Browsing by Author "Geach, J. E."

Now showing items 1-20 of 55

    • ALMA observations of a z ≈ 3.1 protocluster : Star formation from active galactic nuclei and Lyman-alpha blobs in an overdense environment 

      Alexander, D. M.; Simpson, J. M.; Harrison, C. M.; Mullaney, J. R.; Smail, I.; Geach, J. E.; Hickox, R. C.; Karim, A.; Kubo, M.; Lehmer, B. D.; Matsuda, Y.; Rosario, D. J.; Stanley, F.; Swinbank, A. M.; Umehata, H.; Yamada, T.; Hine, Nancy (2016-09-21)
      We exploit Atacama Large Interferometer Array (ALMA) 870 μm observations to measure the star formation rates (SFRs) of eight X-ray detected active galactic nuclei (AGNs) in a z ≈ 3.1 protocluster, four of which reside in ...

    • An ALMA survey of the S2CLS UDS field: optically invisible submillimetre galaxies 

      Smail, Ian; Dudzevičiūtė, U.; Stach, S. M.; Almaini, O.; Birkin, J. E.; Chapman, S. C.; Chen, Chian-Chou; Geach, J. E.; Gullberg, B.; Hodge, J. A.; Ikarashi, S.; Ivison, R. J.; Scott, D.; Simpson, Chris; Swinbank, A. M.; Thomson, A. P.; Walter, F.; Wardlow, J. L.; Werf, P. van der (2021-04-01)
      We analyse a robust sample of 30 near-infrared-faint (KAB > 25.3, 5σ) submillimetre galaxies (SMGs) selected from a 0.96 deg2 field to investigate their properties and the cause of their faintness in optical/near-infrared ...

    • An ALMA survey of the SCUBA-2 CLS UDS field: physical properties of 707 sub-millimetre galaxies 

      Dudzevičiūtė, U.; Smail, Ian; Swinbank, A. M.; Stach, S. M.; Almaini, O.; Cunha, E. da; An, Fang Xia; Arumugam, V.; Birkin, J.; Blain, A. W.; Chapman, S. C.; Conselice, C. J.; Coppin, K. E. K.; Dunlop, J. S.; Farrah, D.; Geach, J. E.; Gullberg, B.; Hartley, W. G.; Hodge, J. A.; Ivison, R. J.; Maltby, D. T.; Scott, D.; Simpson, C. J.; Walter, F.; Wardlow, J. L.; Weiss, A.; Werf, P. van der (2020-05)
      We analyse the physical properties of a large, homogeneously selected sample of ALMA-located sub-mm galaxies (SMGs) detected in the SCUBA-2 CLS 850-$\mu$m map of the UKIDSS/UDS field. This survey, AS2UDS, identified 707 ...

    • An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field : Dust attenuation in high-redshift Lyman break Galaxies 

      Koprowski, M. P.; Coppin, K. E. K.; Geach, J. E.; Dudzeviciute, U.; Smail, Ian; Almaini, O.; An, Fangxia; Blain, A. W.; Chapman, S. C.; Chen, Chian-Chou; Conselice, C. J.; Dunlop, J. S.; Farrah, D.; Gullberg, B.; Hartley, W.; Ivison, R. J.; Karska, A.; Maltby, D.; Michałowski, M. J.; Pope, A.; Salim, S.; Scott, D.; Swinbank, A. M.; Wardlow, J. L.; Werf, P. P. van der; Whitaker, K. E. (2020-03)
      We analyse 870um Atacama Large Millimetre Array (ALMA) dust continuum detections of 41 canonically-selected z~3 Lyman-break galaxies (LBGs), as well as 209 ALMA-undetected LBGs, in follow-up of SCUBA-2 mapping of the UKIDSS ...

