| DOI | Trouver le DOI : https://doi.org/10.3847/1538-4357/ab607f |
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| Auteur | Rechercher : Lim, Chen-FattIdentifiant ORCID : https://orcid.org/0000-0003-1213-9360; Rechercher : Wang, Wei-HaoIdentifiant ORCID : https://orcid.org/0000-0003-2588-1265; Rechercher : Smail, IanIdentifiant ORCID : https://orcid.org/0000-0003-3037-257X; Rechercher : Scott, DouglasIdentifiant ORCID : https://orcid.org/0000-0002-6878-9840; Rechercher : Chen, Chian-ChouIdentifiant ORCID : https://orcid.org/0000-0002-3805-0789; Rechercher : Chang, Yu-Yen; Rechercher : Simpson, James M.Identifiant ORCID : https://orcid.org/0000-0002-8521-1995; Rechercher : Toba, YoshikiIdentifiant ORCID : https://orcid.org/0000-0002-3531-7863; Rechercher : Shu, Xinwen; Rechercher : Clements, DaveIdentifiant ORCID : https://orcid.org/0000-0002-9548-5033; Rechercher : Greenslade, Josh; Rechercher : Ao, YipingIdentifiant ORCID : https://orcid.org/0000-0003-3139-2724; Rechercher : Babul, ArifIdentifiant ORCID : https://orcid.org/0000-0003-1746-9529; Rechercher : Birkin, JackIdentifiant ORCID : https://orcid.org/0000-0002-3272-7568; Rechercher : Chapman, Scott C.1; Rechercher : Cheng, Tai-An; Rechercher : Cho, Brian S.; Rechercher : Dannerbauer, HelmutIdentifiant ORCID : https://orcid.org/0000-0001-7147-3575; Rechercher : Dudzevičiūtė, UgnėIdentifiant ORCID : https://orcid.org/0000-0003-4748-0681; Rechercher : Dunlop, James; Rechercher : Gao, YuIdentifiant ORCID : https://orcid.org/0000-0003-0007-2197; Rechercher : Goto, Tomotsugu; Rechercher : Ho, Luis C.Identifiant ORCID : https://orcid.org/0000-0001-6947-5846; Rechercher : Hsu, Li-TingIdentifiant ORCID : https://orcid.org/0000-0002-3538-8987; Rechercher : Hwang, Ho SeongIdentifiant ORCID : https://orcid.org/0000-0003-3428-7612; Rechercher : Jeong, Woong-SeobIdentifiant ORCID : https://orcid.org/0000-0002-2770-808X; Rechercher : Koprowski, MaciejIdentifiant ORCID : https://orcid.org/0000-0001-5785-1154; Rechercher : Lee, Chien-HsiuIdentifiant ORCID : https://orcid.org/0000-0003-1700-5740; Rechercher : Lin, Ming-Yi; Rechercher : Lin, Wei-Ching; Rechercher : Michałowski, Michał J.Identifiant ORCID : https://orcid.org/0000-0001-9033-4140; Rechercher : Parsons, HarrietIdentifiant ORCID : https://orcid.org/0000-0002-6327-3423; Rechercher : Sawicki, Marcin; Rechercher : Shirley, Raphael; Rechercher : Shim, Hyunjin; Rechercher : Urquhart, Sheona; Rechercher : Wang, Jianfa; Rechercher : Wang, TaoIdentifiant ORCID : https://orcid.org/0000-0002-2504-2421 |
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| Affiliation | - Conseil national de recherches du Canada. Herzberg en astronomie et en astrophysique
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| Format | Texte, Article |
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| Sujet | high-redshift galaxies; galaxy evolution; luminosity function; submillimeter astronomy |
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| Résumé | We construct a SCUBA-2 450 μm map in the COSMOS field that covers an area of 300 arcmin2 and reaches a 1σ noise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 μm with signal-to-noise ratios >4.0 and analyze the physical properties of their multiwavelength counterparts. We find that most of the sources are at z ≲ 3, with a median of z=1.79⁺⁰.⁰³₋₁.₅%. About 35⁺³²₋₂₅% of our sources are classified as starburst galaxies based on their total star formation rates (SFRs) and stellar masses (M *). By fitting the far-infrared spectral energy distributions, we find that our 450 μm selected sample has a wide range of dust temperatures (20 K ≲ T d ≲ 60 K), with a median of Td=38.3⁺⁰.⁴₋₀.₉ K. We do not find a redshift evolution in dust temperature for sources with LIR > 10¹² >L⊙ at z < 3. However, we find a moderate correlation where the dust temperature increases with the deviation from the SFR–M * relation. The increase in dust temperature also correlates with optical morphology, which is consistent with merger-triggered starbursts in submillimeter galaxies. Our galaxies do not show the tight IRX–β UV correlation that has been observed in the local universe. We construct the infrared luminosity functions of our 450 μm sources and measure their comoving SFR densities (SFRDs). The contribution of the LIR > 10¹²L⊙ population to the SFRD rises dramatically from z = 0 to 2 (∝(1 + z)³.⁹±¹.¹) and dominates the total SFRD at z gsim 2. |
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| Date de publication | 2020-01-28 |
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| Maison d’édition | IOP |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | ddee847d-550d-4038-9211-34d8d280ae91 |
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| Enregistrement créé | 2020-11-05 |
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| Enregistrement modifié | 2021-09-17 |
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