Browsing by Author "Geach, James"

Now showing items 1-16 of 16

    • A 100 kpc inverse Compton x-ray halo around 4C 60.07 at z = 3.79 

      Smail, I.; Lehmer, B.D.; Ivison, R.J.; Alexander, D.M.; Bower, R.; Stevens, J. A.; Geach, James; Scharf, C.; Coppin, Kristen; van Breugel, W. (2009)
      We analyze a 100 ks Chandra observation of the powerful radio galaxy, 4C 60.07 at z = 3.79. We identify extended X-ray emission with L X ~ 1045 erg s–1 across a ~90 kpc region around the radio galaxy. The energetics of ...

    • Cold dust emission from X-ray AGN in the SCUBA-2 Cosmology Legacy Survey : dependence on luminosity, obscuration & AGN activity 

      Banerji, Manda; McMahon, R.G.; Willott, C.J.; Geach, James; Harrison, C. M.; Alaghband-Zadeh, S.; Alexander, D. M.; Bourne, N.; Coppin, Kristen; Dunlop, J. S.; Farrah, D.; Jarvis, M.; Michalowski, M. J.; Page, M.; Smith, Daniel; Swinbank, A.M.; Symeonidis, M.; van der Werf, P. P. (2015-11-21)
      We study the 850um emission in X-ray selected AGN in the 2 sq-deg COSMOS field using new data from the SCUBA-2 Cosmology Legacy Survey. We find 19 850um bright X-ray AGN in a high-sensitivity region covering 0.89 sq-deg ...

    • Constraints on the circumstellar dust around KIC 8462852 

      Thompson, M.A.; Scicluna, Peter; Kemper, F.; Geach, James; Dunham, M. M.; Morata, Oscar; Ertel, S.; Ho, Paul T. P.; Dempsey, J. T.; Coulson, I.M.; Petitpas, G.; Kristensen, L. (2016-05-01)
      We present millimetre (SMA) and sub-millimetre (SCUBA-2) continuum observations of the peculiar star KIC 8462852 which displayed several deep and aperiodic dips in brightness during the Kepler mission. Our observations are ...

    • The discovery of a massive supercluster at z = 0.9 in the UKIDSS Deep eXtragalactic Survey 

      Swinbank, A.M.; Edge, A.C.; Smail, I.; Stott, J.P.; Bremer, M.; Sato, Y.; van Breukelen, C.; Jarvis, M.J.; Waddington, I.; Clewley, L.; Bergeron, J.; Cotter, G.; Dye, S.; Geach, James; Gonzalez-Solares, E.; Hirst, P.; Ivison, R.J.; Rawlings, S.; Simpson, C.; Smith, G.P.; Verma, A.; Yamada, T. (2007)

    • The Herschel ATLAS 

      Eales, S.; Dunne, L.; Clements, D.; Cooray, A.; de Zotti, G.; Dye, S.; Ivison, R.; Jarvis, M.J.; Lagache, G.; Maddox, S.; Negrello, M.; Serjeant, S.; Thompson, Mark; van Kampen, E.; Amblard, A.; Andreani, P.; Baes, M.; Beelen, A.; Bendo, G. J.; Benford, D.; Bertoldi, F.; Bock, J.; Bonfield, D.; Boselli, A.; Bridge, C.; Buat, V.; Burgarella, D.; Carlberg, R.; Cava, A.; Chanial, P.; Charlot, S.; Christopher, N.; Coles, P.; Cortese, L.; Dariush, A.; da Cunha, E.; Dalton, G.; Danese, L.; Dannerbauer, H.; Driver, S.; Dunlop, J.; Fan, L.; Farrah, D.; Frayer, D.; Frenk, C.; Geach, James; Gardner, J.; Gomez, H.; González-Nuevo, J.; González-Solares, E.; Griffin, M.; Hardcastle, M.J.; Hatziminaoglou, E.; Herranz, D.; Hughes, D.; Ibar, E.; Jeong, W.-S.; Lacey, C.; Lapi, A.; Lawrence, A.; Lee, M.; Leeuw, L.; Liske, J.; López-Caniego, M.; Müller, T.; Nandra, K.; Panuzzo, P.; Papageorgiou, A.; Patanchon, G.; Peacock, J.; Pearson, C.; Phillipps, S.; Pohlen, M.; Popescu, C.; Rawlings, S.; Rigby, E.; Rigopoulou, M.; Robotham, A.; Rodighiero, G.; Sansom, A.; Schulz, B.; Scott, D.; Smith, Daniel; Sibthorpe, B.; Smail, I.; Stevens, J.; Sutherland, W.; Takeuchi, T.; Tedds, J.; Temi, P.; Tuffs, R.; Trichas, M.; Vaccari, M.; Valtchanov, I.; van der Werf, P.; Verma, A.; Vieria, J.; Vlahakis, C.; White, G.J. (2010-05-01)
      The Herschel ATLAS is the largest open-time key project that will be carried out on the Herschel Space Observatory. It will survey 570 deg2 of the extragalactic sky, 4 times larger than all the other Herschel extragalactic ...