    • An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field : number counts of submillimeter galaxies 

      Stach, S. M.; Smail, I.; Swinbank, A. M.; Geach, J. E.; An, F. X.; Almaini, O.; Arumugam, V.; Blain, A. W.; Chapman, S. C.; Conselice, C. J.; Cooke, E. A.; Coppin, K. E. K.; Dunlop, J. S.; Farrah, D.; Gullberg, B.; Hartley, W.; Ivison, R. J.; Maltby, D. T.; Michałowski, M. J.; Scott, D.; Wardlow, J. L.; Werf, P. van der (2018-06-25)
      We report the first results of AS2UDS, an 870 μm continuum survey with the Atacama Large Millimeter/Submillimeter Array (ALMA) of a total area of ∼50 arcmin 2 comprising a complete sample of 716 submillimeter sources drawn ...

    • An ALMA survey of the SCUBA-2 Cosmology Legacy Survey UKIDSS/UDS field : Source catalogue and properties 

      Stach, S. M.; Dudzevičiūtė, U.; Smail, I.; Swinbank, A. M.; Geach, J. E.; An, F. X.; Almaini, O.; Arumugam, V.; Blain, A. W.; Chapman, S. C.; Conselice, C. J.; Cooke, E. A.; Coppin, K. E. K.; Cunha, E. da; Dunlop, J. S.; Farrah, D.; Gullberg, B.; Hodge, J. A.; Ivison, R. J.; Kocevski, Dale D.; Michałowski, M. J.; Miyaji, Takamitsu; Scott, D.; Wardlow, J. L.; Weiss, Axel; Werf, P. van der (2019-06-06)
      We present the catalogue and basic properties of sources in AS2UDS, an 870-\mum continuum survey with the Atacama Large Millimetre/sub-millimetre Array (ALMA) of 716 single-dish sub-millimetre sources detected in the ...

    • An ALMA survey of the SCUBA-2 Cosmology Legacy SurveyUKIDSS/UDS Field : Halo Masses for Submillimetre Galaxies 

      Stach, S. M.; Smail, I.; Amvrosiadis, A.; Swinbank, A. M.; Dudzevičiūtė, U.; Geach, J. E.; Almaini, O.; Birkin, J. E.; Chen, Chian-Chou; Conselice, C. J.; Cooke, E. A.; Coppin, K. E. K.; Dunlop, J. S.; Farrah, D.; Ikarashi, S.; Ivison, R. J.; Wardlow, J. L. (2021-03-10)
      We present an analysis of the spatial clustering of a large sample of high-resolution, interferometically identified, submillimetre galaxies (SMGs). We measure the projected cross-correlation function of ~350 SMGs in the ...

    • Ammonia in the interstellar medium of a starbursting disc at z=2.6 

      Doherty, M. J.; Geach, J. E.; Ivison, R. J.; Menten, K. M.; Jacob, A. M.; Forbrich, J.; Dye, S. (2022-09-23)
      We report the detection of the ground state rotational emission of ammonia, ortho-NH$_3$ $(J_K=1_0\rightarrow0_0)$ in a gravitationally lensed, intrinsically hyperluminous, star-bursting galaxy at $z=2.6$. The integrated ...

    • The angular clustering of infrared-selected obscured and unobscured quasars 

      DiPompeo, M. A.; Myers, A. D.; Hickox, R. C.; Geach, J. E.; Hainline, K. N. (2014-08-21)
      Recent studies of luminous infrared-selected active galactic nuclei (AGN) suggest that the reddest, most obscured objects display a higher angular clustering amplitude, and thus reside in higher mass darkmatter haloes. ...

    • The average submillimetre properties of Lyman-alpha Blobs at z=3 

      Hine, N. K.; Geach, J. E.; Matsuda, Y.; Lehmer, B. D.; Michalowski, M. J.; Farrah, D.; Spaans, M.; Oliver, S. J.; Smith, D. J. B.; Chapman, S. C.; Jenness, T.; Alexander, D. M.; Robson, I.; Werf, P. van der (2016-08-21)
      Ly-alpha blobs (LABs) offer insight into the complex interface between galaxies and their circumgalactic medium. Whilst some LABs have been found to contain luminous star-forming galaxies and active galactic nuclei that ...

