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Douglas Scott
University of British Columbia
920Publications
102H-index
75.8kCitations
Publications 942
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The Origins Space Telescope (Origins) traces our cosmic history, from the formation of the first galaxies and the rise of metals to the development of habitable worlds and present-day life. Origins does this through exquisite sensitivity to infrared radiation from ions, atoms, molecules, dust, water vapor and ice, and observations of extra-solar planetary atmospheres, protoplanetary disks, and large-area extragalactic fields. Origins operates in the wavelength range 2.8 to 588 microns and is 100...
1 Citations
We construct a SCUBA-2 450-\mu map in the COSMOS field that covers an area of 300 arcmin^{2}and reaches a 1\sigmanoise level of 0.65 mJy in the deepest region. We extract 256 sources detected at 450 \mu with signal-to-noise ratio >4.0 and analyze the physical properties of their multi-wavelength counterparts. We find that most of the sources are at z\lesssim3 with a median of z = 1.79^{+0.03}_{-0.15} About 35^{+32}_{-25} of our sources are classified as starburst galaxies...
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The cosmic infrared background (CIB) provides a fundamental observational constraint on the star-formation history of galaxies over cosmic history. We estimate the contribution to the CIB from catalogued galaxies in the COSMOS field by using a novel map fitting technique on the \textit{Herschel} SPIRE maps. Prior galaxy positions are obtained using detections over a large range in wavelengths in the K_{\rm s}-3\,GHz range. Our method simultaneously fits the galaxies, the system foreground, an...
#1Yashar AkramiH-Index: 28
#2L. PolastriH-Index: 13
Last.F. BoulangerH-Index: 47
view all 190 authors...
The European Space Agency's Planck satellite, which was dedicated to studying the early Universe and its subsequent evolution, was launched on 14 May 2009. It scanned the microwave and submillimetre sky continuously between 12 August 2009 and 23 October 2013, producing deep, high-resolution, all-sky maps in nine frequency bands from 30 to 857GHz. This paper presents the cosmological legacy of Planck, which currently provides our strongest constraints on the parameters of the standard cosmologica...
10 CitationsSource
#1U. DudzevičiūtėH-Index: 1
#2Ian SmailH-Index: 101
Last.Paul van der WerfH-Index: 74
view all 30 authors...
We analyse the physical properties of a large, homogeneously selected sample of ALMA-located sub-mm galaxies (SMGs) detected in the SCUBA-2 CLS 850-\mu map of the UKIDSS/UDS field. This survey, AS2UDS, identified 707 SMGs across the ~1 sq.deg. field, including ~17 per cent which are undetected in the optical/near-infrared to K~25.7 mag. We interpret the UV-to-radio data using a physically motivated model, MAGPHYS and determine a median photometric redshift of z=2.61+-0.08, with a 68th perc...
1 Citations
#1B. Gullberg (Durham University)H-Index: 12
#2Ian Smail (Durham University)H-Index: 101
Last.Axel Weiss (MPG: Max Planck Society)H-Index: 50
view all 18 authors...
We present an analysis of the morphology and profiles of the dust continuum emission in 153 bright sub-millimetre galaxies (SMGs) detected with ALMA at signal to noise ratios of >8 in high-resolution 0′′.18 (∼1 kpc) 870 μm maps. We measure sizes, shapes and light profiles for the rest-frame far-infrared emission from these luminous star-forming systems and derive a median effective radius (Re) of 0′′.10 ± 0′′.04 for our sample with a median flux of S870=5.6 ± 0.2 mJy. We find that the apparent a...
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Canada has thriving communities in CMB (cosmic microwave background) studies, cosmology and submillimetre (submm) astronomy, with involvement in many facilities that featured prominently in previous Astronomy Long Range Plans. The standard cosmological model continues to be well fit using a small number of parameters. No one expects this model to be complete and so we need to continue to challenge it with data; moreover, it does not explain how galaxies and other structures form. So, how do we i...
#1Christine D. Wilson (McMaster University)H-Index: 62
#2Sydey Chapm (Dal: Dalhousie University)H-Index: 81
Last.Nienke van der MarelH-Index: 8
view all 14 authors...
(abridged) The Atacama Large Millimeter/submillimeter Array (ALMA) was the top-ranked priority for a new ground-based facility in the 2000 Canadian Long Range Plan. Ten years later, at the time of LRP2010, ALMA construction was well underway, with first science observations anticipated for 2011. In the past 8 years, ALMA has proved itself to be a high-impact, high-demand observatory, with record numbers of proposals submitted to the annual calls and large numbers of highly cited scientific paper...
#1B. Gullberg (Durham University)H-Index: 12
#2Ian Smail (Durham University)H-Index: 101
Last.Arthur WeissH-Index: 108
view all 17 authors...
We present an analysis of the morphology and profiles of the dust continuum emission in 153 bright sub-millimetre galaxies (SMGs) detected with ALMA at S/N ratios of >8in high-resolution 0.18''(\sim1pc) 870\mu maps. We measure sizes, shapes and light profiles for the rest-frame far-infrared emission from these luminous star-forming systems and derive a median effective radius (R_e of 0.10''\pm0.04''for our sample with a median flux of S_{870}=5.6\pm0.2Jy. We find that the ap...
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