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A solar metallicity...
A solar metallicity galaxy at z > 7? Possible detection of the [N II] 122 mu m and [O III] 52 mu m lines
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- Killi, Meghana (author)
- Köpenhamns universitet,University of Copenhagen
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- Watson, Darach (author)
- Köpenhamns universitet,University of Copenhagen
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- Fujimoto, Seiji (author)
- Köpenhamns universitet,University of Copenhagen
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- Akins, Hollis (author)
- The University of Texas at Austin, USA
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- Knudsen, Kirsten, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Richard, Johan (author)
- Université de Lyon
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- Harikane, Yuichi (author)
- University of Tokyo, Japan,University College London (UCL)
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- Rigopoulou, Dimitra (author)
- University Of Oxford,European University Cyprus
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- Rizzo, Francesca (author)
- Köpenhamns universitet,University of Copenhagen
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- Ginolfi, Michele (author)
- Universita degli Studi di Firenze,University of Florence
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- Popping, Gergo (author)
- European Southern Observatory Santiago
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- Kokorev, Vasily (author)
- Köpenhamns universitet,University of Copenhagen
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(creator_code:org_t)
- 2023-03-06
- 2023
- English.
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In: Monthly Notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 521:2, s. 2526-2534
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https://doi.org/10.1...
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Abstract
Subject headings
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- We present the first detection of the [NII] 122 mu m and [O III ] 52 mu m lines for a reionization-epoch galaxy. Based on these lines and previous [C II ] 158 mu m and [O III ] 88 mu m measurements, using two different radiati ve transfer models of the interstellar medium, we estimate an upper limit on electron density of < 500 cm(-3) and an approximate gas-phase metallicity of Z/Z(circle dot) similar to 1.1 +/- 0.2 for A1689-zD1, a gravitationally lensed dusty galaxy at z = 7.133. Other measurements or indicators of metallicity so far in galaxy interstellar media at z greater than or similar to 6 are typically an order of magnitude lower than this. The unusually high metallicity makes A1689-zD1 inconsistent with the fundamental metallicity relation, although there is likely significant dust obscuration of the stellar mass, which may partly resolve the inconsistency. Given a solar metallicity, the dust-to-metals ratio is a factor of several lower than expected, hinting that galaxies be yond z similar to 7 may hav e lower dust formation efficiency . Finally , the inferred nitrogen enrichment compared to oxygen, on which the metallicity measurement depends, indicates that star formation in the system is older than about 250 Myr, pushing the beginnings of this galaxy to z > 10.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Matematik -- Sannolikhetsteori och statistik (hsv//swe)
- NATURAL SCIENCES -- Mathematics -- Probability Theory and Statistics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Fusion, plasma och rymdfysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Fusion, Plasma and Space Physics (hsv//eng)
Keyword
- galaxies:ISM
- galaxies:high-redshift
- submillimetre:galaxies
- ISM:abundances
- galaxies:individual:(A1689-zD1)
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Killi, Meghana
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Watson, Darach
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Fujimoto, Seiji
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Akins, Hollis
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Knudsen, Kirsten ...
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Richard, Johan
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show more...
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Harikane, Yuichi
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Rigopoulou, Dimi ...
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Rizzo, Francesca
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Ginolfi, Michele
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Popping, Gergo
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Kokorev, Vasily
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show less...
- About the subject
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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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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Mathematics
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and Probability Theo ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Fusion Plasma an ...
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Monthly Notices ...
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Chalmers University of Technology