    • The Herschel Filament : a signature of the environmental drivers of galaxy evolution during the assembly of massive clusters at z=0.9 

      Coppin, Kristen; Geach, James; Webb, Tracy; Faloon, Ashley; Yan, Renbin; O'Donnell, Daniel; Ouellette, Nathalie; Egami, Eiichi; Ellingson, Erica; Gilbank, David; Hicks, Amalia; Felipe Barrientos, L.; Yee, Howard; Gladders, Michael (2012)
      We have discovered a 2.5 Mpc (projected) long filament of infrared-bright galaxies connecting two of the three ~5x10^14 Msun clusters making up the RCS 2319+00 supercluster at z=0.9. The filament is revealed in a deep ...

    • Herschel-Astrophysical Terahertz Large Area Survey: detection of a far-infrared population around galaxy clusters 

      Coppin, Kristen; Geach, James; Smail, Ian; Dunne, L.; Edge, A.C.; Ivison, R. J.; Maddox, S.; Auld, R.; Baes, M.; Buttiglione, S.; Cava, A.; Clements, D. L.; Cooray, A.; Dariush, A.; De Zotti, G.; Dye, S.; Eales, S.; Fritz, J.; Hopwood, R.; Ibar, E.; Jarvis, M.J.; Michalowski, M. J.; Murphy, D. N. A.; Negrello, M.; Pascale, E.; Pohlen, M.; Rigby, E.; Rodighiero, G.; Scott, D.; Serjeant, S.; Smith, Daniel; Temi, P.; van der Werf, P. (2011-09)
      We report the detection of a significant excess in the surface density of far-infrared sources from the Herschel-Astrophysical Terahertz Large Area Survey within similar to 1Mpc of the centres of 66 optically selected ...

    • The SCUBA-2 Cosmology Legacy Survey : ALMA resolves the bright-end of the sub-millimeter number counts 

      Simpson, James; Smail, Ian; Swinbank, Mark; Chapman, Scott; Geach, James; Ivison, Rob; Thomson, Alasdair; Aretxaga, Itziar; Blain, Andrew; Cowley, Will; Chen, Chian-Chou; Coppin, Kristen; Dunlop, Jim; Edge, Alastair; Farrah, Duncan; Ibar, Edo; Karim, Alex; Knudsen, Kirsten; Meijerink, Rowin; Michalowski, Michal; Scott, Douglas; Spanns, Marco; Werf, Paul van der (2015-07-10)
      We present high-resolution 870-um ALMA continuum maps of 30 bright sub-millimeter sources in the UKIDSS UDS field. These sources are selected from deep, 1-square degrees 850-um maps from the SCUBA--2 Cosmology Legacy Survey, ...

    • The SCUBA-2 cosmology legacy survey : ALMA resolves the rest-frame far-infrared emission of sub-millimeter galaxies 

      Simpson, J. M.; Smail, Ian; Swinbank, A.M.; Almaini, O.; Blain, A. W.; Bremer, M.N.; Chapman, S.C.; Chen, Chian Chou; Conselice, C.; Coppin, Kristen; Danielson, A. L. R.; Dunlop, J. S.; Edge, A. C.; Farrah, D.; Geach, James; Hartley, W. G.; Ivison, R. J.; Karim, A.; Lani, C.; Ma, C. J.; Meijerink, R.; Michałowski, M. J.; Mortlock, A.; Scott, D.; Simpson, C. J.; Spaans, M.; Thomson, A. P.; van Kampen, E.; Van Der Werf, P. P. (2015-01-16)

    • A SCUBA-2 survey of FeLoBAL QSOs : Are FeLoBALs in a `transition phase' between ULIRGs and QSOs? 

      Coppin, Kristen; Stevens, Jason A.; Farrah, Duncan; Geach, James; Alexander, Dave M.; Hickox, Ryan C.; Smith, Daniel; Wardlow, Julie L.; Violino, Giulio (2016-04-01)
      It is thought that a class of broad absorption line (BAL) QSOs, characterised by Fe absorption features in their UV spectra (called `FeLoBALs'), could mark a transition stage between the end of an obscured starburst event ...

