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A direct calibratio...
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Koprowski, M. P.University of Hertfordshire
(author)
A direct calibration of thtae IRX-β relation in Lyman-break Galaxies at z = 3-5
- Article/chapterEnglish2018
Publisher, publication year, extent ...
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2018-06-12
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Oxford University Press (OUP),2018
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:research.chalmers.se:5bd49e8a-4066-4436-9d10-b9d9505e04cd
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https://doi.org/10.1093/mnras/sty1527DOI
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https://research.chalmers.se/publication/504596URI
Supplementary language notes
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Language:English
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Summary in:English
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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We use a sample of 4209 Lyman-break galaxies (LBGs) at z ≃ 3, 4, and 5 in the UKIRT Infrared Deep Sky Survey Ultra Deep Survey field to investigate the relationship between the observed slope of the stellar continuum emission in the ultraviolet, β, and the thermal dust emission, as quantified via the so-called 'infrared excess' (IRX=LIR/LUV). Through a stacking analysis, we directly measure the 850-μm flux density of LBGs in our deep (0.9 mJy) James Clerk Maxwell Telescope SCUBA-2 850-μm map as well as deep public Herschel/SPIRE 250-, 350-, and 500-μm imaging. We establish functional forms for the IRX-β relation to z ~ 5, confirming that there is no significant redshift evolution of the relation, and that the resulting average IRX-β curve is consistent with a Calzetti-like attenuation law. Comparing our results with recent works in the literature, we confirm that discrepancies in the slope of the IRX-β relation are driven by biases in the methodology used to determine the ultraviolet slopes. Consistent results are found when IRX-β is evaluated by stacking in bins of stellar mass, and we argue that the near-linear IRX-M* relationship is a better proxy for correcting observed ultraviolet luminosities to total star formation rates, provided an accurate handle on M* and also gives clues as to the physical driver of the role of dust-obscured star formation in high-redshift galaxies.
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Coppin, K. E. K.University of Hertfordshire
(author)
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Geach, J.E.University of Hertfordshire
(author)
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McLure, R. J.University of Edinburgh
(author)
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Almaini, O.University Of Nottingham
(author)
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Blain, A.University Of Leicester
(author)
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Bremer, M.University of Bristol
(author)
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Bourne, N.University of Edinburgh
(author)
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Chapman, S. C.Dalhousie University
(author)
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Conselice, C.University Of Nottingham
(author)
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Dunlop, J. S.University of Edinburgh
(author)
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Farrah, D.Virginia Polytechnic Institute and State University (Virginia Tech)
(author)
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Hartley, W. G.University College London (UCL)
(author)
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Karim, A.Universität Bonn,University of Bonn
(author)
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Knudsen, Kirsten Kraiberg,1976Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)kraiberg
(author)
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Michalowski, M. J.Uniwersytet im. Adama Mickiewicza w Poznaniu,Adam Mickiewicz University in Poznań
(author)
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Scott, D.University of British Columbia (UBC)
(author)
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Simpson, C.Gemini Observatory North
(author)
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Smith, D. J. B.University of Hertfordshire
(author)
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van der Werf, P.Universiteit Leiden (UL),Leiden University (UL)
(author)
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University of HertfordshireUniversity of Edinburgh
(creator_code:org_t)
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In:Monthly Notices of the Royal Astronomical Society: Oxford University Press (OUP)479:4, s. 4355-43660035-87111365-2966
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Koprowski, M. P.
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Coppin, K. E. K.
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Geach, J.E.
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McLure, R. J.
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Almaini, O.
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Blain, A.
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show more...
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Bremer, M.
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Bourne, N.
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Chapman, S. C.
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Conselice, C.
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Dunlop, J. S.
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Farrah, D.
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Hartley, W. G.
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Karim, A.
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Knudsen, Kirsten ...
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Michalowski, M. ...
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Scott, D.
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Simpson, C.
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Smith, D. J. B.
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van der Werf, P.
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