Publications (30)
Evidence of a discontinuous disk structure around the Herbig Ae star HD 139 614
Alexis Matter, Lucas Labadie, Alexander Kreplin +6
A new class of pre-main sequence objects has been recently identified as pre-transitional disks. They present near-infrared excess coupled to a flux deficit at about 10 microns and…
Evidence for an accretion bridge in the DX Cha circumbinary system from VLTI/MATISSE observations
TÃmea Juhász, József Varga, Péter Ãbrahám +20
DX Cha (HD 104237) is a spectroscopic binary consisting of a Herbig A7.5Ve-A8Ve primary star and a K3-type companion. Here we report on new micrometer interferometric observ…
Why Chromatic Imaging Matters
Joel Sanchez-Bermudez, Florentin Millour, Fabien Baron +15
During the last two decades, the first generation of beam combiners at the Very Large Telescope Interferometer has proved the importance of optical interferometry for high-angular…
The spatial extent of Polycyclic Aromatic Hydrocarbons emission in the Herbig star HD 179218
Anas S. Taha, Lucas Labadie, Eric Pantin +7
We investigate in the mid-IR the spatial properties of the PAHs emission in the disk of HD179218. We obtained mid-IR images in the PAH1, PAH2 and Si6 filters at 8.6, 11.3 and 12.5…
Destructuring the disk of AB Aurigae: Dynamics and accretion
Anthony Boccaletti, Emmanuel Di Folco, Anne Dutrey +23
In this paper, we present near-IR polarized images of the AB Aur disk at three epochs spanning 3.85 years with SPHERE/IRDIS, as well as Halpha images obtained with SPHERE/ZIMPOL at…
L-band nulling interferometry at the VLTI with Asgard/Hi-5: status and plans
Denis Defrère, Azzurra Bigioli, Colin Dandumont +34
Hi-5 is the L'-band (3.5-4.0 m) high-contrast imager of Asgard, an instrument suite in preparation for the visitor focus of the VLTI. The system is optimized for high-contrast…
HD139614: the interferometric case for a group-Ib pre-transitional young disk
Lucas Labadie, Alexis Matter, Alexander Kreplin +7
The Herbig Ae star HD 139614 is a group-Ib object, which featureless SED indicates disk flaring and a possible pre-transitional evolutionary stage. We present mid- and near-IR inte…
Thermal imaging of dust hiding the black hole in the Active Galaxy NGC 1068
Violeta Gamez Rosas, Jacob W. Isbell, Walter Jaffe +49
In the widely accepted 'Unified Model' solution of the classification puzzle of Active Galactic Nuclei, the orientation of a dusty accretion torus around the central black hole dom…
Bridging stellar evolution and planet formation: from birth, to survivors of the fittest, to the second generation of planets
Akke Corporaal, Toon De Prins, Léa Planquart +10
Stars and planets form, live, and evolve in unison. Throughout the life of a star, dusty circumstellar discs and stellar outflows influence the further evolution of both the star(s…
Parasitic Interference in Long Baseline Optical Interferometry: Requirements for Hot Jupiter-like Planet Detection
Alexis Matter, Bruno Lopez, Stéphane Lagarde +4
The observable quantities in optical interferometry, which are the modulus and the phase of the complex visibility, may be corrupted by parasitic fringes superimposed on the genuin…
Asgard/NOTT: water vapor and CO atmospheric dispersion compensation system
Romain Laugier, Denis Defrère, Michael Ireland +8
To leverage the angular resolution of interferometry at high contrast, one must employ specialized beam-combiners called interferometric nullers. Nullers discard part of the astrop…
Hot exozodiacal dust around Fomalhaut: The MATISSE perspective
Kevin Ollmann, Florian Kirchschlager, Thomas A. Stuber +6
Excess over the stellar photospheric emission of main-sequence stars has been found in interferometric near-infrared observations, and is attributed to the presence of hot exozodia…
On the inner disk structure of MWC480: evidence for asymmetries?
