Journal article
Diverse Oxygen Abundance in Early Galaxies Unveiled by Auroral Line Analysis with JWST
T Morishita, M Stiavelli, C Grillo, P Rosati, S Schuldt, M Trenti, P Bergamini, K Boyett, RR Chary, N Leethochawalit, G Roberts-Borsani, T Treu, E Vanzella
Astrophysical Journal | Published : 2024
Abstract
We present deep JWST NIRSpec observations in the sight line of MACS J1149.5+2223, a massive cluster of galaxies at z = 0.54. We report the spectroscopic redshift of 28 sources at 3 < z < 9.1, including nine sources with the detection of the O III λ 4363 auroral line. Combining these with 16 O III λ 4363 -detected sources from publicly available JWST data, our sample consists of 25 galaxies with robust gas-phase metallicity measurements via the direct method. We observe a positive correlation between stellar mass and metallicity, with an ∼0.5 dex offset down below the local relation. Interestingly, we find a larger-than-expected scatter of ∼0.3 dex around the relation, which cannot be explain..
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Grants
Awarded by Space Telescope Science Institute
Funding Acknowledgements
We wish to thank the anonymous referee for the careful reading of the manuscript and constructive comments. Some/all of the data presented in this paper were obtained from the Mikulski Archive for Space Telescopes (MAST) at the Space Telescope Science Institute. The specific observations analyzed can be accessed via the MAST website. 14 14 doi:10.17909/q8cd-2q22 We acknowledge support for this work under NASA grant 80NSSC22K1294. C.G., P.R., and S.S. acknowledge support through grants MIUR2017 WSCC32 and MIUR2020 SKSTHZ. K.B. and M.T. are supported by the Australian Research Council Center of Excellence for All Sky Astrophysics in 3 Dimensions (ASTRO 3D), through project No. CE170100013.