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Accurate dust tempe...
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Bakx, Tom J.L.C.National Astronomical Observatory of Japan,Nagoya University
(author)
Accurate dust temperature determination in a z = 7.13 galaxy
- Article/chapterEnglish2021
Publisher, publication year, extent ...
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2021-09-09
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Oxford University Press (OUP),2021
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electronicrdacarrier
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LIBRIS-ID:oai:research.chalmers.se:c5475cfd-0b22-48a4-9075-13877354d1a0
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https://doi.org/10.1093/mnrasl/slab104DOI
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https://research.chalmers.se/publication/526672URI
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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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.
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Sommovigo, LauraScuola Normale Superiore di Pisa
(author)
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Carniani, S.Scuola Normale Superiore di Pisa
(author)
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Ferrara, AndreaScuola Normale Superiore di Pisa
(author)
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Akins, Hollis B.Grinnell College
(author)
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Fujimoto, S.Niels Bohr Institute
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Hagimoto, MasatoNagoya University
(author)
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Knudsen, Kirsten Kraiberg,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kraiberg
(author)
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Pallottini, AndreaScuola Normale Superiore di Pisa
(author)
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Tamura, Y.Nagoya University
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Watson, DarachNiels Bohr Institute
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National Astronomical Observatory of JapanNagoya University
(creator_code:org_t)
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In:Monthly Notices of the Royal Astronomical Society: Letters: Oxford University Press (OUP)508:1, s. L58-L631745-39251745-3933
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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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Hagimoto, Masato
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Tamura, Y.
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Watson, Darach
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Chalmers University of Technology