Astrophysical: Quasars

  • Publication
    The ESPRESSO Redshift Drift Experiment: I. High-resolution spectra of the Lyman-α forest of QSO J052915.80-435152.0
    Context. The measurement of the tiny temporal evolution in the redshift of distant objects, the redshift drift, is a powerful probe of universal expansion and...
  • 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...
  • Publication
    The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity function
    The extended Baryon Oscillation Spectroscopic Survey of the Sloan Digital Sky Survey (SDSS-IV/eBOSS) has an extensive quasar program that combines several...
  • Publication
    The extended Baryon Oscillation Spectroscopic Survey: Variability selection and quasar luminosity function (Corrigendum)
    Not Available
  • Publication
    The Extended High A(V) Quasar Survey: Searching for Dusty Absorbers toward Mid-infrared-selected Quasars
    We present the results of a new spectroscopic survey for dusty intervening absorption systems, particularly damped Lyα absorbers (DLAs), toward reddened quasars...
  • Publication
    The extent of the Mg II absorbing circumgalactic medium of quasars
    We investigate the extent and the properties of the Mg II cool, low-density absorbing gas located in the halo and in the circumgalactic environment of quasars...
  • Publication
    The filling factor of intergalactic metals at redshift z= 3
    Observations of quasar absorption-line systems reveal that the z= 3 intergalactic medium (IGM) is polluted by heavy elements down to H I optical depths τH I≪ 10...
  • Publication
    The First Billion Years project: birthplaces of direct collapse black holes
    We investigate the environment in which direct-collapse black holes may form by analysing a cosmological, hydrodynamical simulation that is part of the First...
  • Publication
    The First Identification of Lyα Changing-look Quasars at High Redshift in DESI
    We present two cases of Lyα changing-look (CL) quasars (J1306 and J1512) along with two additional candidates (J1511 and J1602), all discovered serendipitously...