronomy and astrophysics
JF - Astronomy and astrophysics
M1 - A75
ER -