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dc.contributor.authorBanerji, Mandaen
dc.contributor.authorMcMahon, Richarden
dc.contributor.authorWillott, CJen
dc.contributor.authorGeach, JEen
dc.contributor.authorHarrison, CMen
dc.contributor.authorAlaghband-Zadeh, Sen
dc.contributor.authorAlexander, DMen
dc.contributor.authorBourne, Nen
dc.contributor.authorCoppin, KEKen
dc.contributor.authorDunlop, JSen
dc.contributor.authorFarrah, Den
dc.contributor.authorJarvis, Men
dc.contributor.authorMichałowski, MJen
dc.contributor.authorPage, Men
dc.contributor.authorSmith, DJBen
dc.contributor.authorSwinbank, AMen
dc.contributor.authorSymeonidis, Men
dc.contributor.authorVan, der Werf PPen
dc.date.accessioned2015-09-29T11:47:49Z
dc.date.available2015-09-29T11:47:49Z
dc.date.issued2015-09-22en
dc.identifier.citationMonthly Notices of the Royal Astronomical Society 2015, 454(1), 419-438. doi: 10.1093/mnras/stv1881en
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/251203
dc.description.abstractWe study the 850µm emission in X-ray selected active galactic nuclei (AGN) in the ∼2 deg² COSMOS field using new data from the SCUBA-2 Cosmology Legacy Survey. We find nineteen 850µm bright X-ray AGN in a “high-sensitivity” region covering 0.89 deg² with flux densities of S₈₅₀=4-10 mJy. The 19 AGN span the full range in redshift and hard Xray luminosity covered by the sample - 0.7 ~< z ~< 3.5 and 43.2 . log₁₀(LX) ~< 45. We report a highly significant stacked 850µm detection of a hard X-ray flux-limited population of 699 z > 1 X-ray AGN - S₈₅₀=0.71±0.08mJy. We explore trends in the stacked 850µm flux densities with redshift, finding no evolution in the average cold dust emission over the redshift range probed. For Type 1 AGN, there is no significant correlation between the stacked 850µm flux and hard X-ray luminosity. However, in Type 2 AGN the stacked submillimeter flux is a factor of 2 higher at high luminosities. When averaging over all X-ray luminosities, no significant differences are found in the stacked submillimeter fluxes of Type 1 and Type 2 AGN as well as AGN separated on the basis of X-ray hardness ratios and optical-to-infrared colours. However, at log10(L₂₋₁₀ / erg s⁻¹ > 44.4), dependences in average submillimeter flux on the optical-to-infrared colours become more pronounced. We argue that these high luminosity AGN represent a transition from a secular to a merger-driven evolutionary phase where the star formation rates and accretion luminosities are more tightly coupled. Stacked AGN 850µm fluxes are compared to the stacked fluxes of a mass-matched sample of Kband selected non-AGN galaxies. We find that at 10.5 <log10(M∗/M⊙)< 11.5, the non-AGN 850µm fluxes are 1.5 − 2× higher than in Type 2 AGN of equivalent mass. We suggest these differences are due to the presence of massive dusty, red starburst galaxies in the K-band selected non-AGN sample, which are not present in optically selected catalogues covering a smaller area.
dc.description.sponsorshipMB, RGM and KEKC acknowledge support from STFC. JEG thanks the Royal Society for a University Research Fellowship. NB and JSD acknowledge the support of the European Research Council via the award of an Advanced Grant, and the contribution of the EC FP7 SPACE project ASTRODEEP (Ref.No: 312725). DMA and CMH acknowledge support from STFC grant ST/I001573/1.
dc.languageEnglishen
dc.language.isoenen
dc.publisherOxford University Press
dc.subjectgalaxies:activeen
dc.subjectsubmillimetre:galaxiesen
dc.subjectX-rays:galaxiesen
dc.titleCold Dust Emission from X-ray AGN in the SCUBA-2 Cosmology Legacy Survey: Dependence on Luminosity, Obscuration & AGN Activityen
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from Oxford University Press via http://dx.doi.org/10.1093/mnras/stv1881en
prism.endingPage438
prism.publicationDate2015en
prism.publicationNameMonthly Notices of the Royal Astronomical Societyen
prism.startingPage419
prism.volume454en
dc.rioxxterms.funderSTFC
dc.rioxxterms.projectidST/I001573/1
rioxxterms.versionofrecord10.1093/mnras/stv1881en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-09-22en
dc.contributor.orcidBanerji, Manda [0000-0002-0639-5141]
dc.contributor.orcidMcMahon, Richard [0000-0001-8447-8869]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idSTFC (ST/K000985/1)


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