391 citations · 4.6k across the 83 of their papers we have counts for
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Detectability of resolved hydrogen lines from the accretion shock at gas giants and their circumplanetary discs
Gabriel-Dominique Marleau, Thomas Henning, Roy van Boekel +3
Fewer gas giants have been caught in their accretion phase than mature ones are known. Extremely Large Telescope (ELT) instruments will have a higher sensitivity and a smaller inne…
Thermal Emission from the hot Jupiter WASP-103b in J and Ks Bands
Yaqing Shi, Wei Wang, Gang Zhao +8
Hot Jupiters, particularly those with temperature higher than 2000 K are the best sample of planets that allow in-depth characterization of their atmospheres. We present here a the…
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…
Detection of Na and K in the atmosphere of the hot Jupiter HAT-P-1b with P200/DBSP
Guo Chen, Hongchi Wang, Roy van Boekel +1
We present a new optical transmission spectrum of the hot Jupiter HAT-P-1b based on two transits observed with the Double Spectrograph (DBSP) on the Palomar 200-inch (P200) telesco…
Accreting protoplanets: Spectral signatures and magnitude of gas and dust extinction at H alpha
G. -D. Marleau, Y. Aoyama, R. Kuiper +14
Accreting planets have been seen at Ha (H alpha), but targeted searches have not been fruitful. For planets, accretion tracers should come from the shock itself, exposing them to e…
First MATISSE L-band observations of HD 179218. Is the inner 10 au region rich in carbon dust particles?
E. Kokoulina, A. Matter, B. Lopez +58
Carbon is one of the most abundant components in the Universe. While silicates have been the main focus of solid phase studies in protoplanetary discs (PPDs), little is known about…
New Mid-Infrared Imaging Constraints on Companions and Protoplanetary Disks around six Young Stars
D. J. M. Petit dit de la Roche, N. Oberg, M. E. van den Ancker +13
Mid-infrared imaging traces the sub-micron and micron sized dust grains in protoplanetary disks and it offers constraints on the geometrical properties of the disks and potential c…
ISPY -- NACO Imaging Survey for Planets around Young stars: Survey description and results from the first 2.5 years of observations
R. Launhardt, Th. Henning, A. Quirrenbach +21
The occurrence rate of long-period giant planets around young stars is highly uncertain since it is not only governed by the protoplanetary disc structure and planet formation proc…
Shadowing and multiple rings in the protoplanetary disk of HD 139614
G. A. Muro-Arena, M. Benisty, C. Ginski +20
Shadows in scattered light images of protoplanetary disks are a common feature and support the presence of warps or misalignments between disk regions. These warps are possibly due…
Detection of H emission from PZ Tel B using SPHERE/ZIMPOL
Arianna Musso Barcucci, Gabriele Cugno, Ralf Launhardt +7
H is a powerful tracer of accretion and chromospheric activity, which has been detected in the case of young brown dwarfs and even recently in planetary mass companions (e.g. PD…
ISPY -- NaCo Imaging Survey for Planets around Young stars. Discovery of an M dwarf in the gap between HD 193571 and its debris ring
Arianna Musso Barcucci, Ralf Launhardt, Grant M. Kennedy +19
Context. The interaction between low-mass companions and the debris discs they reside in is still not fully understood. A debris disc can evolve due to self-stirring, a process in…
Highly structured disk around the planet host PDS 70 revealed by high-angular resolution observations with ALMA
M. Keppler, R. Teague, J. Bae +19
PDS 70b is the most robustly detected young planet imaged in the gap of a transition disk so far, found at a separation of ~195 mas (~22 au) from its host star and at a position an…
Spectral and orbital characterisation of the directly imaged giant planet HIP 65426 b
A. C. Cheetham, M. Samland, S. S. Brems +38
HIP 65426 b is a recently discovered exoplanet imaged during the course of the SPHERE-SHINE survey. Here we present new and observations of the planet from the NACO instr…
New constraints on the disk characteristics and companion candidates around T Cha with VLT/SPHERE
A. Pohl, E. Sissa, M. Langlois +34
The transition disk around the T Tauri star T Cha possesses a large gap, making it a prime target for high-resolution imaging in the context of planet formation. We aim to find sig…
Spectral and atmospheric characterization of 51 Eridani b using VLT/SPHERE
M. Samland, P. Mollière, M. Bonnefoy +37
51 Eridani b is an exoplanet around a young (20 Myr) nearby (29.4 pc) F0-type star, recently discovered by direct imaging. Being only 0.5" away from its host star it is well suited…
Evolution of protoplanetary disks from their taxonomy in scattered light: Group I vs. Group II
Antonio Garufi, Gwendolyn Meeus, Myriam Benisty +13
High-resolution imaging reveals a large morphological variety of protoplanetary disks. To date, no constraints on their global evolution have been found from this census. An evolut…
Testing giant planet formation in the transitional disk of SAO 206462 using deep VLT/SPHERE imaging
A. -L. Maire, T. Stolker, S. Messina +42
Context. The SAO 206462 (HD 135344B) disk is one of the few known transitional disks showing asymmetric features in scattered light and thermal emission. Near-infrared scattered-li…
Observing transiting planets with JWST -- Prime targets and their synthetic spectral observations
Paul Mollière, Roy van Boekel, Jeroen Bouwman +3
The James Webb Space Telescope will enable astronomers to obtain exoplanet spectra of unprecedented precision. Especially the MIRI instrument may shed light on the nature of the cl…
Shadows and spirals in the protoplanetary disk HD 100453
M. Benisty, T. Stolker, A. Pohl +46
Understanding the diversity of planets requires to study the morphology and the physical conditions in the protoplanetary disks in which they form. We observed and spatially resolv…
The imprint of exoplanet formation history on observable present-day spectra of hot Jupiters
Christoph Mordasini, Roy van Boekel, Paul Mollière +2
The composition of a planet's atmosphere is determined by its formation, evolution, and present-day insolation. A planet's spectrum therefore may hold clues on its origins. We pres…
Model atmospheres of irradiated exoplanets: The influence of stellar parameters, metallicity, and the C/O ratio
Paul Mollière, Roy van Boekel, Cornelis Petrus Dullemond +2
Many parameters constraining the spectral appearance of exoplanets are still poorly understood. We therefore study the properties of irradiated exoplanet atmospheres over a wide pa…
Scattered light images of spiral arms in marginally gravitationally unstable discs with an embedded planet
A. Pohl, P. Pinilla, M. Benisty +5
Scattered light images of transition discs in the near-infrared often show non-axisymmetric structures in the form of wide-open spiral arms in addition to their characteristic low-…
Planetary population synthesis coupled with atmospheric escape: a statistical view of evaporation
Sheng Jin, Christoph Mordasini, Vivien Parmentier +3
We apply hydrodynamic evaporation models to different synthetic planet populations that were obtained from a planet formation code based on a core-accretion paradigm. We investigat…
Observed spectral energy distribution of the thermal emission from the dayside of WASP-46b
Guo Chen, Roy van Boekel, Hongchi Wang +3
We aim to construct a spectral energy distribution (SED) for the emission from the dayside atmosphere of the hot Jupiter WASP-46b and to investigate its energy budget. We observed…