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The Gas and Stellar...
The Gas and Stellar Content of a Metal-poor Galaxy at z = 8.496 as Revealed by JWST and ALMA
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- Heintz, K. E. (author)
- Niels Bohr Institute
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- Giménez-Arteaga, C. (author)
- Niels Bohr Institute
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- Fujimoto, S. (author)
- The University of Texas at Austin, USA,Niels Bohr Institute
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- Brammer, G. (author)
- Niels Bohr Institute
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- Espada, D. (author)
- Universidad de Granada
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- Gillman, S. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- González-López, J. (author)
- Las Campanas Observatory,Universidad Diego Portales,Diego Portales University
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- Greve, T. R. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Harikane, Yuichi (author)
- University of Tokyo, Japan
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- Hatsukade, B. (author)
- University of Tokyo, Japan
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- Knudsen, Kirsten, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Koekemoer, Anton M. (author)
- Space Telescope Science Institute (STScI)
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- Kohno, K. (author)
- University of Tokyo, Japan
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- Kokorev, V. (author)
- Rijksuniversiteit Groningen,University of Groningen
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- Lee, M. M. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Magdis, Georgios E. (author)
- Niels Bohr Institute,Danmarks Tekniske Universitet,Technical University of Denmark
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- Nelson, E. J. (author)
- University of Colorado at Boulder
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- Rizzo, F. (author)
- Niels Bohr Institute
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- Sanders, R. L. (author)
- University of California
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- Schaerer, D. (author)
- Université de Genève,University of Geneva,Institut de Recherche en Astrophysique et Planétologie (IRAP)
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- Shapley, A. E. (author)
- University of California
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- Strait, V. B. (author)
- Niels Bohr Institute
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- Toft, Sune (author)
- Niels Bohr Institute
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- Valentino, F. (author)
- Niels Bohr Institute,European Southern Observatory (ESO)
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- Wel, A. van der (author)
- Universiteit Gent,Ghent university
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- Vijayan, A. P. (author)
- Danmarks Tekniske Universitet,Technical University of Denmark
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- Watson, D. (author)
- Niels Bohr Institute
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- Bauer, F. E. (author)
- Pontificia Universidad Catolica de Chile,Instituto Milenio de Astrofísica,Millennium Institute of Astrophysics
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- Christiansen, C. R. (author)
- Niels Bohr Institute
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- Wilson, S. N. (author)
- Niels Bohr Institute
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(creator_code:org_t)
- 2023-02-15
- 2023
- English.
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In: Astrophysical Journal Letters. - : American Astronomical Society. - 2041-8213 .- 2041-8205. ; 944:2
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https://doi.org/10.3...
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Abstract
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- We present a joint analysis of the galaxy S04590 at z = 8.496 based on NIRSpec, NIRCam, and NIRISS observations obtained as part of the Early Release Observations program of the James Webb Space Telescope (JWST) and the far-infrared [C ii] 158 μm emission line detected by dedicated Atacama Large Millimeter/submillimeter Array (ALMA) observations. We determine the physical properties of S04590 from modeling of the spectral energy distribution (SED) and through the redshifted optical nebular emission lines detected with JWST/NIRSpec. The best-fit SED model reveals a low-mass (M ⋆ = 107.2-108 M ⊙) galaxy with a low oxygen abundance of 12 + log ( O / H ) = 7.16 − 0.12 + 0.10 derived from the strong nebular and auroral emission lines. Assuming that [C ii] effectively traces the interstellar medium, we estimate the total gas mass of the galaxy to be M gas = (8.0 ± 4.0) × 108 M ⊙ based on the luminosity and spatial extent of [C ii]. This yields an exceptionally high gas fraction, f gas = M gas/(M gas + M ⋆) ≳ 90%, though one still consistent with the range expected for low metallicity. We further derive the metal mass of the galaxy based on the gas mass and gas-phase metallicity, which we find to be consistent with the expected metal production from Type II supernovae. Finally, we make the first constraints on the dust-to-gas (DTG) and dust-to-metal (DTM) ratios of galaxies in the epoch of reionization at z ≳ 6, showing overall low mass ratios of logDTG < −3.8 and logDTM < −0.5, though they are consistent with established scaling relations and in particular with those of the local metal-poor galaxy I Zwicky 18. Our analysis highlights the synergy between ALMA and JWST in characterizing the gas, metal, and stellar content of the first generation of galaxies.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik -- Annan kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering -- Other Chemical Engineering (hsv//eng)
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Metallurgi och metalliska material (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Metallurgy and Metallic Materials (hsv//eng)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Heintz, K. E.
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Giménez-Arteaga, ...
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Fujimoto, S.
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Brammer, G.
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Espada, D.
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Gillman, S.
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show more...
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González-López, ...
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Greve, T. R.
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Harikane, Yuichi
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Hatsukade, B.
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Knudsen, Kirsten ...
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Koekemoer, Anton ...
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Kohno, K.
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Kokorev, V.
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Lee, M. M.
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Magdis, Georgios ...
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Nelson, E. J.
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Rizzo, F.
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Sanders, R. L.
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Schaerer, D.
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Shapley, A. E.
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Strait, V. B.
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Toft, Sune
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Valentino, F.
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Wel, A. van der
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Vijayan, A. P.
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Watson, D.
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Bauer, F. E.
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Christiansen, C. ...
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Wilson, S. N.
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Astronomy Astrop ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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and Chemical Enginee ...
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and Other Chemical E ...
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- ENGINEERING AND TECHNOLOGY
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ENGINEERING AND ...
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Chalmers University of Technology