Browsing Research publications by Author "Jarvis, M.J."

Now showing items 1-20 of 167

    • A 3 x 10 solar mass black hole in the quasar SDSS J1148+5251 at z=6.41 

      Willott, C.J.; McLure, R.J.; Jarvis, M.J. (2003)
      We present near-infrared H- and K-band spectra of the z p 6.41 quasar SDSS J114816.64 525150.3. The spectrum reveals a broad Mg ii l2799 emission line with an FWHM of 6000 km s 1. From the peak wavelength of this emission ...

    • A 325-MHz GMRT survey of the Herschel-ATLAS/GAMA fields 

      Mauch, T.; Kloeckner, H-R.; Rawlings, S.; Jarvis, M.J.; Hardcastle, M.J.; Obreschkow, D.; Saikia, D.J.; Thompson, M.A. (2013-10-01)
      We describe a 325-MHz survey, undertaken with the Giant Metrewave Radio Telescope (GMRT), which covers a large part of the three equatorial fields at 9, 12 and 14.5 h of right ascension from the Herschel-Astrophysical ...

    • The 6** sample and the highest redshift radio galaxies 

      Cruz, M.J.; Jarvis, M.J.; Blundell, K.M.; Rawlings, S. (World Scientific Publishing, 2004)
      We present a new radio sample, 6C** designed to find radio galaxies at z > 4 and discuss some of its near-infrared imaging follow-up results.

    • The 6C** sample of steep-spectrum radio sources: I - Radio data, near-infrared imaging and optical spectroscopy 

      Cruz, M.J.; Jarvis, M.J.; Blundell, K.M.; Rawlings, S.; Croft, S.; Kloeckner, H-R.; McLure, R.J.; Simpson, C.; Targett, T.A.; Willott, C.J. (2006)
      We present basic observational data on the 6C** sample. This is a new sample of radio sources drawn from the 151MHz 6C survey, which was filtered with radio criteria chosen to optimize the chances of finding radio galaxies ...

    • The 6C** sample of steep-spectrum radio sources: II - Redshift distribution and the space density of high-redshift radio galaxies 

      Cruz, M.J.; Jarvis, M.J.; Rawlings, S.; Blundell, K.M. (2007)
      We use the 6C** sample to investigate the co-moving space density of powerful, steep- spectrum radio sources. This sample, consisting of 68 objects, has virtually complete K-band photometry and spectroscopic redshifts for ...

    • An 80-kpc Ly alpha halo around a high-redshift type-2 quasi-stellar object 

      Smith, Daniel; Jarvis, M.J.; Simpson, C.; Martinez-Sansigre, A. (2009)
      We announce the discovery of an extended emission line region associated with a high redshift type-2 QSO. The halo, which was discovered in our new wide-field narrow-band survey, resides at z = 2.85 in the Spitzer First ...

    • The accretion history of the Universe with the Square Kilometre Array 

      Jarvis, M.J.; Rawlings, S. (2004)
      In this paper we investigate how the Square Kilometre Array (SKA) can aid in determining the evolutionary history of active galactic nuclei (AGN) from redshifts z = 0 ! 6. Given the vast collecting area of the SKA, it will ...

    • Black hole masses, accretion rates and hot- and cold-mode accretion in radio galaxies at z ~ 1 

      Fernandes, Cristina A. C.; Jarvis, M.J.; Martínez-Sansigre, Alejo M. S.; Rawlings, Steve G.; Afonso, José M.; Hardcastle, M.J.; Lacy, Mark; Stevens, Jason A.; Vardoulaki, Eleni (2015-02-21)
      Understanding the evolution of accretion activity is fundamental to our understanding of how galaxies form and evolve over the history of the Universe. We analyse a complete sample of 27 radio galaxies which includes both ...

    • Blind detections of CO J=1-0 IN 11 H-ATLAS Galaxies at z=2.1-3.5 with the GBT/Zpectrometer 

      Harris, A.I.; Baker, A. J.; Frayer, D. T.; Smail, Ian; Swinbank, A.M.; Riechers, D. A.; van der Werf, P. P.; Auld, R.; Baes, M.; Bussmann, R. S.; Buttiglione, S.; Cava, A.; Clements, D. L.; Cooray, A.; Dannerbauer, H.; Dariush, A.; De Zotti, G.; Dunne, L.; Dye, S.; Eales, S.; Fritz, J.; Gonzalez-Nuevo, J.; Hopwood, R.; Ibar, E.; Ivison, R. J.; Jarvis, M.J.; Maddox, S.; Negrello, M.; Rigby, E.; Smith, Daniel; Temi, P.; Wardlow, J. (2012-06-20)
      We report measurements of the carbon monoxide ground state rotational transition ((CO)-C-12-O-16 J = 1-0) with the Zpectrometer ultrawideband spectrometer on the 100 m diameter Green Bank Telescope. The sample comprises ...

    • The cluster environments of radio-loud AGN 

      Ineson, Judith; Croston, J.H.; Hardcastle, M.J.; Kraft, Ralph; Evans, Daniel; Jarvis, M.J. (Cambridge University Press, 2015)
      Radio-loud AGN play an important role in galaxy evolution. We need to understand their properties, and the processes that affect their behaviour in order to model galaxy formation and development. We here present preliminary ...

