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Douglas Scott
University of British Columbia
742Publications
98H-index
66.1kCitations
Publications 742
Newest
#1Y. AkramiH-Index: 8
#2L. PolastriH-Index: 12
Last.F. ForastieriH-Index: 10
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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...
#1U. DudzevičiūtėH-Index: 1
#2Ian SmailH-Index: 99
Last.A. W. BlainH-Index: 75
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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...
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: 38
#2Sydey Chapm (Dal: Dalhousie University)H-Index: 84
Last.Erik Rosolowsky (U of A: University of Alberta)H-Index: 42
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(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...
#1J. MaH-Index: 11
#2Asantha CoorayH-Index: 59
Last.David L. ClementsH-Index: 5
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The largest Herschel extragalactic surveys, H-ATLAS and HerMES, have selected a sample of "ultrared" dusty, star-forming galaxies (DSFGs) with rising SPIRE flux densities (S_{500} > S_{350} > S_{250} so-called "500 \mu-risers") as an efficient way for identifying DSFGs at higher redshift (z > 4. In this paper, we present a large Spitzer follow-up program of 300 Herschel ultrared DSFGs. We have obtained high-resolution ALMA, NOEMA, and SMA data for 63 of them, which allow us to securely ...
#1B. Gullberg (Durham University)H-Index: 10
#2Ian Smail (Durham University)H-Index: 99
Last.D. Farrah (UH: University of Hawaii)H-Index: 62
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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...
We investigate recent claims for a detection of "Hawking points" (positions on the sky with unusually large temperature gradients between rings) in the cosmic microwave background (CMB) temperature maps at the 99.98% confidence level. We find that, after marginalization over the size of the rings, an excess is detected in Planck satellite maps at only an 87% confidence level (i.e., little more than 1\sigma. Therefore, we conclude that there is no statistically significant evidence for the pre...
#1David T. LeisawitzH-Index: 20
#2Edward AmatucciH-Index: 3
view all 104 authors...
This paper discusses the science case for a sensitive spectro-polarimetric survey of the microwave sky. Such a survey would provide a tomographic and dynamic census of the three-dimensional distribution of hot gas, velocity flows, early metals, dust, and mass distribution in the entire Hubble volume, exploit CMB temperature and polarisation anisotropies down to fundamental limits, and track energy injection and absorption into the radiation background across cosmic times by measuring spectral di...
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