Show simple item record

dc.contributor.authorRamasawmy, Joanna
dc.contributor.authorStevens, Jason
dc.contributor.authorMartin, Garreth
dc.contributor.authorGeach, James E.
dc.date.accessioned2019-05-23T14:05:14Z
dc.date.available2019-05-23T14:05:14Z
dc.date.issued2019-04-17
dc.identifier.citationRamasawmy , J , Stevens , J , Martin , G & Geach , J E 2019 , ' A flat trend of star-formation rate with X-ray luminosity of galaxies hosting AGN in the SCUBA-2 Cosmology Legacy Survey ' , Monthly Notices of the Royal Astronomical Society , vol. 486 , pp. 4320-4333 . https://doi.org/10.1093/mnras/stz1093
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 16663910
dc.identifier.otherPURE UUID: f8c83292-1a06-4d5c-934f-21461764791f
dc.identifier.otherArXiv: http://arxiv.org/abs/1904.07880v1
dc.identifier.urihttp://hdl.handle.net/2299/21348
dc.description© 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society.
dc.description.abstractFeedback processes from active galactic nuclei (AGN) are thought to play a crucial role in regulating star formation in massive galaxies. Previous studies using \textit{Herschel} have resulted in conflicting conclusions as to whether star formation is quenched, enhanced, or not affected by AGN feedback. We use new deep 850 $\mu$m observations from the SCUBA-2 Cosmology Legacy survey (S2CLS) to investigate star formation in a sample of X-ray selected AGN, probing galaxies up to $L_{0.5-7~\rm keV} = 10^{46}$ erg s$^{-1}$. Here we present the results of our analysis on a sample of 1957 galaxies at $ 1 <z <3 $, using both S2CLS and ancilliary data at seven additional wavelengths (24--500 \mcm) from \textit{Herschel} and \textit{Spitzer}. We perform a stacking analysis, binning our sample by redshift and X-ray luminosity. By fitting analytical spectral energy distributions (SEDs) to decompose contributions from cold and warm dust, we estimate star-formation rates for each `average' source. We find that the average AGN in our sample resides in a star-forming host galaxy, with SFRs ranging from 80 - 600 $M_{\odot}$ year$^{-1}$. Within each redshift bin, we see no trend of SFR with X-ray luminosity, instead finding a flat distribution of SFR across $\sim$3 orders of magnitude of AGN luminosity. By studying instantaneous X-ray luminosities and SFRs, we find no evidence that AGN activity affects star formation in host galaxies.en
dc.format.extent14
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Society
dc.rightsOpen
dc.subjectastro-ph.GA
dc.titleA flat trend of star-formation rate with X-ray luminosity of galaxies hosting AGN in the SCUBA-2 Cosmology Legacy Surveyen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionCentre of Data Innovation Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2019-04-17
rioxxterms.versionAM
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.1093/mnras/stz1093
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record