    • The Spitzer Extragalactic Representative Volume Survey (SERVS) : Survey Definition and Goals 

      Mauduit, J.C.; Lacy, M.; Farrah, D.; Surace, J. A.; Jarvis, M.J.; Oliver, S.; Maraston, C.; Vaccari, M.; Marchetti, L.; Zeimann, G.; Gonzáles-Solares, E. A.; Pforr, J.; Petric, A. O.; Henriques, B.; Thomas, P. A.; Afonso, J.; Rettura, A.; Wilson, G.; Falder, J. T.; Geach, James; Huynh, M.; Norris, R. P.; Seymour, N.; Richards, G.T.; Stanford, S. A.; Alexander, D.M.; Becker, R.H.; Best, P.N.; Bizzocchi, L.; Bonfield, D.; Castro, N.; Cava, A.; Chapman, S.; Christopher, N.; Clements, D. L.; Covone, G.; Dubois, N.; Dunlop, J. S.; Dyke, E.; Edge, A.; Ferguson, H. C.; Foucaud, S.; Franceschini, A.; Gal, R. R.; Grant, J. K.; Grossi, M.; Hatziminaoglou, E.; Hickey, S.; Hodge, J. A.; Huang, J. S.; Ivison, R. J.; Kim, M.; LeFevre, O.; Lehnert, M.; Lonsdale, C.J.; Lubin, L. M.; McLure, R. J.; Messias, H.; Martínez-Sansigre, A.; Mortier, A. M. J.; Nielsen, D. M.; Ouchi, M.; Parish, G.; Perez-Fournon, I.; Pierre, M.; Rawlings, S.; Readhead, A.; Ridgway, S. E.; Rigopoulou, D.; Romer, A. K.; Rosebloom, I. G.; Rottgering, H.J.A.; Rowan-Robinson, M.; Sajina, A.; Simpson, C.J.; Smail, I.; Squires, G.K.; Stevens, J. A.; Taylor, R.; Trichas, M.; Urrutia, T.; van Kampen, E.; Verma, A.; Xu, C. K. (2012-08)
      We present the Spitzer Extragalactic Representative Volume Survey (SERVS), an 18 deg2 medium-deep survey at 3.6 and 4.5 μm with the postcryogenic Spitzer Space Telescope to ≈2 μJy (AB = 23.1) depth of five highly observed ...

    • The star formation history of BCGs to z = 1.8 from the SpARCS/SWIRE survey : evidence for significant in situ star formation at high redshift 

      Webb, Tracy M. A.; Muzzin, Adam; Noble, Allison; Bonaventura, Nina; Geach, James; Hezevah, Yashar; Lidman, Chris; Wilson, Gillian; Yee, H. K. C.; Surace, Jason; Shupe, David (2015-12-01)
      We present the results of an MIPS-24 μm study of the brightest cluster galaxies (BCGs) of 535 high-redshift galaxy clusters. The clusters are drawn from the Spitzer Adaptation of the Red-Sequence Cluster Survey, which ...

    • Stellar feedback as the origin of an extended molecular outflow in a starburst galaxy 

      Geach, James; Hickox, R. C.; Diamond-Stanic, A. M.; Krips, M.; Rudnick, G. H.; Tremonti, C. A.; Sell, P. H.; Coil, A. L.; Moustakas, J. (2014-12-04)
      Recent observations have revealed that starburst galaxies can drive molecular gas outflows through stellar radiation pressure. Molecular gas is the phase of the interstellar medium from which stars form, so these outflows ...

    • A submillimetre galaxy at z=4.76 in the LABOCA survey of the Extended Chandra Deep Field South 

      Coppin, Kristen; Smail, Ian; M. Alexander, David; Weiss, Axel; Walter, Fabian; Swinbank, Mark; Greve, Thomas; Kovacs, Attila; De Breuck, Carlos; Dickinson, Mark; Ibar, Edo; Ivison, Rob; Reddy, Naveen; Spinrad, Hyron; Stern, Daniel; Brandt, Niel; Chapman, Scott; Dannerbauer, Helmut; van Dokkum, Pieter; Dunlop, James; Frayer, David; Gawiser, Eric; Geach, James; Huynh, Minh; Knudsen, Kirsten; Koekemoer, Anton; Lehmer, Bret; Menten, Karl; Papovich, Casey; Rix, Hans-Walter; Schinnerer, Eva; Wardlow, Julie; van der Werf, Paul (2009)
      We report on the identification of the highest redshift submm-selected source currently known: LESSJ033229.4-275619. This source was detected in the Large Apex BOlometer CAmera (LABOCA) Extended Chandra Deep Field South ...

    • A submillimetre-bright z~3 overdensity behind a z~1 supercluster revealed by SCUBA-2 and Herschel 

      Noble, A. G.; Geach, James; van Engelen, A.J.; Webb, T. M. A.; Coppin, Kristen; Delahaye, A.; Gilbank, David G.; Gladders, M.; J. Ivison, R.; Omori, Y.; Yee, H. K. C. (2013-11)
      We present a wide-field (30 arcmin diameter) 850 μm Submillimetre Common-User Bolometer Array-2 map of the spectacular three-component merging supercluster, RCS 231953+00, at z = 0.9. The brightest submillimetre galaxy ...

    • Weighing obscured and unobscured quasar hosts with the cosmic microwave background 

      DiPompeo, M.A.; Myers, A. D.; Hickox, R. C.; Geach, James; Holder, G.; Hainline, K.N.; Hall, S.W. (2015-02)
      We cross-correlate a cosmic microwave background (CMB) lensing map with the projected space densities of quasars to measure the bias and halo masses of a quasar sample split into obscured and unobscured populations, the ...