Narges Jamialahmadi, Bruno Lopez, Philippe Berio +7
Studying the physical conditions structuring the young circumstellar disks is required for understanding the onset of planet formation. Of particular interest is the protoplanetary…
Asgard/NOTT: L-band nulling interferometry at the VLTI I. Simulating the expected high-contrast performance
Romain Laugier, Denis Defrère, Benjamin Courtney-Barrer +13
Context: NOTT (formerly Hi-5) is a new high-contrast L' band (3.5-4.0 \textmu m) beam combiner for the VLTI with the ambitious goal to be sensitive to young giant exoplanets down t…
Determination of physical properties of the asteroid (41) Daphne from interferometric observations in the thermal infrared
Alexis Matter, Marco Delbo, Sebastiano Ligori +2
We describe interferometric observations of the asteroid (41) Daphne in the thermal infrared obtained with the Mid-Infrared Interferometric Instrument (MIDI) of the Very Large Tele…
Modelling of mid-infrared interferometric signature of hot exozodiacal dust emission
Florian Kirchschlager, Sebastian Wolf, Robert Brunngräber +3
Hot exozodiacal dust emission was detected in recent surveys around two dozen main sequence stars at distances of less than using H and K band interferometry. Due to…
Evidence of a metal-rich surface for the asteroid (16) Psyche from interferometric observations in the thermal infrared
Alexis Matter, Marco Delbo, Benoit Carry +1
We describe the first determination of thermal properties and size of the M-type asteroid (16) Psyche from interferometric observations obtained with the Mid-Infrared Interferometr…
Chromatically modelling the parsec scale dusty structure in the centre of NGC1068
James Leftley, Romain Petrov, Niklas Moszczynski +19
The Very Large Telescope Interferometer (VLTI) has been providing breakthrough images of the dust in the central parsecs of Active Galactic Nuclei (AGN), a key component of the AGN…
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…
A catalogue of high angular resolution and contrast polarimetric maps of 45 nearby AGB stars with SPHERE/ZIMPOL
Nekolgne Aymard Badolo, Eric Lagadec, Mamadou N'Diaye +7
We present the largest catalogue of asymptotic giant branch (AGB) stars, 45 targets in total, observed in polarized light at high angular resolution (~ 20 milliarcsec). The main go…
First L band detection of hot exozodiacal dust with VLTI/MATISSE
Florian Kirchschlager, Steve Ertel, Sebastian Wolf +2
For the first time we observed the emission of hot exozodiacal dust in L band. We used the new instrument MATISSE at the Very Large Telescope Interferometer to detect the hot dust…
Calculation of the enrichment of the giant planet envelopes during the "late heavy bombardment"
Alexis Matter, Tristan Guillot, Alessandro Morbidelli
The giant planets of our solar system possess envelopes consisting mainly of hydrogen and helium but are also significantly enriched in heavier elements relatively to our Sun. In o…
Planet Formation Imager (PFI): science vision and key requirements
Stefan Kraus, John D. Monnier, Michael J. Ireland +75
The Planet Formation Imager (PFI) project aims to provide a strong scientific vision for ground-based optical astronomy beyond the upcoming generation of Extremely Large Telescopes…
The dusty heart of Circinus: I. Imaging the circumnuclear dust in N-band
Jacob W. Isbell, Klaus Meisenheimer, Jörg-Uwe Pott +28
Active galactic nuclei play a key role in the evolution of galaxies, but their inner workings and physical connection to the host are poorly understood due to a lack of angular res…
STARSFLUX: an all-sky catalogue of absolute spectro-photometric calibrators from 0.3 to 30 m
Violeta Gámez Rosas, Michiel Hogerheijde, Roy van Boekel +10
The paper introduces STARSFLUX, an all‑sky catalogue of over 64,000 absolute spectro‑photometric calibrator spectra from 0.3 to 30 µm, derived by fitting Gaia DR3 stellar parameter…
Spatially resolving polycyclic aromatic hydrocarbons in Herbig Ae disks with VISIR-NEAR at the VLT
Gideon Yoffe, Roy van Boekel, Aigen Li +15
We use the long-slit spectroscopy mode of the VISIR-NEAR experiment to perform diffraction-limited observations of eight nearby Herbig Ae protoplanetary disks. We extract spectra f…
Parasitic interference in nulling interferometry
Alexis Matter, Denis Defrère, William C. Danchi +2
Nulling interferometry aims to detect faint objects close to bright stars. Its principle is to produce a destructive interference along the line-of-sight so that the stellar flux i…
Reconstructing the mid-infrared environment in the stellar merger remnant V838 Monocerotis
Muhammad Zain Mobeen, Tomasz KamiÅski, Alexis Matter +15
V838 Mon is a stellar merger remnant that erupted in 2002 in a luminous red novae event. Although it is well studied in the optical, near infrared and submillimeter regimes, its st…
Variable warm dust around the Herbig Ae star HD~169142: Birth of a ring?
Lei Chen, Attila Moor, Alexander Kreplin +7
The Herbig Ae star HD 169142 is known to have a gaseous disk with a large inner hole, and also a photometrically variable inner dust component in the sub-au region. Following up ou…
The mid-infrared environment of the stellar merger remnant V838 Monocerotis
Muhammad Zain Mobeen, Tomasz KamiÅski, Alexis Matter +2
In 2002, V838 Monocerotis (V838 Mon) erupted in a red novae event which has been interpreted to be a stellar merger. Soon after reaching peak luminosity, it began to cool, and its…