Now showing items 1-20 of 2207

  • Periodic variations in the O-C diagrams of five pulsation frequencies of the DB white dwarf EC 20058-5234 

    Dalessio, J.; Sullivan, D. J.; Kilkenny, Dave; Provencal, J. L.; Shipman, H. L.; Sullivan, T.; Fraga, L.; Sefako, R. (American Physical Society, 2013)
    Variations in the pulsation arrival time of five independent pulsation frequencies of the DB white dwarf EC 20058−5234 individually imitate the effects of reflex motion induced by a planet or companion but are inconsistent ...
  • Probing reionization with LOFAR using 21-cm redshift space distortions 

    Jensen, Hannes; Datta, Kanan K.; Santos, Mario G.; Mellema, Garrelt; Chapman, Emma; Abdalla, Filipe B.; Iliev, Ilian T.; Mao, Yi; Shapiro, Paul R.; Zaroubi, Saleem; Bernardi, G.; Brentjens, M. A.; de Bruyn, A. G.; Ciardi, B.; Harker, G. J. A.; Jelić, V.; Kazemi, S.; Koopmans, L. V. E.; Labropoulos, P.; Martinez, O.; Offringa, A. R.; Pandey, V. N.; Schaye, J.; Thomas, R. M.; Veligatla, V.; Vedantham, H.; Yatawatta, S. (Oxford University Press, 2013)
    One of the most promising ways to study the epoch of reionization (EoR) is through radio observations of the redshifted 21-cm line emission from neutral hydrogen. These observations are complicated by the fact that the ...
  • Probing the bias of radio sources at high redshift 

    Passmoor, S.; Cress, C.; Faltenbacher, Andreas; Johnston, Russell; Smith, Mathew; Ratsimbazafy, Ando; Hoyle, B. (Oxford University Press, 2013)
    The relationship between the clustering of dark matter and that of luminous matter is often described using the bias parameter. Here, we provide a new method to probe the bias of intermediate-to-high-redshift radio ...
  • Homeless in Observatory, Cape Town through the lens of Max-Neef's Fundamental Human Needs taxonomy 

    Schenck, Rinnie; Roman, Nicolette V.; Erasmus, Charlene; Blaauw, Derick; Ryan, Jill (SUN, 2017)
    The suburb of Observatory, also affectionately known as ''Obs'', is one of the older suburbs of the City of Cape Town, home to multiple cultures, a student population from the University of Cape Town, a variety of churches, ...
  • Properties of Type Ia supernovae inside rich galaxy clusters 

    Xavier, Henrique S.; Gupta, Ravi R.; Smith, Mathew; Sako, Masao; D’Andrea, Chris B.; Frieman, Joshua A.; Galbany, Lluis; Garnavich, Peter M.; Marriner, John; Nichol, Robert C.; Olmstead, Matthew D.; Schneider, Donald P. (Oxford University Press, 2013)
    We used the Gaussian Mixture Brightest Cluster Galaxy catalogue and Sloan Digital Sky Survey-II supernovae data with redshifts measured by the Baryon Oscillation Spectroscopic Survey to identify 48 Type Ia supernovae ...
  • Revised SWIRE photometric redshifts 

    Rowan-Robinson, Michael; Gonzalez-Solares, Eduardo A.; Vaccari, Mattia; Marchetti, Lucia (Oxford University Press, 2013)
    We have revised the Spitzer Wide-Area Infrared Extragalactic survey (SWIRE) Photometric Redshift Catalogue to take account of new optical photometry in several of the SWIRE areas, and incorporating Two Micron All Sky ...
  • Sample variance, source clustering and their influence on the counts of faint radio sources 

    Heywood, Ian; Jarvis, Matt J.; Condon, James J. (Oxford University Press, 2013)
    The shape of the curves defined by the counts of radio sources per unit area as a function of their flux density was one of the earliest cosmological probes. Radio source counts continue to be an area of astrophysical ...
  • SN Ia host galaxy properties from Sloan Digital Sky Survey-II spectroscopy 

    Johansson, Jonas; Thomas, Daniel; Smith, Mathew; Pforr, Janine; Maraston, Claudia; Nichol, Robert C.; Lampeitl, Hubert; Beifiori, Alessandra; Gupta, Ravi R.; Schneider, Donald P. (Oxford University Press, 2013)
    We study the stellar populations of Type Ia supernova (SN Ia) host galaxies using Sloan Digital Sky Survey (SDSS)-II spectroscopy. The main focus is on the relationships of SN Ia properties with stellar velocity dispersion ...
  • Stacked reverberation mapping 

    Fine, Stephen; Shanks, T.; Green, P.; Kelly, B. C.; Croom, S. M.; Webster, R. L.; Berger, E.; Chornock, R.; Burgett, W. S.; Chambers, K. C.; Kaiser, N.; Price, P. A. (Oxford University Press, 2013)
    Over the past 20 years reverberation mapping has proved one of the most successful techniques for studying the local (<1 pc) environment of supermassive black holes that drive active galactic nuclei. Key successes of ...
  • Testing gravity using large-scale redshift-space distortions 

