Browsing Physics & Atmospheric Science by Author "Chapman, Scott C."

Now showing items 21-38 of 38

  • Modeling the evolution of infrared luminous galaxies: the influence of the Luminosity-Temperature distribution 

    Lewis, Geraint F.; Chapman, Scott C.; Helou, George (2005-03)
    The evolution of the luminous infrared galaxy population is explored using a pure luminosity evolution model which incorporates the locally observed luminosity-temperature distribution for IRAS galaxies. Pure luminosity ...

  • Near-IR adaptive optics imaging of nuclear spiral structure in the Seyfert galaxy, NGC3227 

    Chapman, Scott C.; Morris, Simon L.; Walker, Gordon A. H. (2002-04-04)
    We present high spatial resolution, near-IR images in J, H, K of the nucleus of NGC3227, obtained with the Adaptive Optics bonnette on CFHT. The ~0.15 arcsec (17pc) resolution allows structures to be probed in the core ...

  • PAndAS in the mist: The stellar and gaseous mass within the halos of M31 and M33 

    Lewis, Geraint F.; Braun, Robert; McConnachie, Alan W.; Irwin, Michael J.; Ibata, Rodrigo A.; Chapman, Scott C.; Ferguson, Annette M. N.; Martin, Nicolas F.; Fardal, Mark; Dubinski, John; Widrow, Larry; Mackey, A. Dougal; Babul, Arif; Tanvir, Nial; Rich, Michael (2012-11-16)
    Large scale surveys of the prominent members of the Local Group have provided compelling evidence for the hierarchical formation of massive galaxies, revealing a wealth of substructure that is thought to be the debris from ...

  • Restframe Optical Spectroscopic Classifications for Submillimeter Galaxies 

    Takata, Tadafumi; Sekiguchi, Kazuhiro; Smail, Ian; Chapman, Scott C.; Geach, J. E.; Swinbank, A. M.; Blain, Andrew; Ivison, R. J. (2006-11-10)
    We report the results of a systematic near-infrared spectroscopic survey using the Subaru, VLT and Keck Telescopes of a sample of high redshift Ultra-luminous Infrared Galaxies (ULIRGs) mainly composed of submillimeter-selected ...

  • SCUBA observations of Hawaii 167 

    Lewis, Geraint F.; Chapman, Scott C. (2000-11)
    We present the first submillimetre observations of the z=2.36 broad absorption line system Hawaii 167. Our observations confirm the hypothesis that Hawaii 167 contains a massive quantity of dust, the optical depth of which ...

  • A search for the submillimetre counterparts to Lyman break galaxies 

    Chapman, Scott C.; Scott, Douglas; Steidel, Charles C.; Borys, Colin; Halpern, Mark; Morris, Simon L.; Adelberger, Kurt L.; Dickinson, Mark; Giavalisco, Mauro; Pettini, Max (2002-04-04)
    We have carried out targetted sub-mm observations as part of a programme to explore the connection between the rest-frame UV and far-IR properties of star-forming galaxies at high redshift, which is currently poorly ...

  • The Star Formation History and Dust Content in the Far Outer Disc of M31 

    Bernard, Edouard J.; Ferguson, Annette M. N.; Barker, Michael K.; Hidalgo, Sebastian L.; Ibata, Rodrigo A.; Irwin, Michael J.; Lewis, Geraint F.; McConnachie, Alan W.; Monelli, Matteo; Chapman, Scott C. (2011-11-22)
    We present a detailed analysis of two fields located 26 kpc (~5 scalelengths) from the centre of M31. One field samples the major axis populations--the Outer Disc field--while the other is offset by ~18' and samples the ...

  • The stellar halo and outer disk of M33 

    McConnachie, Alan W.; Chapman, Scott C.; Ibata, Rodrigo A.; Ferguson, Annette M. N.; Irwin, Mike J.; Lewis, Geraint F.; Tanvir, Nial R. (2006-08-10)
    We present first results from a Keck/DEIMOS spectroscopic survey of red giant branch (RGB) stars in M33. The radial velocity distributions of the stars in our fields are well described by three Gaussian components, ...

  • Submillimeter Observations of the Ultraluminous BAL Quasar APM 08279+5255 

    Lewis, Geraint F.; Chapman, Scott C.; Ibata, Rodrigo A.; Irwin, Michael J.; Totten, Edward J. (1998-9-20)
    With an inferred bolometric luminosity of $5\times10^{15}{\rm \lsun}$, the recently identified z=3.87, broad absorption line quasar APM 08279+5255 is apparently the most luminous object currently known. As half of its ...

