Astrophysical: Quasars

  • Publication
    Multiwavelength study of the gravitationally lensed blazar QSO B0218+357 between 2016 and 2020
    We report multiwavelength observations of the gravitationally lensed blazar QSO B0218+357 in 2016-2020. Optical, X-ray, and GeV flares were detected. The...
  • Publication
    MUSE view of PDS 456: Kiloparsec-scale wind, extended ionized gas, and close environment
    PDS 456 is the most luminous (L bol ∼ 10 47 erg s −1) radio-quiet quasar at z < 0.3 and can be regarded as a local counterpart of the powerful quasars shining...
  • Publication
    MUSEQuBES: calibrating the redshifts of Ly α emitters using stacked circumgalactic medium absorption profiles
    Ly α emission lines are typically found to be redshifted with respect to the systemic redshifts of galaxies, likely due to resonant scattering of Ly α photons...
  • Publication
    Narrow band imaging and long slit spectroscopy of UGC 5101
    UGC 5101 (z = 0.04; D is approximately equal to 240 Mpc) is one of the so called Ultraluminous IRAS sources. Two important properties of the members of this...
  • Publication
    Near-Infrared Adaptive Optics Imaging of High-Redshift Quasars
    The properties of high-redshift quasar host galaxies are studied in order to investigate the connection between galaxy evolution, nuclear activity, and the...
  • Publication
    Near-infrared imaging of the host galaxies of flat spectrum radio quasars
    We present the results of a high resolution (0.27'' px(-1) ) near-infrared H band (1.65 μm) imaging survey of a complete sample of 20 flat spectrum radio...
  • Publication
    Near-infrared photometry of high redshift quasars
    NIR (JHK) photometry of six quasars with redshifts ranging from 3 to 3.78 is reported. None of these objects has previously been observed in the IR. Their NIR...
  • Talk
    Negative feedback in the most powerful active galaxies - NO STREAMING -
    Evidence for an intimate connection between supermassive black hole (SMBH) growth and the evolution of galaxies is nowadays compelling. Not only have SMBHs been...
  • Publication
    New database for a sample of optically bright lensed quasars in the northern hemisphere
    In the framework of the Gravitational LENses and DArk MAtter (GLENDAMA) project, we present a database of nine gravitationally lensed quasars (GLQs) that have...