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12 papers · 2 filters
XXL Survey XXI. The environment and clustering of X-ray AGN in the XXL-South field
O. Melnyk, A. Elyiv, V. Smolcic +16
This work is part of a series of studies focusing on the environment and the properties of the X-ray selected active galactic nuclei (AGN) population from the XXL survey. The prese…
LLAMA: Normal star formation efficiencies of molecular gas in the centres of luminous Seyfert galaxies
D. J. Rosario, L. Burtscher, R. I. Davies +23
Using new APEX and JCMT spectroscopy of the CO 2-1 line, we undertake a controlled study of cold molecular gas in moderately luminous Active Galactic Nuclei (AGN) and inactive gala…
LLAMA: Nuclear stellar properties of Swift BAT AGN and matched inactive galaxies
Ming-Yi Lin, R. I. Davies, E. K. S. Hicks +20
In a complete sample of local 14-195 keV selected AGNs and inactive galaxies, matched by their host galaxy properties, we study the spatially resolved stellar kinematics and lumino…
Determination of astrophysical parameters of quasars within the Gaia mission
L. Delchambre
We describe methods designed to determine the astrophysical parameters of quasars based on spectra coming from the red and blue spectrophotometers of the Gaia satellite. These meth…
New constraints on quasar broad absorption and emission line regions from gravitational microlensing
Damien Hutsemékers, Lorraine Braibant, Dominique Sluse +2
Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emi…
Optical linear polarization measurements of quasars obtained with the 3.6m telescope at the La Silla Observatory
D. Hutsemékers, P. Hall, D. Sluse
We report 192 previously unpublished optical linear polarization measurements of quasars obtained in April 2003, April 2007, and October 2007 with the European Southern Observatory…