Publications (12)
Impact of water vapor seeing on mid-infrared high-contrast imaging at ELT scale
Olivier Absil, Christian Delacroix, Gilles Orban de Xivry +9
The high-speed variability of the local water vapor content in the Earth atmosphere is a significant contributor to ground-based wavefront quality throughout the infrared domain. U…
Constraints on the nearby exoplanet Ind Ab from deep near/mid-infrared imaging limits
Gayathri Viswanath, Markus Janson, Carl-Henrik Dahlqvist +16
The past decade has seen increasing efforts in detecting and characterising exoplanets by high contrast imaging in the near/mid-infrared, which is the optimal wavelength domain for…
ALF: an asymmetric Lyot wavefront sensor for the ELT/METIS vortex coronagraph
Gilles Orban de Xivry, Olivier Absil, Christian Delacroix +3
Non-common path quasi-static and differential aberrations are one of the big hurdles of direct imaging for current and future high-contrast imaging instruments. They increase speck…
SCExAO, an instrument with a dual purpose: perform cutting-edge science and develop new technologies
Julien Lozi, Olivier Guyon, Nemanja Jovanovic +31
The Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) instrument is an extremely modular high-contrast instrument installed on the Subaru telescope in Hawaii. SCExAO has a dual…
METIS high-contrast imaging: from final design to manufacturing and testing
Olivier Absil, Matthew Kenworthy, Christian Delacroix +21
The Mid-infrared ELT Imager and Spectrograph (METIS) is one of the first-generation scientific instruments for the ELT, built under the supervision of ESO by a consortium of resear…
Maximising the mid-infrared high-contrast performance of ELT/METIS despite water vapour seeing
Olivier Absil, Gilles Orban de Xivry, Prashant Pathak +7
The Mid-infrared ELT Imager and Spectrograph (METIS) will be equipped with a SCAO system delivering Strehl ratios above 90% at L band (3.5 - 4.1 um) and close to 99% at N band (8 -…
Lessons learned from the NEAR experiment and prospects for the upcoming mid-IR HCI instruments
Prashant Pathak, Markus Kasper, Olivier Absil +6
The mid-infrared (IR) regime is well suited to directly detect the thermal signatures of exoplanets in our solar neighborhood. The NEAR experiment: demonstration of high-contrast i…
Artificial incoherent speckles enable precision astrometry and photometry in high-contrast imaging
Nemanja Jovanovic, Olivier Guyon, Frantz Martinache +3
State-of-the-art coronagraphs employed on extreme adaptive optics enabled instruments, are constantly improving the contrast detection limit for companions at ever closer separatio…
High contrast imaging with ELT/METIS: The wind driven halo, from SPHERE to METIS
Faustine Cantalloube, Olivier Absil, Thomas Bertram +13
METIS is one of the three first-light instruments planned for the ELT, mainly dedicated to high contrast imaging in the mid-infrared. On the SPHERE high-contrast instrument current…
On-sky closed loop correction of atmospheric dispersion for high-contrast coronagraphy and astrometry
Prashant Pathak, Olivier Guyon, Nemanja Jovanovic +6
Adaptive optic (AO) systems delivering high levels of wavefront correction are now common at observatories. One of the main limitations to image quality after wavefront correction…
VLT/ERIS observations of the V960 Mon system: a dust-embedded substellar object formed by gravitational instability?
Anuroop Dasgupta, Alice Zurlo, Philipp Weber +8
V960~Mon is an FU Orionis object that shows strong evidence of a gravitationally unstable spiral arm that is fragmenting into several dust clumps. We report the discovery of a new…
PCS -- A Roadmap for Exoearth Imaging with the ELT
Markus Kasper, Nelly Cerpa Urra, Prashant Pathak +22
The Planetary Camera and Spectrograph (PCS) for the Extremely Large Telescope (ELT) will be dedicated to detecting and characterising nearby exoplanets with sizes from sub-Neptune…