2024-03-29T13:26:01Z
https://nagoya.repo.nii.ac.jp/oai
oai:nagoya.repo.nii.ac.jp:02002169
2023-01-16T04:43:14Z
336:695:696
Accurate dust temperature determination in a z = 7.13 galaxy
Bakx, Tom J L C
Sommovigo, Laura
Carniani, Stefano
Ferrara, Andrea
Akins, Hollis B
Fujimoto, Seiji
Hagimoto, Masato
Knudsen, Kirsten K
Pallottini, Andrea
Tamura, Yoichi
Watson, Darach
open access
This article has been accepted for publication in [Monthly Notices of the Royal Astronomical Society: Letters] ©: [2021] [authors] Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.
dust
extinction
galaxies: evolution
galaxies: formation
galaxies: high-redshift
galaxies: individual: (A1689-zD1)
submillimetre: galaxies
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^+13−7) K, and Md=(1.7^+1.3−0.7,2.0^+1.8−1.0)×10^7M⊙. 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.
Oxford University Press
2022-03-09
2021-11
eng
journal article
VoR
http://hdl.handle.net/2237/0002002169
https://nagoya.repo.nii.ac.jp/records/2002169
https://doi.org/10.1093/mnrasl/slab104
1745-3925
Monthly Notices of the Royal Astronomical Society: Letters
508
1
L58
L63
https://nagoya.repo.nii.ac.jp/record/2002169/files/slab104.pdf
application/pdf
2 MB
2022-03-09