    Raccanelli, Alvise; Bertacca, Daniele; Pietrobon, Davide; Schmidt, Fabian; Samushia, Lado; Bartolo, Nicola; Doré, Olivier; Matarrese, Sabino; Percival, Will J. (Oxford University Press, 2013)
    We use luminous red galaxies from the Sloan Digital Sky Survey (SDSS) II to test the cosmological structure growth in two alternatives to the standard cold dark matter ( CDM)+general relativity (GR) cosmological model. ...
  • Shell-model studies of the astrophysical rp reaction 29P(p, y)30 S 

    Richter, W. A.; Brown, B. Alex (American Physical Society, 2013)
    We present results for levels in 30S (the mirror nucleus of 30Si) that are used for the 29P(p,γ ) rp reaction rate calculations. The resonance energies used in the reaction rate calculations are based on recent ...
  • SoTL Publications by UWC Authors, 2010-2017 

    UWC Library (Unpublished, 2017-07)
    The file presents results of an exercise to track UWC SoTL publications between 2010 and 2017. The document lists these in order of faculty and professional unit and outlines the method that was followed.
  • Smartphone owners need security advice. How can we ensure they get it? 

    Renaud, Karen; Blignaut, Renette; Venter, Isabella (CONF-IRM and AIS Electronic Library (AISeL), 2016)
    Computer users often behave insecurely, and do not take the precautions they ought to. One reads almost daily about people not protecting their devices, not making backups and falling for phishing messages. This impacts ...
  • Understanding stakeholder expectations in higher education 

    Bytheway, Andrew J.; Venter, Isabella; Whyte, Grafton (CONF-IRM, 2017)
    Higher education invests heavily in information technology and information systems, with variable outcomes. Organisations in other sectors, such as engineering, the defence industry, public administration and business, ...
  • Testing homegeneity with Galaxy Star formation histories 

    Hoyle, Ben; Jimenez, Raul; Maartens, Roy; Heavens, Alan; Clarkson, Chris; Tojeiro, Rita (IOP Publishing, 2013)
    Observationally confirming spatial homogeneity on sufficiently large cosmological scales is of importance to test one of the underpinning assumptions of cosmology, and is also imperative for correctly interpreting dark ...
  • The complex physics of dusty star-forming galaxies at high redshifts as revealed by Herschel and Spitzer 

    Lo Faro, B.; Franceschini, A.; Vaccari, M.; Silva, L.; Rodighiero, G.; Berta, S.; Bock, J.; Burgarella, D.; Buat, V.; Cava, A.; Clements, D. L.; Cooray, A.; Farrah, D.; Feltre, A.; Gonzalez-Solares, E. A.; Hurley, P.; Lutz, D.; Magdis, G.; Magnelli, B.; Marchetti, L.; Oliver, S. J.; Page, M. J.; Popesso, P.; Pozzi, F.; Rigopoulou, D.; Rowan-Robinson, M.; Roseboom, I. G.; Scott, Douglas; Smith, A. J.; Symeonidis, M.; Wang, L.; Wuyts, S. (IOP Publishing, 2013)
    We combine far-infrared photometry from Herschel (PEP/HerMES) with deep mid-infrared spectroscopy from Spitzer to investigate the nature and the mass assembly history of a sample of 31 luminous and ultraluminous infrared ...
  • The COS-Halos survey: Rationale, design and a census of circumgalactic neutral hydrogen 

    Tumlinson, Jason; Thom, Christopher; Dave, Romeel; Werk, Jessica K.; Prochaska, J. Xavier; Tripp, Todd M.; Katz, Neal; Oppenheimer, Benjamin D.; Meiring, Joseph D.; Ford, Amanda Brady; O'Meara, John M.; Peeples, Molly S.; Sembach, Kenneth R.; Weinberg, David H. (IOP Publishing, 2013)
    We present the design and methods of the COS-Halos survey, a systematic investigation of the gaseous halos of 44 z = 0.15–0.35 galaxies using background QSOs observed with the Cosmic Origins Spectrograph aboard the Hubble ...
  • Developing competencies among health professions students related to the care of people with disabilities: a pilot study 

    Castro, Shamyr Sulyvan; Rowe, Michael; Andrade, Luana Foroni; Cyrino, Eliana Goldfarb (2017)
    This is a two-phase study, the first was a literature review that aimed to identify a set of competencies for professional practice that would be relevant for the health care of People with disabilities (PwD). These ...
  • The cosmic evolution of the IMF under the Jeans conjecture with implications for massive galaxies 

    Narayanan, Desika; Dave, Romeel (Oxford University Press, 2013)
    We examine the cosmic evolution of a stellar initial mass function (IMF) in galaxies that varies with the Jeans mass in the interstellar medium, paying particular attention to the K-band stellar mass-to-light ratio (M/LK) ...
  • The Edinburgh-Cape Blue Object Survey - III. Zone 2; galactic latitudes -30? > b > -40? 

    Kilkenny, Dave; Koen, C.; Hambly, N.; MacGillivray, H.; Stobie, R. S.; O’Donoghue, D. (Oxford University Press, 2013)
    The Edinburgh–Cape Blue Object Survey seeks to identify point sources with an ultraviolet excess. Results for zone 2 of the survey are presented here, covering that part of the South Galactic Cap between 30◦ and 40◦ from ...