153 citations · 771 across the 19 of their papers we have counts for
19 papers
Mid-IR Water-Vapor Seeing: Implications for ELT/METIS High-Contrast Imaging from VLTI Data
Abhirami S Raghu, Prashant Pathak, Olivier Absil +7
Direct imaging and characterization of rocky exoplanets remains one of the central challenges in exoplanetary science. The mid-infrared (mid-IR) offers a favorable high-contrast im…
Exploring reinforcement learning to enhance focal-plane wavefront control for vortex coronagraphs
Iremsu Taskin, Jalo Nousiainen, Gilles Orban de Xivry +2
High Contrast Imaging (HCI) on ground-based telescopes suffers from phase aberrations on the observed wavefront caused by atmospheric turbulence. Adaptive Optics (AO) systems are a…
Towards Autodifferentiable Point Spread Function Modelling for the VLT/ERIS Vortex Coronagraph
P. Van de Walle Suarez, G. Orban De Xivry, O. Absil +3
High-contrast imaging of exoplanets is limited by the presence of quasi-static speckles and existing post-processing methods remain above the theoretical noise limit. We investigat…
Vector Apodizing Phase Plates for the ELT: From prototype to final optics for METIS and MICADO
J. A. van den Born, R. Landman, D. S. Doelman +12
The first generation of instruments for the upcoming Extremely Large Telescope (ELT) will allow for the direct imaging of exoplanets that were previously below the sensitivity or r…
Focal plane wavefront control with model-based reinforcement learning
Jalo Nousiainen, Iremsu Taskin, Markus Kasper +2
The direct imaging of potentially habitable exoplanets is one prime science case for high-contrast imaging instruments on extremely large telescopes. Most such exoplanets orbit clo…
The Enhanced Resolution Imager and Spectrograph for the VLT
R. Davies, O. Absil, G. Agapito +81
ERIS, the Enhanced Resolution Imager and Spectrograph, is an instrument that both extends and enhances the fundamental diffraction limited imaging and spectroscopy capability for t…
First on-sky results of ERIS at VLT
Kateryna Kravchenko, Yigit Dallilar, Olivier Absil +46
ERIS (Enhanced Resolution Imager and Spectrograph) is a new adaptive optics instrument installed at the Cassegrain focus of the VLT-UT4 telescope at the Paranal Observatory in Chil…
Resolving the Host Galaxy of a Distant Blazar with LBT/LUCI1 + ARGOS
Emanuele Paolo Farina, Iskren Y. Georgiev, Roberto Decarli +14
BL Lac objects emitting in the Very High Energy (VHE) regime are unique tools to peer into the properties of the Extragalactic Background Light (EBL). However, due to the typical a…
The path towards high-contrast imaging with the VLTI: the Hi-5 project
D. Defrère, O. Absil, J. -P. Berger +26
The development of high-contrast capabilities has long been recognized as one of the top priorities for the VLTI. As of today, the VLTI routinely achieves contrasts of a few 10$^{-…
Discovery of a point-like source and a third spiral arm in the transition disk around the Herbig Ae star MWC 758
M. Reggiani, V. Christiaens, O. Absil +20
Transition disks offer the extraordinary opportunity to look for newly born planets and investigate the early stages of planet formation. In this context we observed the Herbig A5…
The Role of Host Galaxy for the Environmental Dependence of Active Nuclei in Local Galaxies
R. I. Davies, E. K. S. Hicks, P. Erwin +22
We discuss the environment of local hard X-ray selected active galaxies, with reference to two independent group catalogues. We find that the fraction of these AGN in S0 host galax…
Constraints on the Broad Line Region Properties and Extinction in Local Seyferts
Allan Schnorr-Müller, R. I. Davies, K. T. Korista +22
We use high spectral resolution (R > 8000) data covering 3800-13000Å to study the physical conditions of the broad line region (BLR) of nine nearby Seyfert 1 galaxies. Up to six br…
On the relation of optical obscuration and X-ray absorption in Seyfert galaxies
L. Burtscher, R. I. Davies, J. Gracia-Carpio +15
The optical classification of a Seyfert galaxy and whether it is considered X-ray absorbed are often used interchangeably. But there are many borderline cases and also numerous exa…
Fueling AGN II: Spatially Resolved Molecular Inflows and Outflows
R. I. Davies, W. Maciejewski, E. K. S. Hicks +11
We analyse the 2-dimensional distribution and kinematics of the stars as well as molecular and ionised gas in the central few hundred parsecs of 5 active and 5 matched inactive gal…
Physical properties of dense molecular gas in centres of Seyfert galaxies
E. Sani, R. I. Davies, A. Sternberg +10
We present new ~1" resolution data of the dense molecular gas in the central 50-100 pc of four nearby Seyfert galaxies. PdBI observations of HCN and, in 2 of the 4 sources, simulta…
Spatially resolved kinematics of the central regions of M83: hidden mass signatures and the role of supernovae
J. Piqueras López, R. Davies, L. Colina +1
The barred grand-design spiral M83 (NGC 5236) is one of the most studied galaxies given its proximity, orientation, and particular complexity. Nonetheless, many aspects of the cent…
Do stellar winds play a decisive role in feeding AGN?
R. Davies, L. Burtscher, K. Dodds-Eden +1
While the existence of a starburst-AGN connection is undisputed, there is no consensus on what the connection is. In this contribution, we begin by noting that the mechanisms which…
The Role of Secular Evolution in the Black Hole Growth of Narrow-Line Seyfert 1 Galaxies
G. Orban de Xivry, R. Davies, M. Schartmann +5
Narrow-Line Seyfert 1 (NLS1) galaxies show extreme properties with respect to the other Seyfert galaxies. Indeed, they are thought to be accreting at Eddington rates and to possess…
An Atlas of Predicted Exotic Gravitational Lenses
Gilles Orban de Xivry, Phil Marshall
Wide-field optical imaging surveys will contain tens of thousands of new strong gravitational lenses. Some of these will have new and unusual image configurations, and so will enab…