Chapman, Scott: Recent submissions

Now showing items 21-40 of 211

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

    Chapman, S. C., L. Widrow, M. L. M. Collins, J. Dubinski, et al. 2012. "Dynamics in the satellite system of Triangulum: Is AndXXII a dwarf satellite of M33?." Monthly Notices of the Royal Astronomical Society 430(1): 37.
    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., W. N. Brandt, I. Smail, A. M. Swinbank, et al. 2008. "Weighing the Black Holes in z~2 Submillimeter-Emitting Galaxies Hosting Active Galactic Nuclei." The Astronomical Journal 135(5): 1968-1981
    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., Ian Smail, R. Windhorst, T. Muxlow, et al. 2004. "Evidence for extended, obscured starbursts in submm galaxies." The Astrophysical Journal 611(2): 732-738
    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., A. Shapley, C. Steidel, and R. Windhorst. 2002. "Westphal-MMD11: An interacting, submillimeter luminous Lyman break galaxy." The Astrophysical Journal 572(1): 1-L5
    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., Ian Smail, R. J. Ivison, and A. W. Blain. 2002. "The effect of lensing on the identification of bright SCUBA galaxies." Monthly Notices of the Royal Astronomical Society 335(1): 17-L21
    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., R. Neri, F. Bertoldi, Ian Smail, et al. 2008. "Interferometric CO Observations of submillimeter-faint, radio-selected starburst galaxies at z~2." The Astrophysical Journal 689(2): 889-896
    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., R. J. Ivison, I. G. Roseboom, R. Auld, et al. 2010. "Herschel-SPIRE, Far-Infrared Properties of Millimetre-Bright and -Faint Radio Galaxies." Monthly Notices of the Royal Astronomical Society 409: L13.
    (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., D. Scott, R. A. Windhorst, D. T. Frayer, et al. 2004. "Further multiwavelength observations of the SSA22 Ly_alpha emitting `blob'." The Astrophysical Journal 606(1): 85-91
    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., R. Windhorst, S. Odewahn, H. Yan, et al. 2003. "Hubble Space Telescope images of submillimeter sources: large, irregular galaxies at high redshift." The Astrophysical Journal 599(1): 92-104
    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., R. Ibata, G. F. Lewis, A. M. N. Ferguson, et al. 2006. "A kinematically selected, metal-poor stellar halo in the outskirts of M31." The Astrophysical Journal 653(1): 255-266
    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., R. Ibata, M. Irwin, A. Koch, et al. 2008. "The kinematic footprints of five stellar streams in Andromeda's halo." Monthly Notices of the Royal Astronomical Society 390(4): 1437
    (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., E. Richards, G. Lewis, G. Wilson, et al. 2001. "The nature of the bright submillimeter galaxy population: a radio pre-selected sample with I>25." The Astrophysical Journal 548(2): 147-L151
    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., I. Smail, R. J. Ivison, G. Helou, et al. 2002. "Optically faint counterparts to the ISO-FIRBACK 170 micron population: the discovery of cold, luminous galaxies at high redshift." The Astrophysical Journal 573(1): 66-74
    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., P. McCarthy, and S. E. Persson. 2000. "Radio galaxy selected clusters at high redshift and associated ERO overdensities." The Astronomical Journal120(4): 1612-1625
    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 ...

  • Molecular Gas in Submillimetre-Faint, Star-Forming Ultraluminous Galaxies at z>1 

    Casey, C. M., S. C. Chapman, R. Neri, F. Bertoldi, et al. 2009. "Molecular Gas in Submillimetre-Faint, Star-Forming Ultraluminous Galaxies at z>1." Monthly Notices of the Royal Astronomical Society 415:2723.
    [abridged] We present interferometric CO observations of twelve z~2 submillimetre-faint, star-forming radio galaxies (SFRGs) which are thought to be ultraluminous infrared galaxies (ULIRGs) possibly dominated by warmer ...

  • Spectroscopic Characterisation of 250um-Selected Hyper-Luminous Star Forming Galaxies 

    Casey, C. M., S. C. Chapman, Ian Smail, S. Alaghband-Zadeh, et al. 2010. "Spectroscopic Characterisation of 250um-Selected Hyper-Luminous Star Forming Galaxies." Monthly Notices of the Royal Astronomical Society 411:2739.
    We present near-infrared spectroscopic observations from VLT ISAAC of thirteen 250\mu m-luminous galaxies in the CDF-S, seven of which have confirmed redshifts which average to = 2.0 \pm 0.4. Another two sources of the 13 ...

  • A Redshift Survey of the Submillimeter Galaxy Population 

    Chapman, S. C., A. W. Blain, Ian Smail, and R. J. Ivison. 2005. "A Redshift Survey of the Submillimeter Galaxy Population." The Astrophysical Journal 622(2): 772-796
    We have obtained spectroscopic redshifts using the Keck-I telescope for a sample of 73 submillimeter (submm) galaxies for which precise positions are available. The galaxies lie at redshifts out to z=3.6, with a median ...

  • Density Variations in the NW Star Stream of M31 

    Carlberg, R. G., Harvey B. Richer, Alan W. McConnachie, Mike Irwin, et al. 2011. "Density Variations in the NW Star Stream of M31." The Astrophysical Journal 731:124.
    The Pan Andromeda Archeological Survey (PAndAS) CFHT Megaprime survey of the M31-M33 system has found a star stream which extends about 120 kpc NW from the center of M31. The great length of the stream, and the likelihood ...

  • Constraining Star Formation and AGN in z~2 Massive Galaxies using High Resolution MERLIN Radio Observations 

    Casey, Caitlin M., Scott C. Chapman, Tom W. B. Muxlow, Rob J. Beswick, et al. 2009. "Constraining Star Formation and AGN in z~2 Massive Galaxies using High Resolution MERLIN Radio Observations." Monthly Notices of the Royal Astronomical Society 395(3): 1249-1256
    We present high spatial resolution MERLIN 1.4GHz radio observations of two high redshift (z~2) sources, RGJ123623 (HDF147) and RGJ123617 (HDF130), selected as the brightest radio sources from a sample of submillimetre-faint ...

  • A Search for Neutral Carbon towards two z=4.05 Submillimetre Galaxies, GN20 and GN20.2 

    Casey, C. M., S. C. Chapman, E. Daddi, H. Dannerbauer, et al. 2009. "A Search for Neutral Carbon towards two z=4.05 Submillimetre Galaxies, GN20 and GN20.2." Monthly Notices of the Royal Astronomical Society 400:670.
    Using the IRAM Plateau-de-Bure Interferometer (PdBI) we have searched for the upper fine structure line of neutral carbon (CI(2->1), nu_rest = 809 GHz) and 12CO(J=7->6) (nu_rest=806GHz) towards the submillimetre galaxies ...