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13 papers · 2 filters
Gaia GraL: Gaia DR2 Gravitational Lens Systems. V. Doubly-imaged QSOs discovered from entropy and wavelets
A. Krone-Martins, M. J. Graham, D. Stern +22
The discovery of multiply-imaged gravitationally lensed QSOs is fundamental to many astronomical and cosmological studies. However, these objects are rare and challenging to discov…
LLAMA: The - Relation of the most luminous local AGNs
Turgay Caglar, Leonard Burtscher, Bernhard Brand +17
The - relation is considered a result of co-evolution between the host galaxies and their super-massive black holes. For elliptical-bulge hosting inactive gala…
Spatially separated continuum sources revealed by microlensing in the gravitationally lensed broad absorption line quasar SDSSJ081830.46+060138.0
D. Hutsemékers, D. Sluse, P. Kumar
Gravitational microlensing is a powerful tool for probing the inner structure of distant quasars. In this context, we have obtained spectropolarimetric observations of the two imag…
Lessons from a blind study of simulated lenses: image reconstructions do not always reproduce true convergence
Philipp Denzel, Sampath Mukherjee, Jonathan P. Coles +1
In the coming years, strong gravitational lens discoveries are expected to increase in frequency by two orders of magnitude. Lens-modelling techniques are being developed to prepar…
New active galactic nuclei science cases with interferometry: An incomplete preview
Sebastian F. Hönig, Almudena Alonso Herrero, Poshak Gandhi +4
Infrared (IR) interferometry has made widely recognised contributions to the way we look at the dusty environment of supermassive black holes on parsec scales. It finally provided…
Constraining the geometry and kinematics of the quasar broad emission line region using gravitational microlensing. II. Comparing models with observations in the lensed quasar HE0435-1223
D. Hutsemékers, L. Braibant, D. Sluse +1
The quadruply lensed quasar HE0435-1223 shows a clear microlensing effect that affects differently the blue and red wings of the H line profile in its image D. To interpret thes…