    • The clustering of subp-mJy radio sources in the Bootes Deep Field 

      Wilman, R.J.; Rottgering, H.J.A.; Overzier, R.A.; Jarvis, M.J. (2003)

    • A comprehensive view of a strongly lensed planck-associated submillimeter galaxy 

      Fu, Hai; Jullo, E.; Cooray, A.; Bussmann, R. S.; Ivison, R. J.; Perez-Fournon, I.; Djorgovski, S.G.; Scoville, N.; Yan, L.; Riechers, D. A.; Aguirre, J.; Auld, R.; Baes, M.; Baker, A. J.; Bradford, M.; Cava, A.; Clements, D. L.; Dannerbauer, H.; Dariush, A.; De Zotti, G.; Dole, H.; Dunne, L.; Dye, S.; Eales, S.; Frayer, D.; Gavazzi, R.; Gurwell, M.; Harris, A.I.; Herranz, D.; Hopwood, R.; Hoyos, C.; Ibar, E.; Jarvis, M.J.; Kim, S.; Leeuw, L.; Lupu, R.; Maddox, S.; Martinez-Navajas, P.; Michalowski, M. J.; Negrello, M.; Omont, A.; Rosenman, M.; Scott, D.; Serjeant, S.; Smail, I.; Swinbank, A.M.; Valiante, E.; Verma, A.; Vieira, J.; Wardlow, J. L.; van der Werf, P. (2012-07-10)
      We present high-resolution maps of stars, dust, and molecular gas in a strongly lensed submillimeter galaxy (SMG) at z = 3.259. HATLAS J114637.9-001132 is selected from the Herschel-Astrophysical Terahertz Large Area Survey ...

    • Constraints on star-forming galaxies at z≥ 6.5 from HAWK-I Y-band imaging of GOODS-South 

      Hickey, S.; Bunker, A.; Jarvis, M.J.; Chiu, K.; Bonfield, D. (2010)
      We present the results of our search for high-redshift Lyman-break galaxies over the GOODS-South field. We use Hubble Space Telescope (HST)-ACS data in B, V, i' & z', Very Large Telescope (VLT)-ISAAC J and Ks, Spitzer–Infrared ...

    • The contribution of high-redshift galaxies to cosmic reionization : new results from deep WFC3 imaging of the Hubble Ultra Deep Field 

      Bunker, A.; Wilkins, S.; Ellis, R.S.; Stark, D.; Lorenzoni, S.; Chiu, K.; Lacy, M.; Jarvis, M.J.; Hickey, S. (2010)
      We have searched for star-forming galaxies at z≈ 7–10 by applying the Lyman-break technique to newly released Y-, J- and H-band images (1.1, 1.25 and 1.6 μm) from Wide Field Camera 3 (WFC3) on the Hubble Space Telescope. ...

    • The cosmic evolution of low-luminosity radio sources from the Sloan Digital Sky Survey Data Release 1 

      Clewley, L.; Jarvis, M.J. (2004)

    • Cosmological measurements with forthcoming radio continuum surveys. 

      Raccanelli, Alvise; Zhao, Gong-Bo; Bacon, David J.; Jarvis, M.J.; Percival, Will J.; Norris, Ray P.; Rottgering, Huub; Abdalla, Filipe B.; Cress, Catherine M.; Kubwimana, Jean-Claude; Lindsay, Sam; Nichol, Robert C.; Santos, Mario G.; Schwarz, Dominik J. (2012-08)
      We present forecasts for constraints on cosmological models that can be obtained using the forthcoming radio continuum surveys: the wide surveys with the Low Frequency Array (LOFAR) for radio astronomy, the Australian ...

    • Deep spitzer observations of infrared-faint radio sources : high-redshift radio-loud active galactic nuclei? 

      Norris, R.P.; Afonso, J.; Cava, A.; Farrah, D.; Huynh, M.T.; Ivison, R.J.; Jarvis, M.J.; Lacy, M.; Mao, M.; Maraston, C.; Mauduit, J.C.; Middelberg, E.; Oliver, S.; Seymour, N.; Surace, J. (2011)
      Infrared-faint radio sources (IFRSs) are a rare class of objects which are relatively bright at radio wavelengths but very faint at infrared and optical wavelengths. Here we present sensitive near-infrared observations of ...

    • Deep Westerbork 1.4 GHz imaging of the Bootes field 

      de Vries, W.H.; Morganti, R.; Rottgering, H.J.A.; Vermeulen, R.; van Breugel, W.; Rengelink, R.; Jarvis, M.J. (2002)

    • A deep, high-resolution survey at 74MHz 

      Cohen, A.S.; Rottgering, H.J.A.; Jarvis, M.J.; Kassim, N.E.; Lazio, T.J.W. (2004)

    • Design drivers for a wide-field multi-object spectrograph for the William Herschel Telescope 

      Balcells, M.; Benn, C.; Carter, D.; Dalton, G.; Trager, S.C.; Feltzing, S.; Verheijen, M.A.W.; Jarvis, M.J.; Percival, W.; Abrams, D.C.; Agocs, T.; Brown, A.G.A.; Cano, D.; Evans, C.R.; Helmi, A.; Lewis, I.J.; McLure, R.J.; Peletier, R.F.; Perez-Fournon, I.; Sharples, R.; Tosh, I.A.J.; Trujillo, I.; Walton, N.A.; Westfall, K.B. (2010)
      Wide-field multi-object spectroscopy is a high priority for European astronomy over the next decade. Most 8-10m telescopes have a small field of view, making 4-m class telescopes a particularly attractive option for ...