  • Submillimetre and far-infrared spectral energy distributions of galaxies: the luminosity-temperature relation and consequences for photometric redshifts 

    Blain, Andrew W.; Barnard, V. E.; Chapman, Scott C. (2003-01)
    The spectral energy distributions (SEDs) of dusty high-redshift galaxies are poorly sampled in frequency and spatially unresolved. Their form is crucially important for estimating the large luminosities of these galaxies ...

  • Submillimetre Detection of the z=2.83 Lyman-Break Galaxy, Westphal-MM8, and Implications for SCUBA2 

    Chapman, Scott C.; Casey, Caitlin M. (2009-03-12)
    We present confusion limited submillimetre (submm) observations with the SCUBA camera on the JCMT of the z=2.83 Lyman-break galaxy (LBG), Westphal-MM8, reaching an 850um sensitivity even greater than that achieved in the ...

  • Submillimetre observations of a sample of broad absorption line quasars 

    Lewis, Geraint F.; Chapman, Scott C.; Kuncic, Zdenka (2003-10-10)
    The broad absorption line (BAL) features seen in a small fraction of quasar optical/UV spectra are attributed to bulk outflows away from the quasar core. Observational evidence suggests that dust plays a key role in these ...

  • Submillimetre sources in rich cluster fields - source counts, redshift estimates, and cooling flow limits 

    Chapman, Scott C.; Scott, Douglas; Borys, Colin; Fahlman, Gregory G. (2002-02-11)
    Recent submillimetre surveys have revealed a population of dusty, high redshift sources of great cosmological significance for understanding dust-enshrouded star formation in distant galaxies, and for determining the origin ...

  • The Three-Dimensional Structure of the M31 Satellite System; Strong Evidence for an Inhomogeneous Distribution of Satellites 

    Conn, Anthony R.; Lewis, Geraint F.; Ibata, Rodrigo A.; Parker, Quentin A.; Zucker, Daniel B.; McConnachie, Alan W.; Martin, Nicolas F.; Valls-Gabaud, David; Tanvir, Nial; Irwin, Michael J.; Ferguson, Annette M. N.; Chapman, Scott C. (2013-01-29)
    We undertake an investigation into the spatial structure of the M31 satellite system utilizing the distance distributions presented in a previous publication. These distances make use of the unique combination of depth and ...

  • Understanding the nature of the optically faint radio sources and their connection to the submillimeter population 

    Chapman, Scott C.; Lewis, Geraint F.; Scott, Douglas; Borys, Colin; Richards, Eric A. (2002-05-10)
    We present a sample of 43 submillimeter sources detected (at >3 sigma), drawn from our program to follow-up optically faint radio sources with SCUBA. These sources already have associated radio and in many cases optical ...

  • Unearthing Foundations of a Cosmic Cathedral: Searching the Stars for M33's Halo 

    Cockcroft, Robert; McConnachie, Alan W.; Harris, William E.; Ibata, Rodrigo; Irwin, Mike J.; Ferguson, Annette M. N.; Fardal, Mark A.; Babul, Arif; Chapman, Scott C.; Lewis, Geraint F.; Martin, Nicolas F.; Puzia, Thomas H. (2012-10-29)
    We use data from the Pan-Andromeda Archaeological Survey (PAndAS) to search for evidence of an extended halo component belonging to M33 (the Triangulum Galaxy). We identify a population of red giant branch (RGB) stars at ...

  • An upper limit to [C II] emission in a z ~= 5 galaxy 

    Marsden, Gaelen; Borys, Colin; Chapman, Scott C.; Halpern, Mark; Scott, Douglas (2005-05-01)
    Low-ionization-state far-infrared (FIR) emission lines may be useful diagnostics of star-formation activity in young galaxies, and at high redshift may be detectable from the ground. In practice, however, very little is ...

  • Using SCUBA to place upper limits on arcsecond scale CMB anisotropies at 850 microns 

    Borys, Colin; Chapman, Scott C.; Scott, Douglas (1999-09-19)
    The SCUBA instrument on the James Clerk Maxwell Telescope has already had an impact on cosmology by detecting relatively large numbers of dusty galaxies at high redshift. Apart from identifying well-detected sources, such ...