Astrophysical: Quasars

  • Publication
    New optical spectra and general discussion on the nature of ULXs
    We present optical spectroscopic observations of three Ultra Luminous X-ray sources (ULXs). Two of them are very close to the active galaxy NGC 720 and the...
  • Publication
    New Quasars Detected via Variability in the QUEST1 Survey
    By observing the high Galactic latitude equatorial sky in drift-scan mode with the QUEST (Quasar Equatorial Survey Team) Phase 1 camera, we have collected...
  • Publication
    New VR Magnification Ratios of QSO 0957+561
    We present VR magnification ratios of QSO 0957+561 that are inferred from the GLITP light curves of Q0957+561A and new frames taken with the 2.56 m Nordic...
  • Publication
    New windows to the universe; Proceedings of the Eleventh IAU European Regional Astronomy Meeting, Universidad de La Laguna, Spain, July 3-8, 1989. Part III
    Topics discussed in this issue include active galaxies and cosmology, interstellar and intergalactic medium, and astronomical instrumentation. Papers are...
  • Publication
    Nitrogen Abundances in Damped Lyalpha Galaxies
    Nitrogen lines of the N I lambda1134 and lambda1200 multiplets in the damped Lyalpha (DLA) galaxies at z_abs = 2.309, 2.827, and 3.025 toward the QSOs 0100+1300...
  • Publication
    No Evolution in the MBH-M*,total Relation Over the Last 9 Gyrs
    We investigate 10 QSO host galaxies at 1
  • Talk
    Non-evolution of black hole mass/luminosity ratio, superluminal motions and other pending problems in QSOs
    1) López-Corredoira & Gutiérrez (2012, RAA, 12, 249): Extremely luminous QSOs exist at high redshift but they are absent at low redshift. Our analyses show that...
  • Publication
    Obscuration beyond the nucleus: infrared quasars can be buried in extreme compact starbursts
    In the standard quasar model, the accretion disc obscuration is due to the canonical dusty torus. Here, we argue that a substantial part of the quasar...
  • Publication
    Observations of the Lensed Quasar Q2237+0305 with CanariCam at GTC
    We present new mid-IR observations of the quadruply lensed quasar Q2237+0305 taken with CanariCam on the Gran Telescopio Canarias. Mid-IR emission by hot dust...