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- Fan, Lulu,1982 (author)
The SCUBA-2 850 mu m Follow-up of WISE-selected, Luminous Dust-obscured Quasars
- Article/chapterEnglish2017
Publisher, publication year, extent ...
- 2017-10-24
- IOP Publishing,2017
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- LIBRIS-ID:oai:research.chalmers.se:d2eff9b0-5159-4c27-bcde-e416f3162d62
- https://research.chalmers.se/publication/253147URI
- https://doi.org/10.1088/1538-3873/aa8e91DOI
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- Language:English
- Summary in:English
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- Hot dust-obscured galaxies (Hot DOGs) are a new population recently discovered in the Wide-field Infrared Survey Explorer All-Sky survey. Multiwavelength follow-up observations suggest that they are luminous, dust-obscured quasars at high redshift. Here we present the JCMT SCUBA-2 850 mu m follow-up observations of 10 Hot DOGs. Four out of ten Hot DOGs have been detected at >3 sigma level. Based on the IR SED decomposition approach, we derive the IR luminosities of AGN torus and cold dust components. Hot DOGs in our sample are extremely luminous with most of them having L-IR(tot) > 10(14) L-circle dot. The torus emissions dominate the total IR energy output. However, the cold dust contribution is still non-negligible, with the fraction of the cold dust contribution to the total IR luminosity (similar to 8%-24%) being dependent on the choice of torus model. The derived cold dust temperatures in Hot DOGs are comparable to those in UV bright quasars with similar IR luminosity, but much higher than those in SMGs. Higher dust temperatures in Hot DOGs may be due to the more intense radiation field caused by intense starburst and obscured AGN activities. Fourteen and five submillimeter serendipitous sources in the 10 SCUBA-2 fields around Hot DOGs have been detected at >3 sigma and >3.5 sigma levels, respectively. By estimating their cumulative number counts, we confirm the previous argument that Hot DOGs lie in dense environments. Our results support the scenario in which Hot DOGs are luminous, dust-obscured quasars lying in dense environments, and being in the transition phase between extreme starburst and UV-bright quasars.
Subject headings and genre
- NATURVETENSKAP Fysik Astronomi, astrofysik och kosmologi hsv//swe
- NATURAL SCIENCES Physical Sciences Astronomy, Astrophysics and Cosmology hsv//eng
- galaxies: active
- quasars: general
- infrared: galaxies
- galaxies: evolution
- submillimeter: galaxies
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- Jones, Suzy,1988Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)suzyj (author)
- Han, Y. K. (author)
- Knudsen, Kirsten Kraiberg,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kraiberg (author)
- Chalmers tekniska högskola (creator_code:org_t)
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- In:Publications of the Astronomical Society of the Pacific: IOP Publishing129:9820004-62801538-3873
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