Chapman, Scott: Recent submissions

Now showing items 121-140 of 211

  • Evidence for an accretion origin for the outer halo globular cluster system of M31 

    Mackey, Dougal, Avon Huxor, Annette Ferguson, Mike Irwin, et al. 2010. "Evidence for an accretion origin for the outer halo globular cluster system of M31." The Astrophysical Journal Letters 717(1): L11.
    We use a sample of newly-discovered globular clusters from the Pan-Andromeda Archaeological Survey (PAndAS) in combination with previously-catalogued objects to map the spatial distribution of globular clusters in the M31 ...

  • Deep Gemini/GMOS imaging of an extremely isolated globular cluster in the Local Group 

    Mackey, A. D., A. M. N. Ferguson, M. J. Irwin, N. F. Martin, et al. 2009. "Deep Gemini/GMOS imaging of an extremely isolated globular cluster in the Local Group." Monthly Notices of the Royal Astronomical Society 401:533.
    We report on deep imaging of a remote M31 globular cluster, MGC1, obtained with Gemini/GMOS. Our colour-magnitude diagram for this object extends ~5 magnitudes below the tip of the red giant branch and exhibits features ...

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

    Lewis, Geraint F., Scott C. Chapman, Rodrigo A. Ibata, Michael J. Irwin, et al. 1998. "Submillimeter Observations of the Ultraluminous BAL Quasar APM 08279+5255." The Astrophysical Journal 505(1): 1-L5
    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 ...

  • SCUBA observations of Hawaii 167 

    Lewis, Geraint F., and Scott C. Chapman. 2000. "SCUBA observations of Hawaii 167." Monthly Notices of the Royal Astronomical Society 318(3): 31-L33
    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 ...

  • The LABOCA survey of the Extended Chandra Deep Field South: Two modes of star formation in AGN hosts? 

    Lutz, D., V. Mainieri, D. Rafferty, L. Shao, et al. 2010. "The LABOCA survey of the Extended Chandra Deep Field South: Two modes of star formation in AGN hosts?." The Astrophysical Journal 712(2):1287.
    We study the co-existence of star formation and AGN activity in X-ray selected AGN by analyzing stacked 870um submm emission from a deep and wide map of the Extended Chandra Deep Field South, obtained with LABOCA at the ...

  • Inside the whale: the structure and dynamics of the isolated Cetus dwarf spheroidal 

    Lewis, G. F., R. A. Ibata, S. C. Chapman, A. McConnachie, et al. 2007. "Inside the whale: the structure and dynamics of the isolated Cetus dwarf spheroidal." Monthly Notices of the Royal Astronomical Society 375(4): 1364-1370
    This paper presents a study of the Cetus dwarf, an isolated dwarf galaxy within the Local Group. A matched-filter analysis of the INT/WFC imaging of this system reveals no evidence for significant tidal debris that could ...

  • The Chandra Deep Protocluster Survey: Point-Source Catalogs for a 400 ks Observation of the z = 3.09 Protocluster in SSA22 

    Lehmer, B. D., D. M. Alexander, S. C. Chapman, Ian Smail, et al. 2009. "The Chandra Deep Protocluster Survey: Point-Source Catalogs for a 400 ks Observation of the z = 3.09 Protocluster in SSA22." Monthly Notices of the Royal Astronomical Society 400:299.
    We present X-ray point-source catalogs for a deep 400 ks Chandra ACIS-I exposure of the SSA22 field. The observations are centred on a z = 3.09 protocluster, which is populated by Lyman break galaxies (LBGs), Lyalpha ...

  • The Chandra Deep Protocluster Survey: Evidence for an Enhancement in the AGN Activity in the SSA22 Protocluster at z = 3.09 

    Lehmer, B. D., D. M. Alexander, J. E. Geach, Ian Smail, et al. 2009. "The Chandra Deep Protocluster Survey: Evidence for an Enhancement in the AGN Activity in the SSA22 Protocluster at z = 3.09." The Astrophysical Journal 691(1): 687-695
    We present results from a new ultra-deep 400 ks Chandra observation of the SSA22 protocluster at z = 3.09. We have studied the X-ray properties of 234 z ~ 3 Lyman break galaxies (LBGs; protocluster and field) and 158 z = ...

  • Submillimetre observations of a sample of broad absorption line quasars 

    Lewis, Geraint F., Scott C. Chapman, and Zdenka Kuncic. 2003. "Submillimetre observations of a sample of broad absorption line quasars." The Astrophysical Journal 596(1): 35-L38
    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 ...

  • The Infrared Array Camera component of the Spitzer Space Telescope Extragalactic First Look Survey 

    Lacy, M., G. Wilson, F. Masci, L. J. Storrie-Lombardi, et al. 2005. "The Infrared Array Camera component of the Spitzer Space Telescope Extragalactic First Look Survey." The Astrophysical Journal Supplement Series 161(1): 41-52
    We present Infrared Array Camera (IRAC) data and source catalogs from the Spitzer Space Telescope Extragalactic First Look Survey. The data were taken in four broad bands centered at nominal wavelengths of 3.6, 4.5, 5.8 ...

