Now showing items 1-6 of 6

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

    Lehmer, B. D.; Alexander, D. M.; Geach, J. E.; Smail, Ian; Basu-Zych, A.; Bauer, F. E.; Chapman, S. C.; Matsuda, Y.; Scharf, C. A.; Volonteri, M.; Yamada, T. (2009-01-20)
    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 = ...
  • The Chandra Deep Protocluster Survey: Lyα Blobs are powered by heating, not cooling 

    Geach, J. E.; Alexander, D. M.; Lehmer, B. D.; Smail, Ian; Matsuda, Y.; Chapman, S. C.; Scharf, C. A.; Ivison, R. J.; Volonteri, M.; Yamada, T.; Blain, A. W.; Bower, R. G.; Bauer, F. E.; Basu-Zych, A. (2009-07-20)
    We present the results of a 400ks Chandra survey of 29 extended Ly-alpha emitting nebulae (Ly-alpha Blobs, LABs) in the z=3.09 proto-cluster in the SSA22 field. We detect luminous X-ray counterparts in five LABs, implying ...
  • The Chandra Deep Protocluster Survey: Point-Source Catalogs for a 400 ks Observation of the z = 3.09 Protocluster in SSA22 

    Lehmer, B. D.; Alexander, D. M.; Chapman, S. C.; Smail, Ian; Bauer, F. E.; Brandt, W. N.; Geach, J. E.; Matsuda, Y.; Mullaney, J. R.; Swinbank, A. M. (2009-07-24)
    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 ...
  • Energetic galaxy-wide outflows in high-redshift ultra-luminous infrared galaxies hosting AGN activity 

    Harrison, C. M.; Alexander, D. M.; Swinbank, A. M.; Smail, Ian; Alaghband-Zadeh, S.; Bauer, F. E.; Chapman, S. C.; Del Moro, A.; Hickox, R. C.; Ivison, R. J.; Menendez-Delmestre, Karin; Mullaney, J. R.; Nesvadba, N. P. H. (2012-05-08)
    We present integral field spectroscopy observations, covering the [O III]4959,5007 emission-line doublet of eight high-redshift (z=1.4-3.4) ultra-luminous infrared galaxies (ULIRGs) that host Active Galactic Nuclei (AGN) ...
  • Weighing the Black Holes in z~2 Submillimeter-Emitting Galaxies Hosting Active Galactic Nuclei 

    Alexander, D. M.; Brandt, W. N.; Smail, I.; Swinbank, A. M.; Bauer, F. E.; Blain, A. W.; Chapman, S. C.; Coppin, K. E. K.; Ivison, R. J.; Menendez-Delmestre, K. (2008-05-01)
    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 ...
  • The X-ray Spectral Properties of SCUBA Galaxies 

    Alexander, D. M.; Bauer, F. E.; Chapman, S. C.; Smail, I.; Blain, A. W.; Brandt, W. N.; Ivison, R. J. (2005-10-20)
    Deep SCUBA surveys have uncovered a large population of massive submm galaxies (SMGs) at z>~1. Although it is generally believed that these galaxies host intense star-formation activity, there is growing evidence that a ...