Astrophysical: Quasars

  • Publication
    Dust Reverberation Mapping in Distant Quasars from Optical and Mid-infrared Imaging Surveys
    The size of the dust torus in active galactic nuclei (AGNs) and their high-luminosity counterparts, quasars, can be inferred from the time delay between UV...
  • Publication
    Eight more ultra luminous X-ray candidates unmasked
    Aims:We aim to identify the nature of several objects previously catalogued as ultra-luminous X-ray (ULX) source candidates. Methods: Long-slit spectroscopy of...
  • News
    Einstein’s Principle of Equivalence verified in quasars for the first time
    According to Einstein’s theory of general relativity gravity affects light as well as matter. One consequence of this theory, based on the Principle of...
  • Publication
    Electron-beam interaction with emission-line clouds in blazars
    Context. An electron-positron beam escaping from the magnetospheric vacuum gap of an accreting black hole interacts with recombination-line photons from...
  • Publication
    Environments of nearby quasars in Sloan Digital Sky Survey
    Context: For the first time, spectroscopic galaxy redshift surveys are enabling galaxies to be studied with the nearest quasars. This allows the dependence of...
  • Publication
    Erratum: A novel black hole mass scaling relation based on coronal gas, and its dependence with the accretion disc
  • Publication
    Erratum: VLA and ALMA observations of the lensed radio-quiet quasar SDSS J0924+0219: a molecular structure in a 3 µJy radio source
  • Publication
    Estimate of the Accretion Disk Size in the Gravitationally Lensed Quasar HE 0435–1223 Using Microlensing Magnification Statistics
    We present a measurement of the accretion disk size of the quadruple lensed quasar HE 0435–1223 from well-sampled 13-year COSMOGRAIL optical light curves. Using...
  • Publication
    Euclid preparation. V. Predicted yield of redshift 7 < z < 9 quasars from the wide survey
    We provide predictions of the yield of 7 < z < 9 quasars from the Euclid wide survey, updating the calculation presented in the Euclid Red Book in several ways...