Astrophysical: Quasars

  • Publication
    The Cosmic Evolution of Quasar Host Galaxies
    We present the results of a near-infrared imaging study of the host galaxies of 17 quasars in the redshift range 1 RLQ(host)=-27.55+/-0.12 and K>RLQ(host)=-26...
  • Publication
    The curious activity in the nucleus of NGC 4151: jet interaction causing variability?
    A key characteristic of many active galactic nuclei (AGNs) is their variability, but its origin is poorly understood, especially in the radio domain. Williams...
  • Publication
    The demographics of obscured AGN from X-ray spectroscopy guided by multiwavelength information
    A complete census of active galactic nuclei (AGNs) is a prerequisite for understanding the growth of supermassive black holes across cosmic time. A significant...
  • Publication
    The DESI Survey Validation: Results from Visual Inspection of the Quasar Survey Spectra
    A key component of the Dark Energy Spectroscopic Instrument (DESI) survey validation (SV) is a detailed visual inspection (VI) of the optical spectroscopic data...
  • Publication
    The diverse cold molecular gas contents, morphologies, and kinematics of type-2 quasars as seen by ALMA
    We present CO(2−1) and adjacent continuum observations of seven nearby radio-quiet type-2 quasars (QSO2s) obtained with ALMA at ∼0.2″ resolution (370 pc at z ∼...
  • Publication
    The dust masses of powerful radio galaxies: clues to the triggering of their activity
    We use deep Herschel Space Observatory observations of a 90 per cent complete sample of 32 intermediate-redshift 2Jy radio galaxies (0.05 z 0.7) with strong...
  • Publication
    The dusty tori of nearby QSOs as constrained by high-resolution mid-IR observations
    We present mid-infrared (MIR; 7.5-13.5 μm) imaging and spectroscopy observations obtained with the CanariCam (CC) instrument on the 10.4-m Gran Telescopio...
  • Talk
    The ESO VISTA telescope and the VISTA Hemisphere Survey
    Survey operations with the VISTA telescope with it wide field near IR camera started in Feb 2010, following a science verification phase that started in Oct...
  • Publication
    The European Large Area ISO Survey - VI. Discovery of a new hyperluminous infrared galaxy
    We report the discovery of the first hyperluminous infrared galaxy (HyLIG) in the course of the European Large Area ISO Survey (ELAIS). This object has been...