Astrofísicas: Cuásares

  • Publicación
    Compact radio-loud Broad Absorption Line Quasars .
    For a long time, radio-loud Broad Absorption Line Quasars (BAL QSOs) were thought to be extremely rare objects. The absorbing troughs seen in their optical...
  • Publicación
    Complex AGN feedback in the Teacup galaxy. A powerful ionised galactic outflow, jet-ISM interaction, and evidence for AGN-triggered star formation in a giant bubble
    Context. The z ∼ 0.1 type-2 QSO J1430+1339, known as the " Teacup", is a complex galaxy showing a loop of ionised gas ∼10 kpc in diameter, co-spatial radio...
  • Publicación
    Constraining the Epoch of Reionization from the Observed Properties of the High-z Universe
    We combine observational data on a dozen independent cosmic properties at high-z with the information on reionization drawn from the spectra of distant luminous...
  • Publicación
    Constraining the nature of high frequency peakers. II. Polarization properties
    Aims:The “bright” High Frequency Peakers (HFPs) sample is a mixture of blazars and intrinsically small and young radio sources. We investigate the polarimetric...
  • Publicación
    Constraint on the time variation of the fine-structure constant with the SDSS-III/BOSS DR12 quasar sample
    From the Sloan Digital Sky Survey (SDSS) Data Release 12, which covers the full Baryonic Oscillation Spectroscopic Survey (BOSS) footprint, we investigate the...
  • Publicación
    Cross-correlation of SDSS DR7 Quasars and DR10 BOSS Galaxies: The Weak Luminosity Dependence of Quasar Clustering at z ~ 0.5
    We present the measurement of the two-point cross-correlation function (CCF) of 8198 Sloan Digital Sky Survey Data Release 7 quasars and 349,608 Data Release 10...
  • Publicación
    Dark Matter Mass Fraction in Lens Galaxies: New Estimates from Microlensing
    We present a joint estimate of the stellar/dark matter mass fraction in lens galaxies and the average size of the accretion disk of lensed quasars based on...
  • Noticia
    Datos infrarrojos del telescopio James Webb revelan una inesperada diversidad en cuásares oscurecidos
    Un equipo internacional liderado por Cristina Ramos Almeida, investigadora del Instituto de Astrofísica de Canarias (IAC), ha utilizado el Telescopio Espacial...
  • Publicación
    Deciphering Quasar Millilensing How to Distinguish Between Dark and Luminous Lenses
    Dwarf-galaxy sized dark matter halos may be detectable when a bright background source is gravitationally lensed on scales of milliarcseconds. Such effects can...