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dc.contributor.authorKoprowski, M. P.
dc.contributor.authorCoppin, K. E. K.
dc.contributor.authorGeach, J. E.
dc.contributor.authorHine, N. K.
dc.contributor.authorBremer, M.
dc.contributor.authorChapman, S. C.
dc.contributor.authorDavies, L. J. M.
dc.contributor.authorHayashino, T.
dc.contributor.authorKnudsen, K. K.
dc.contributor.authorKubo, M.
dc.contributor.authorLehmer, B. D.
dc.contributor.authorMatsuda, Y.
dc.contributor.authorSmith, D. J. B.
dc.contributor.authorWerf, P. P. van der
dc.contributor.authorViolino, G.
dc.contributor.authorYamada, T.
dc.date.accessioned2016-12-12T18:37:28Z
dc.date.available2016-12-12T18:37:28Z
dc.date.issued2016-09-10
dc.identifier.citationKoprowski , M P , Coppin , K E K , Geach , J E , Hine , N K , Bremer , M , Chapman , S C , Davies , L J M , Hayashino , T , Knudsen , K K , Kubo , M , Lehmer , B D , Matsuda , Y , Smith , D J B , Werf , P P V D , Violino , G & Yamada , T 2016 , ' A resolved map of the infrared excess in a Lyman Break Galaxy at z=3 ' , Astrophysical Journal Letters , vol. 828 , no. 2 . https://doi.org/10.3847/2041-8205/828/2/L21
dc.identifier.issn2041-8205
dc.identifier.otherPURE: 10402873
dc.identifier.otherPURE UUID: 2f6616a7-e177-4868-aacd-4bf54b11a2c3
dc.identifier.otherArXiv: http://arxiv.org/abs/1608.05080v1
dc.identifier.otherScopus: 84987790636
dc.identifier.otherORCID: /0000-0002-0729-2988/work/30423046
dc.identifier.otherORCID: /0000-0001-9708-253X/work/69424314
dc.identifier.urihttp://hdl.handle.net/2299/17411
dc.descriptionThe version of record, © 2016 The American Astronomical Society, M. P. Koprowski, K. E. K. Coppin, J. E. Geach, N. K. Hine, M. Bremer, S. Chapman, L. J. M. Davies, T. Hayashino, K. K. Knudsen, M. Kubo, B. D. Lehmer, Y. Matsuda, D. J. B. Smith, P. P. van der Werf, G. Violino, and T. Yamada, ‘A RESOLVED MAP OF THE INFRARED EXCESS IN A LYMAN BREAK GALAXY AT z = 3’, The Astrophysical Journal Letters, Vol 828(2), is available via doi: 10.3847/2041-8205/828/2/L21
dc.description.abstractWe have observed the dust continuum of ten z=3.1 Lyman Break Galaxies with the Atacama Large Millimeter/Submillimeter Array at ~450 mas resolution in Band 7. We detect and resolve the 870um emission in one of the targets with an integrated flux density of S(870)=(192+/-57) uJy, and measure a stacked 3-sigma signal of S(870)=(67+/-23) uJy for the remaining nine. The total infrared luminosities estimated from full spectral energy distribution fits are L(8-1000um)=(8.4+/-2.3)x10^10 Lsun for the detection and L(8-1000um)=(2.9+/-0.9)x10^10 Lsun for the stack. With HST ACS I-band imaging we map the rest-frame UV emission on the same scale as the dust, effectively resolving the 'infrared excess' (IRX=L_FIR/L_UV) in a normal galaxy at z=3. Integrated over the galaxy we measure IRX=0.56+/-0.15, and the galaxy-averaged UV slope is beta=-1.25+/-0.03. This puts the galaxy a factor of ~10 below the IRX-beta relation for local starburst nuclei of Meurer et al. (1999). However, IRX varies by more than a factor of 3 across the galaxy, and we conclude that the complex relative morphology of the dust relative to UV emission is largely responsible for the scatter in the IRX-beta relation at high-z. A naive application of a Meurer-like dust correction based on the UV slope would dramatically over-estimate the total star formation rate, and our results support growing evidence that when integrated over the galaxy, the typical conditions in high-z star-forming galaxies are not analogous to those in the local starburst nuclei used to establish the Meurer relation.en
dc.format.extent6
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Letters
dc.rightsOpen
dc.subjectastro-ph.GA
dc.subjectastro-ph.CO
dc.titleA resolved map of the infrared excess in a Lyman Break Galaxy at z=3en
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2016-09-10
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.3847/2041-8205/828/2/L21
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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