    • An AzTEC 1.1-mm Survey for ULIRGs in the field of the Galaxy Cluster MS 0451.6-0305 

      Wardlow, J. L.; Smail, Ian; Wilson, G.W.; Yun, M. S.; Coppin, Kristen; Cybulski, R.; Geach, J. E.; Ivison, R.J.; Aretxaga, I.; Austermann, J.E.; Edge, A. C.; Fazio, G. G.; Huang, J.; Hughes, D. H.; Kodama, T.; Kang, Y.; Kim, S.; Perera, T. A.; Scott, K. S. (2010)
      We have undertaken a deep (sigma~1.1 mJy) 1.1-mm survey of the z=0.54 cluster MS 0451.6-0305 using the AzTEC camera on the James Clerk Maxwell Telescope. We detect 36 sources with S/N>3.5 in the central 0.10 deg^2 and ...

    • A blind CO detection of a distant red galaxy in the HS1700+64 protocluster 

      Chapman, S.C.; Bertoldi, F.; Smail, Ian; Blain, A. W.; Geach, J. E.; Gurwell, M.; Ivison, R. J.; Petitpas, G. R.; Reddy, N.; Steidel, C. C. (2015-05-01)

    • Cluster richness-mass calibration with cosmic microwave background lensing 

      Geach, J. E.; Peacock, J.A. (2017-11-01)
      Identifying galaxy clusters through overdensities of galaxies in photometric surveys is the oldest and arguably the most economic and mass-sensitive detection method, compared to X-ray and Sunyaev-Zel'dovich Effect surveys ...

    • Concurrent supermassive black hole and galaxy growth : linking environment and nuclear activity in z=2.23 alpha emitters 

      Lehmer, B.D.; Lucy, A. B.; Alexander, D.M.; Best, P.N.; Geach, J. E.; Harrison, C. M.; Hornschemeier, A. E.; Matsuda, Y.; Mullaney, J. R.; Smail, Ian; Sobral, D.; Swinbank, A.M. (2013-03-10)
      We present results from a approximate to 100 ks Chandra observation of the 2QZ Cluster 1004+00 structure at z = 2.23 (hereafter 2QZ Clus). 2QZ Clus was originally identified as an overdensity of four optically-selected ...

    • Cosmic evolution of the H2 mass density and the epoch of molecular gas 

      Garratt, T. K.; Coppin, K. E. K.; Geach, J. E.; Almaini, O.; Hartley, W. G.; Maltby, D. T.; Simpson, C. J.; Wilkinson, A.; Conselice, C. J.; Franco, M.; Ivison, R. J.; Koprowski, M. P.; Lovell, C. C.; Pope, A.; Scott, D.; Werf, P. van der (2021-05-05)
      We present new empirical constraints on the evolution of ρ H2, the cosmological mass density of molecular hydrogen, back to z ≈ 2.5. We employ a statistical approach measuring the average observed 850 μm flux density of ...

    • A deep ALMA image of the Hubble Ultra Deep Field 

      Dunlop, J. S.; McLure, R. J.; Biggs, A. D.; Geach, J. E.; Michalowski, M. J.; Ivison, R. J.; Rujopakarn, W.; Kampen, E. van; Kirkpatrick, A.; Pope, A.; Scott, D.; Swinbank, A. M.; Targett, T. A.; Aretxaga, I.; Austermann, J. E.; Best, P. N.; Bruce, V. A.; Chapin, E. L.; Charlot, S.; Cirasuolo, M.; Coppin, K. E. K.; Ellis, R. S.; Finkelstein, S. L.; Hayward, C. C.; Hughes, D. H.; Ibar, E.; Khochfar, S.; Koprowski, M. P.; Narayanan, D.; Papovich, C.; Peacock, J. A.; Robertson, B.; Vernstrom, T.; Werf, P. P. van der; Wilson, G. W.; Yun, M. (2017-04-01)
      We present the results of the first, deep ALMA imaging covering the full 4.5 sq arcmin of the Hubble Ultra Deep Field (HUDF) as previously imaged with WFC3/IR on HST. Using a mosaic of 45 pointings, we have obtained a ...

