Physics & Atmospheric Science: Recent submissions

Now showing items 21-40 of 532

  • B1933+503, a dusty radio quasar at z>2: implications for blank field sub-mm surveys? 

    Chapman, Scott C.; Scott, Douglas; Lewis, Geraint F.; Borys, Colin; Fahlman, Gregory G. (1998-10-27)
    We present a detailed mm-wave and optical study of the gravitational lens system B1933+503, discovered by Sykes et al.(1998) in the radio. This object is probably the most complex lens system known, with 10 lensed components ...

  • 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 ...

  • 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 ...

  • A Keck/DEIMOS Kinematic Study of Andromeda IX: dark matter on the smallest galactic scales 

    Chapman, Scott C.; Ibata, Rodrigo; Lewis, Geraint F.; Ferguson, Annette M. N.; Irwin, Mike; McConnachie, Alan; Tanvir, Nial (2005-10-20)
    We present the results of a kinematic survey of the dwarf spheroidal satellite of M31, And-IX, which appears to be the lowest surface brightness and also the faintest galaxy (M_V = -8.3) found to date. Using Keck/DEIMOS ...

  • Strangers in the night: Discovery of a dwarf spheroidal galaxy on its first Local Group infall 

    Chapman, S. C.; Penarrubia, J.; Ibata, R.; McConnachie, A.; Martin, N.; Irwin, M.; Blain, A.; Lewis, G. F.; Letarte, B.; Lo, K.; Ludlow, A.; O'neil, K. (2007-06-20)
    We present spectroscopic observations of the AndXII dwarf spheroidal galaxy using DEIMOS/Keck-II, showing it to be moving rapidly through the Local Group (-556 km/s heliocentric velocity, -281 km/s relative to Andromeda ...

  • A population of hot, dusty ultra-luminous galaxies at z~2 

    Chapman, S. C.; Smail, Ian; Blain, A. W.; Ivison, R. J. (2004-10-20)
    We report spectroscopic redshifts for 18 microJy-radio galaxies at mean redshift of z=2.2 that are faint at both submmillimeter (submm) and optical wavelengths. While the radio fluxes of these galaxies could indicate ...

  • Dynamics in the satellite system of Triangulum: Is AndXXII a dwarf satellite of M33? 

    Chapman, S. C.; Widrow, L.; Collins, M. L. M.; Dubinski, J.; Ibata, R. A.; Penarrubia, J.; Rich, M.; Ferguson, A. M. N.; Irwin, M. J.; Lewis, G. F.; Martin, N.; McConnachie, A.; Tanvir, N. (2012-06-25)
    We present results from a spectroscopic survey of the dwarf spheroidal And XXII and the two extended clusters EC1 and EC2. These three objects are candidate satellites of the Triangulum galaxy, M33, which itself is likely ...

  • Weighing the Black Holes in z~2 Submillimeter-Emitting Galaxies Hosting Active Galactic Nuclei 

    Alexander, D. M.; Brandt, W. N.; Smail, I.; Swinbank, A. M.; Bauer, F. E.; Blain, A. W.; Chapman, S. C.; Coppin, K. E. K.; Ivison, R. J.; Menendez-Delmestre, K. (2008-05-01)
    We place direct observational constraints on the black-hole masses of the cosmologically important z~2 submillimeter-emitting galaxy (SMG; f850>4mJy) population, and use measured host-galaxy masses to explore their ...

  • Evidence for extended, obscured starbursts in submm galaxies 

    Chapman, S. C.; Smail, Ian; Windhorst, R.; Muxlow, T.; Ivison, R. J. (2004-08-20)
    We compare high-resolution optical and radio imaging of 12 luminous submm galaxies at z=2.2+/-0.2 observed with HST and the MERLIN and VLA at comparable spatial resolution, 0.3" (2kpc). The radio emission traces the likely ...

  • Westphal-MMD11: An interacting, submillimeter luminous Lyman break galaxy 

    Chapman, S. C.; Shapley, A.; Steidel, C.; Windhorst, R. (2002-6-10)
    We present new Hubble Space Telescope, high-resolution optical imaging of the submm luminous Lyman-break galaxy, Westphal-MMD11, an interacting starburst at z=2.979. The new imaging data, in conjunction with re-analysis ...

  • The effect of lensing on the identification of bright SCUBA galaxies 

    Chapman, S. C.; Smail, Ian; Ivison, R. J.; Blain, A. W. (2002-09)
    Spectroscopic surveys of luminous submillimetre-selected sources have uncovered optically-bright galaxies at z<1 close to the positions of several submillimetre (submm) sources. Naive statistical analyses suggest that ...