  • The LABOCA survey of the Extended Chandra Deep Field South - radio and mid-infrared counterparts to submillimetre galaxies 

    Biggs, A. D., R. J. Ivison, E. Ibar, J. L. Wardlow, et al. 2010. "The LABOCA survey of the Extended Chandra Deep Field South - radio and mid-infrared counterparts to submillimetre galaxies." Monthly Notices of the Royal Astronomical Society 413:2314.
    We present radio and infrared (3.6-24um) counterparts to submillimetre galaxies (SMGs) detected in the Extended Chandra Deep Field South with the LABOCA 870-um bolometer camera on the 12-m Atacama Pathfinder Experiment. ...

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

    Lewis, Geraint F., Robert Braun, Alan W. McConnachie, Michael J. Irwin, et al. 2012. "PAndAS in the mist: The stellar and gaseous mass within the halos of M31 and M33." The Astrophysical Journal 763:4.
    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 ...

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

    Lewis, Geraint F., Scott C. Chapman, and George Helou. 2005. "Modeling the evolution of infrared luminous galaxies: the influence of the Luminosity-Temperature distribution." The Astrophysical Journal 621(1): 32-40
    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 ...

  • A robust sample of submillimetre galaxies: constraints on the prevalence of dusty, high-redshift starbursts 

    Ivison, R. J., Ian Smail, J. S. Dunlop, T. R. Greve, et al. 2005. "A robust sample of submillimetre galaxies: constraints on the prevalence of dusty, high-redshift starbursts." Monthly Notices of the Royal Astronomical Society 364(3): 1025-1040
    The modest significance of most sources detected in current submm surveys can potentially compromise some analyses due to the inclusion of spurious sources in catalogues typically selected at >3.0-3.5sigma. Here, we develop ...

  • Tracing the molecular gas in distant submillimetre galaxies via CO(1-0) imaging with the EVLA 

    Ivison, R. J., P. P. Papadopoulos, Ian Smail, T. R. Greve, et al. 2010. "Tracing the molecular gas in distant submillimetre galaxies via CO(1-0) imaging with the EVLA." Monthly Notices of the Royal Astronomical Society 412:1913.
    We report the results of a pilot study with the EVLA of 12CO J=1-0 emission from four SMGs at z=2.2-2.5, each with an existing detection of CO J=3-2. Using the EVLA's most compact configuration we detect strong, broad J=1-0 ...

  • Do globular clusters possess Dark Matter halos? A case study in NGC 2419 

    Ibata, Rodrigo, Carlo Nipoti, Antonio Sollima, Michele Bellazzini, et al. 2012. "Do globular clusters possess Dark Matter halos? A case study in NGC 2419." Monthly Notices of the Royal Astronomical Society 428(4):3648.
    We use recently published measurements of the kinematics, surface brightness and stellar mass-to-light ratio of the globular cluster NGC 2419 to examine the possibility that this Galactic halo satellite is embedded in a ...

  • AEGIS20: a radio survey of the Extended Groth Strip 

    Ivison, R. J., S. C. Chapman, S. M. Faber, Ian Smail, et al. 2007. "AEGIS20: a radio survey of the Extended Groth Strip." The Astrophysical Journal 660(1): 77-L80
    We describe AEGIS20 - a radio survey of the Extended Groth Strip (EGS) conducted with the Very Large Array (VLA) at 1.4GHz. The resulting catalog contains 1,123 emitters and is sensitive to ultraluminous starbursts to z1 ...

  • Kinematic and Chemical constraints on the formation of M31's inner and outer halo 

    Koch, A., R. M. Rich, D. B. Reitzel, N. F. Martin, et al. 2007. "Kinematic and Chemical constraints on the formation of M31's inner and outer halo." The Astrophysical Journal 689 (2):958
    The halo of M31 shows a wealth of substructures that are consistent with satellite accretion. Here we report on kinematic and abundance results from Keck/DEIMOS spectroscopy in the calcium triplet region of over 3500 red ...

  • SHARC-2 350 Micron Observations of Distant Submillimeter Selected Galaxies 

    Kovacs, A., S. C. Chapman, C. D. Dowell, A. W. Blain, et al. 2006. "SHARC-2 350 Micron Observations of Distant Submillimeter Selected Galaxies." The Astrophysical Journal 650(2): 592-603
    We present 350 micron observations of 15 Chapman et al. submillimeter galaxies (SMGs) with radio counterparts and optical redshifts. We detect 12 and obtain sensitive upper limits for three, providing direct, precise ...

  • Rest-frame optical and far-infrared observations of extremely bright Lyman-break galaxy candidates at z ~ 2.5 

    Ivison, Rob, Ian Smail, Misty Bentz, Jason Stevens, et al. 2005. "Rest-frame optical and far-infrared observations of extremely bright Lyman-break galaxy candidates at z ~ 2.5." Monthly Notices of the Royal Astronomical Society 362(2): 535-541
    We have investigated the rest-frame optical and far-infrared properties of a sample of extremely bright candidate Lyman-break galaxies (LBG) identified in the Sloan Digital Sky Survey. Their high ultraviolet luminosities ...