    • A direct calibration of the IRX-β relation in Lyman-break Galaxies at z=3-5 

      Koprowski, M. P.; Coppin, K. E. K.; Geach, J. E.; McLure, R. J.; Almaini, O.; Blain, A. W.; Bremer, M.; Bourne, N.; Chapman, S. C.; Conselice, C. J.; Dunlop, J. S.; Farrah, D.; Hartley, W.; Karim, A.; Knudsen, K. K.; Michałowski, M. J.; Scott, D.; Simpson, C.; Smith, D. J. B.; Werf, P. P. van der (2018-10)
      We use a sample of 4209 Lyman-break galaxies (LBGs) at z ≃ 3, 4, and 5 in the UKIRT Infrared Deep Sky Survey Ultra Deep Survey field to investigate the relationship between the observed slope of the stellar continuum ...

    • The dust and [CII] morphologies of redshift ~4.5 sub-millimeter galaxies at ~200pc resolution : The Absence of Large Clumps in the Interstellar Medium at High-redshift 

      Gullberg, B.; Swinbank, A. M.; Smail, I.; Biggs, A. D.; Bertoldi, F.; Breuck, C. De; Chapman, S. C.; Chen, C. -C.; Cooke, E. A.; Coppin, K. E. K.; Cox, P.; Dannerbauer, H.; Dunlop, J. S.; Edge, A. C.; Farrah, D.; Geach, J. E.; Greve, T. R.; Hodge, J.; Ibar, E.; Ivison, R. J.; Karim, A.; Schinnerer, E.; Scott, D.; Simpson, J. M.; Stach, S. M.; Thomson, A. P.; Werf, P. van der; Walter, F.; Wardlow, J. L.; Weiss, A. (2018-05-17)
      We present deep, high-resolution (0.″03, 200 pc) ALMA Band 7 observations covering the dust continuum and [C ii] λ157.7 μm emission in four z ∼4.4-4.8 sub-millimeter galaxies (SMGs) selected from the ALESS and AS2UDS ...

    • Dust attenuation in 2<z<3 star-forming galaxies from deep ALMA observations of the Hubble Ultra Deep Field 

      McLure, R. J.; Dunlop, J. S.; Cullen, F.; Bourne, N.; Best, P. N.; Khochfar, S.; Bowler, R. A. A.; Biggs, A. D.; Geach, J. E.; Scott, D.; Michalowski, M. J.; Rujopakarn, W.; Kampen, E. van; Kirkpatrick, A.; Pope, A. (2018-05-21)
      We present the results of a new study of the relationship between infrared excess (IRX ≡ L IR/L UV), ultraviolet (UV) spectral slope (β) and stellar mass at redshifts 2 < z < 3, based on a deep Atacama Large Millimeter ...

    • The Dynamics and Distribution of Angular Momentum in HiZELS Star-Forming Galaxies at z = 0.8 - 3.3 

      Gillman, S.; Swinbank, A. M.; Tiley, A. L.; Harrison, C. M.; Smail, Ian; Dudzevičiūtė, U.; Sharples, R. M.; Best, P. N.; Bower, R. G.; Cochrane, R.; Fisher, D.; Geach, J. E.; Glazebrook, K.; Ibar, Edo; Molina, J.; Obreschkow, D.; Schaller, M.; Sobral, D.; Sweet, S.; Trayford, J. W.; Theuns, T. (2019-06)
      We present adaptive optics assisted integral field spectroscopy of 34 star-forming galaxies at z = 0.8-3.3 selected from the HiZELS narrow-band survey. We measure the kinematics of the ionized interstellar medium on ∼1 kpc ...