S. Daemgen
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View article: Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-infrared
Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-infrared Open
We present model constraints on the atmospheric structure of HD 106906 b, a planetary-mass companion orbiting at a ∼700 au projected separation around a 15 Myr old stellar binary, using the APOLLO retrieval code on spectral data spanning 1…
View article: Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-Infrared
Atmospheric Retrieval of L Dwarfs: Benchmarking Results and Characterizing the Young Planetary Mass Companion HD 106906 b in the Near-Infrared Open
We present model constraints on the atmospheric structure of HD 106906 b, a planetary-mass companion orbiting at a ~700 AU projected separation around a 15 Myr-old stellar binary, using the APOLLO retrieval code on spectral data spanning 1…
View article: New binaries from the SHINE survey
New binaries from the SHINE survey Open
We present the multiple stellar systems observed within the SpHere INfrared survey for Exoplanet (SHINE). SHINE searched for sub-stellar companions to young stars using high contrast imaging. Although stars with known stellar companions wi…
View article: The SPHERE infrared survey for exoplanets (SHINE)
The SPHERE infrared survey for exoplanets (SHINE) Open
Context. In recent decades, direct imaging has confirmed the existence of substellar companions (exoplanets or brown dwarfs) on wide orbits (>10 au) around their host stars. In striving to understand their formation and evolution mechanism…
View article: VIBES: VIsual Binary Exoplanet survey with SPHERE Upper limits on wide S-planet and S-BD frequencies, triple system discovery, and astrometric confirmation of 20 stellar binaries and three triple systems
VIBES: VIsual Binary Exoplanet survey with SPHERE Upper limits on wide S-planet and S-BD frequencies, triple system discovery, and astrometric confirmation of 20 stellar binaries and three triple systems Open
Recent surveys indicate that planets in binary systems are more abundant than previously thought, which is in agreement with theoretical work on disc dynamics and planet formation in binaries. In order to measure the abundance and physical…
View article: VIBES: Visual Binary Exoplanet survey with SPHERE
VIBES: Visual Binary Exoplanet survey with SPHERE Open
Context. Recent surveys indicate that planets in binary systems are more abundant than previously thought, which is in agreement with theoretical work on disc dynamics and planet formation in binaries. So far, most observational surveys, h…
View article: MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4–5 <i>μ</i>m
MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4–5 <i>μ</i>m Open
Context. Directly imaged planets and substellar companions are key targets for the characterization of self-luminous atmospheres. Their photometric appearance at 4–5 μ m is sensitive to the chemical composition and cloud content of their a…
View article: MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 $\mu$m. I. Photometric analysis of $\beta$ Pic b, HIP 65426 b, PZ Tel B and HD 206893 B.
MIRACLES: atmospheric characterization of directly imaged planets and substellar companions at 4-5 $\mu$m. I. Photometric analysis of $\beta$ Pic b, HIP 65426 b, PZ Tel B and HD 206893 B. Open
Directly imaged planets and substellar companions are key targets for the\ncharacterization of self-luminous atmospheres. Their photometric appearance at\n4-5 $\\mu$m is sensitive to the chemical composition and cloud content of their\natm…
View article: Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 yr of VLT/SPHERE monitoring
Hint of curvature in the orbital motion of the exoplanet 51 Eridani b using 3 yr of VLT/SPHERE monitoring Open
Context. The 51 Eridani system harbors a complex architecture with its primary star forming a hierarchical system with the binary GJ 3305AB at a projected separation of 2000 au, a giant planet orbiting the primary star at 13 au, and a low-…
View article: Post-conjunction detection of <i>β</i> Pictoris b with VLT/SPHERE
Post-conjunction detection of <i>β</i> Pictoris b with VLT/SPHERE Open
Context. With an orbital distance comparable to that of Saturn in the solar system, β Pictoris b is the closest (semi-major axis ≃9 au) exoplanet that has been imaged to orbit a star. Thus it offers unique opportunities for detailed studie…
View article: beta Pictoris b post conjunction detection with VLT/SPHERE
beta Pictoris b post conjunction detection with VLT/SPHERE Open
With an orbital distance comparable to that of Saturn in the solar system, \bpic b is the closest (semi-major axis $\simeq$\,9\,au) exoplanet imaged orbiting a star. Thus it offers unique opportunities of detailed studies of its orbital, p…
View article: High-contrast imaging of tight resolved binaries with two vector vortex\n coronagraphs in cascade with the Palomar SDC instrument
