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Accurate dust tempe...
Accurate dust temperature determination in a z = 7.13 galaxy
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- Bakx, Tom J.L.C. (author)
- National Astronomical Observatory of Japan,Nagoya University
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- Sommovigo, Laura (author)
- Scuola Normale Superiore di Pisa
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- Carniani, S. (author)
- Scuola Normale Superiore di Pisa
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- Ferrara, Andrea (author)
- Scuola Normale Superiore di Pisa
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- Akins, Hollis B. (author)
- Grinnell College
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- Fujimoto, S. (author)
- Niels Bohr Institute
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- Hagimoto, Masato (author)
- Nagoya University
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- Knudsen, Kirsten Kraiberg, 1976 (author)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Pallottini, Andrea (author)
- Scuola Normale Superiore di Pisa
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- Tamura, Y. (author)
- Nagoya University
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- Watson, Darach (author)
- Niels Bohr Institute
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(creator_code:org_t)
- 2021-09-09
- 2021
- English.
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In: Monthly Notices of the Royal Astronomical Society: Letters. - : Oxford University Press (OUP). - 1745-3925 .- 1745-3933. ; 508:1, s. L58-L63
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Abstract
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- We report ALMA Band 9 continuum observations of the normal, dusty star-forming galaxy A1689-zD1 at z = 7.13, resulting in a ∼4.6 σ detection at 702 GHz. For the first time, these observations probe the far-infrared spectrum shortward of the emission peak of a galaxy in the Epoch of Reionization (EoR). Together with ancillary data from earlier works, we derive the dust temperature, Td, and mass, Md, of A1689-zD1 using both traditional modified blackbody spectral energy density fitting, and a new method that relies only on the [C ii] 158 μm line and underlying continuum data. The two methods give Td = (42+13-7, 40+13-) K, and Md} = (1.7+1.3-0.7, 2.0+1.8-1.0), ×, 107, M⊙. Band 9 observations improve the accuracy of the dust temperature (mass) estimate by ∼50 per cent (6 times). The derived temperatures confirm the reported increasing Td-redshift trend between z = 0 and 8; the dust mass is consistent with a supernova origin. Although A1689-zD1 is a normal UV-selected galaxy, our results, implying that ∼85 per cent of its star-formation rate is obscured, underline the non-negligible effects of dust in EoR galaxies.
Subject headings
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Fysik -- Atom- och molekylfysik och optik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Atom and Molecular Physics and Optics (hsv//eng)
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Keyword
- dust, extinction
- galaxies: evolution
- galaxies: individual: (A1689-zD1)
- galaxies: formation
- submillimetre: galaxies
- galaxies: high-redshift
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Bakx, Tom J.L.C.
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Sommovigo, Laura
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Carniani, S.
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Ferrara, Andrea
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Akins, Hollis B.
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Fujimoto, S.
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show more...
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Hagimoto, Masato
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Knudsen, Kirsten ...
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Pallottini, Andr ...
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Tamura, Y.
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Watson, Darach
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- 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 Physical Science ...
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and Atom and Molecul ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Physical Science ...
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and Condensed Matter ...
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Monthly Notices ...
- By the university
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Chalmers University of Technology