  • Interferometric CO Observations of submillimeter-faint, radio-selected starburst galaxies at z~2 

    Chapman, S. C.; Neri, R.; Bertoldi, F.; Smail, Ian; Greve, T. R.; Trethewey, D.; Blain, A. W.; Cox, P.; Genzel, R.; Ivison, R. J.; Kovacs, A.; Swinbank, A. Omont A. M. (2008-12-20)
    High-redshift, dust-obscured galaxies -- selected to be luminous in the radio but relatively faint at 850um -- appear to represent a different population from the ultra-luminous submillimeter- (submm-) bright population. ...

  • Herschel-SPIRE, Far-Infrared Properties of Millimetre-Bright and -Faint Radio Galaxies 

    Chapman, S. C.; Ivison, R. J.; Roseboom, I. G.; Auld, R.; Bock, J.; Brisbin, D.; Burgarella, D.; Chanial, P.; Clements, D. L.; Cooray, A.; Eales, S.; Franceschini, A.; Giovannoli, E.; Glenn, J.; Griffin, M.; Mortier, A. M. J.; Oliver, S. J.; Omont, A.; Page, M. J.; Papageorgiou, A.; Pearson, C. P.; Pérez-Fournon, I.; Pohlen, M.; Rawlings, J. I.; Raymond, G.; Rodighiero, G.; Rowan-Robinson, M.; Scott, Douglas; Seymour, N.; Smith, A. J.; Symeonidis, M.; Tugwell, K. E.; Vaccari, M.; Vieira, J. D.; Vigroux, L.; Wang, L.; Wright, G. (2010-09-15)
    (abridged) We present the first study of the farIR properties of high redshift, radio-selected ULIRGs using deep observations obtained with SPIRE from the Herschel Multi-tiered Extragalactic Survey (HerMES). These galaxies ...

  • Further multiwavelength observations of the SSA22 Ly_alpha emitting `blob' 

    Chapman, S. C.; Scott, D.; Windhorst, R. A.; Frayer, D. T.; Borys, C.; Lewis, G. F.; Ivison, R. J. (2004-05)
    We present new follow-up observations of the sub-mm luminous Ly_alpha-emitting object in the SSA22 z=3.09 galaxy overdensity, referred to as `Blob 1' by Steidel et al.(2000). In particular we discuss high resolution Hubble ...

  • Hubble Space Telescope images of submillimeter sources: large, irregular galaxies at high redshift 

    Chapman, S. C.; Windhorst, R.; Odewahn, S.; Yan, H.; Conselice, C. (2003-12)
    We present new Hubble Space Telescope STIS, high-resolution optical imaging of a sample of 13 submillimeter (submm) luminous galaxies, for which the optical emission has been pinpointed either through radio-1.4 GHz or ...

  • A kinematically selected, metal-poor stellar halo in the outskirts of M31 

    Chapman, S. C.; Ibata, R.; Lewis, G. F.; Ferguson, A. M. N.; Irwin, M.; McConnachie, A.; Tanvir, N. (2006-12-10)
    We present evidence for a metal-poor, [Fe/H]$\sim-1.4$ $\sigma$=0.2 dex, stellar halo component detectable at radii from 10 kpc to 70 kpc, in our nearest giant spiral neighbor, the Andromeda galaxy. This metal-poor sample ...

  • The kinematic footprints of five stellar streams in Andromeda's halo 

    Chapman, S. C.; Ibata, R.; Irwin, M.; Koch, A.; Letarte, B.; Martin, N.; Collins, M.; Lewis, G. F.; McConnachie, A.; Penarrubia, J.; Rich, R. M.; Trethewey, D.; Ferguson, A. M. N.; Huxor, A.; Tanvir, N. (2008-10)
    (abridged) We present a spectroscopic analysis of five stellar streams (`A', `B', `Cr', `Cp' and `D') as well as the extended star cluster, EC4, which lies within streamC, all discovered in the halo of M31 from our ...

  • The nature of the bright submillimeter galaxy population: a radio pre-selected sample with I>25 

    Chapman, S. C.; Richards, E.; Lewis, G.; Wilson, G.; Barger, A. (2001-2-20)
    Deep submillimetre surveys have successfully detected distant, star-forming galaxies, enshrouded in vast quantities of dust and which emit most of their energy at far infrared wavelengths. These luminous galaxies are an ...

  • Optically faint counterparts to the ISO-FIRBACK 170 micron population: the discovery of cold, luminous galaxies at high redshift 

    Chapman, S. C.; Smail, I.; Ivison, R. J.; Helou, G.; Dale, D. A.; Lagache, G. (2002-07)
    We present Keck spectroscopy and UKIRT near-IR imaging observations of two 170micron-selected sources from the ISO-FIRBACK survey which have faint counterparts in the optical, and r-K~5. Both sources were expected to lie ...

  • Radio galaxy selected clusters at high redshift and associated ERO overdensities 

    Chapman, S. C.; McCarthy, P.; Persson, S. E. (2000-10)
    Galaxy clusters at high redshift present a superb opportunity to study galaxy evolution, with large galaxy samples at fixed distances. Several lines of evidence point towards large formation redshifts and passive evolution ...