High-contrast imaging of tight resolved binaries with two vector vortex\n coronagraphs in cascade with the Palomar SDC instrument Open
More than half of the stars in the solar neighborhood reside in\nbinary/multiple stellar systems, and recent studies suggest that gas giant\nplanets may be more abundant around binaries than single stars. Yet, these\nmultiple systems are u…
View article: High-contrast imaging of tight resolved binaries with two vector vortex coronagraphs in cascade with the Palomar SDC instrument
High-contrast imaging of tight resolved binaries with two vector vortex coronagraphs in cascade with the Palomar SDC instrument Open
More than half of the stars in the solar neighborhood reside in binary/multiple stellar systems, and recent studies suggest that gas giant planets may be more abundant around binaries than single stars. Yet, these multiple systems are usua…
View article: High-contrast imaging of tight resolved binaries with two vector vortex coronagraphs in cascade with the Palomar SDC instrument
High-contrast imaging of tight resolved binaries with two vector vortex coronagraphs in cascade with the Palomar SDC instrument Open
More than half of the stars in the solar neighborhood reside in binary/multiple stellar systems, and recent studies suggest that gas giant planets may be more abundant around binaries than single stars. Yet, these multiple systems are usua…
View article: VLT/SPHERE astrometric confirmation and orbital analysis of the brown dwarf companion HR 2562 B
VLT/SPHERE astrometric confirmation and orbital analysis of the brown dwarf companion HR 2562 B Open
Context. A low-mass brown dwarf has recently been imaged around HR 2562 (HD 50571), a star hosting a debris disk resolved in the far infrared. Interestingly, the companion location is compatible with an orbit coplanar with the disk and int…
View article: Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries★★★
Observations of fast-moving features in the debris disk of AU Mic on a three-year timescale: Confirmation and new discoveries★★★ Open
Context. The nearby and young M star AU Mic is surrounded by a debris disk in which we previously identified a series of large-scale arch-like structures that have never been seen before in any other debris disk and that move outward at hi…
View article: Dynamical models to explain observations with SPHERE in planetary systems with double debris belts★
Dynamical models to explain observations with SPHERE in planetary systems with double debris belts★ Open
Context. A large number of systems harboring a debris disk show evidence for a double belt architecture. One hypothesis for explaining the gap between the debris belts in these disks is the presence of one or more planets dynamically carvi…
View article: New constraints on the disk characteristics and companion candidates around T Chamaeleontis with VLT/SPHERE
New constraints on the disk characteristics and companion candidates around T Chamaeleontis with VLT/SPHERE Open
Context. 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. Aims. We aim to find signs of disk evolutionary processes by studyin…
View article: Observability of forming planets and their circumplanetary discs – I. Parameter study for ALMA
Observability of forming planets and their circumplanetary discs – I. Parameter study for ALMA Open
We present mock observations of forming planets with ALMA. The possible\ndetections of circumplanetary disks (CPDs) were investigated around planets of\nSaturn, 1, 3, 5, and 10 Jupiter-masses that are placed at 5.2 AU from their\nstar. The…
View article: Orbiting a binary
Orbiting a binary Open
Aims. In this paper we present the results of the SPHERE observation of the HD 284149 system, aimed at a more detailed characterisation of both the primary and its brown dwarf companion. Methods. We observed HD 284149 in the near-infrared …
View article: Orbiting a binary: SPHERE characterisation of the HD 284149 system
Orbiting a binary: SPHERE characterisation of the HD 284149 system Open
In this paper we present the results of the SPHERE observation of the HD 284149 system, aimed at a more detailed characterisation of both the primary and its brown dwarf companion. We observed HD 284149 in the near-infrared with SPHERE, us…
View article: Observability of forming planets and their circumplanetary disks I. – parameter study for ALMA
Observability of forming planets and their circumplanetary disks I. – parameter study for ALMA Open
We present mock observations of forming planets with ALMA. The possible detections of circumplanetary disks (CPDs) were investigated around planets of Saturn, 1, 3, 5, and 10 Jupiter-masses that are placed at 5.2 AU from their star. The ra…
View article: RESOLVING THE PLANET-HOSTING INNER REGIONS OF THE LkCa 15 DISK*
RESOLVING THE PLANET-HOSTING INNER REGIONS OF THE LkCa 15 DISK* Open
LkCa 15 hosts a pre-transitional disk as well as at least one accreting protoplanet orbiting in its gap. Previous disk observations have focused mainly on the outer disk, which is cleared inward of ∼50 au. The planet candidates, on the oth…