Astrophysical: Quasars

  • Publication
    Quasar H-beta profiles and discs
    High signal-to-noise spectra of the H-beta region of eight radio-loud quasars are presented in an investigation seeking evidence for the emission of this line...
  • Publication
    Quasars as a Tracer of Large-scale Structures in the Distant Universe
    We study the dependence of the number density and properties of quasars on the background galaxy density using the currently largest spectroscopic data sets of...
  • Publication
    Quasars Do Not Live in Merging Systems: No Enhanced Merger Rate at z≲0.8
    We tackle the long-standing question “what is the relevance of major mergers and interactions as triggering mechanisms for AGN activity?” We study a sample of...
  • Publication
    Quasars in the OTELO survey
    OTELO is a survey of emission line objects that will be carried out using tunable filters with OSIRIS at the GTC. The survey will have a deep impact on...
  • Publication
    Quasars with flare/eclipse-like variability identified in ZTF
    Active galactic nuclei (AGNs) are known to exhibit optical/ultraviolet variability and most of them can be well modelled by the damped random walks. Physical...
  • Publication
    Quasars with P v broad absorption in BOSS data release 9
    Broad absorption lines (BALs) found in a significant fraction of quasar spectra identify high-velocity outflows that might be present in all quasars and could...
  • Talk
    Quasars: triggering and feedback
    There is increasing speculation that quasars are intimately linked to the evolution of their host galaxies. Not only are they triggered as galaxies build up...
  • Publication
    Quasi-stellar objects in the ALHAMBRA survey. I. Photometric redshift accuracy based on 23 optical-NIR filter photometry
    Context. Even the spectroscopic capabilities of today's ground and space-based observatories can not keep up with the enormous flow of detections (>105 deg-2)...
  • Publication
    Radio jets in NGC 4151: where eMERLIN meets HST
    We present high-sensitivity eMERLIN radio images of the Seyfert galaxy NGC 4151 at 1.51 GHz. We compare the new eMERLIN images to those from archival MERLIN...