Astrophysical: Quasars

  • Publication
    Chandra Observations of the X-Ray Jet of 3C 273
    We report results from Chandra observations of the X-ray jet of 3C 273 during the calibration phase in 2000 January. The zeroth-order images and spectra from...
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    Circumgalactic medium of quasars: C IV absorption systems
    We investigate the properties of circumgalactic gas in the halo of quasar (QSO) host galaxies from C IV absorption-line systems. We use the optical spectroscopy...
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    Clear evidence for the early triggering of a luminous quasar-like active galactic nuclei in a major, gas-rich merger
    We present deep, intermediate resolution, long-slit Gemini GMOS-S optical spectra of the Sloan Digital Sky Survey (SDSS) type II quasar J002531-104022, which is...
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    Clustering of intermediate redshift quasars using the final SDSS III-BOSS sample
    We measure the two-point clustering of spectroscopically confirmed quasars from the final sample of the Baryon Oscillation Spectroscopic Survey (BOSS) on...
  • Publication
    Clustering of intermediate redshift quasars using the final SDSS III-BOSS sample
    We measure the two-point clustering of spectroscopically confirmed quasars from the final sample of the Baryon Oscillation Spectroscopic Survey (BOSS) on...
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    Coevolution of supermassive black holes and their host galaxies
    Accretion onto a supermassive black hole (BH) is the most viable explanation for the huge emitted luminosity in active galaxies. Nowadays a wealth of...
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    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...
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    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...
  • Publication
    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...