Robert J. De Rosa
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View article: A second planetesimal collision in the Fomalhaut system
A second planetesimal collision in the Fomalhaut system Open
The nearby star Fomalhaut is orbited by a compact source, Fomalhaut b, which has previously been interpreted as either a dust-enshrouded exoplanet or a dust cloud generated by the collision of two planetesimals. Such collisions are rarely …
View article: Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b
Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b Open
HD 143811 AB is the host star to the directly imaged planet HD 143811 AB b, which was recently discovered using data from the Gemini Planet Imager and Keck NIRC2. A member of the Sco-Cen star-forming region with an age of 13 ± 4 Myr, HD 14…
View article: HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen
HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen Open
We present confirmation of HD 143811 AB b, a substellar companion to spectroscopic binary HD 143811 AB through direct imaging with the Gemini Planet Imager (GPI) and Keck NIRC2. HD 143811 AB was observed as a part of the GPI Exoplanet Surv…
View article: Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b
Characterization of the Host Binary of the Directly Imaged Exoplanet HD 143811 AB b Open
HD~143811~AB is the host star to the directly imaged planet HD~143811~AB~b, which was recently discovered using data from the Gemini Planet Imager and Keck NIRC2. A member of the Sco-Cen star-forming region with an age of $13 \pm 4$ Myr, H…
View article: HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen
HD 143811 AB b: A Directly Imaged Planet Orbiting a Spectroscopic Binary in Sco-Cen Open
We present confirmation of HD 143811 AB b, a substellar companion to spectroscopic binary HD 143811 AB through direct imaging with the Gemini Planet Imager (GPI) and Keck NIRC2. HD 143811 AB was observed as a part of the Gemini Planet Imag…
View article: Apache Point Observatory Follow-up of ACcelerating Candidate ExopLanet Host Stars (APO ACCELS): Ages for 166 Accelerating Stars in the Northern Hemisphere
Apache Point Observatory Follow-up of ACcelerating Candidate ExopLanet Host Stars (APO ACCELS): Ages for 166 Accelerating Stars in the Northern Hemisphere Open
Directly imaged substellar companions with well-constrained ages and masses serve as vital empirical benchmarks for planet formation and evolution models. Potential benchmark companions can be identified from astrometric accelerations of t…
View article: A very eccentric brown dwarf coplanar to a warm Jupiter and a hot super Earth
A very eccentric brown dwarf coplanar to a warm Jupiter and a hot super Earth Open
In transiting planetary systems, where planetary sizes are accurately determined from transit observations, the presence of transit timing variations (TTVs), especially when combined with radial velocity (RV) data, provides powerful constr…
View article: The Disks In Scorpius–Centaurus Survey (DISCS). I. Four Newly Resolved Debris Disks in Polarized Intensity Light
The Disks In Scorpius–Centaurus Survey (DISCS). I. Four Newly Resolved Debris Disks in Polarized Intensity Light Open
The presence of infrared excesses around stars directly correlates with spatially resolved imaging detections of circumstellar disks at both millimeter and optical/near-infrared wavelengths. High-contrast imagers have resolved dozens of ci…
View article: High-contrast spectroscopy with the new VLT/ERIS instrument
High-contrast spectroscopy with the new VLT/ERIS instrument Open
Context . The Enhanced Resolution Imager and Spectrograph (ERIS) is the new adaptive optics (AO) assisted infrared instrument at the Very Large Telescope (VLT). Its refurbished integral field spectrograph (IFS) SPIFFIER leverages a new AO …
View article: Characterization of AF Lep b at high spectral resolution with VLT/HiRISE
Characterization of AF Lep b at high spectral resolution with VLT/HiRISE Open
Context. Since the recent discovery of the directly imaged super-Jovian planet AF Lep b, several studies have been conducted to characterize its atmosphere and constrain its orbital parameters. AF Lep b has a measured dynamical mass of 3.6…
View article: Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse
Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse Open
We examine a century of radial velocity, visual magnitude, and astrometric observations of the nearest red supergiant, Betelgeuse, in order to reexamine the century-old assertion that Betelgeuse might be a spectroscopic binary. These data …
View article: VLTI/GRAVITY Observations of AF Lep b: Preference for Circular Orbits, Cloudy Atmospheres, and a Moderately Enhanced Metallicity
VLTI/GRAVITY Observations of AF Lep b: Preference for Circular Orbits, Cloudy Atmospheres, and a Moderately Enhanced Metallicity Open
Direct imaging observations are biased toward wide-separation, massive companions that have degenerate formation histories. Although the majority of exoplanets are expected to form via core accretion, most directly imaged exoplanets have n…
View article: VLTI/GRAVITY Observations of AF Lep b: Preference for Circular Orbits, Cloudy Atmospheres, and a Moderately Enhanced Metallicity
VLTI/GRAVITY Observations of AF Lep b: Preference for Circular Orbits, Cloudy Atmospheres, and a Moderately Enhanced Metallicity Open
Direct imaging observations are biased towards wide-separation, massive companions that have degenerate formation histories. Although the majority of exoplanets are expected to form via core accretion, most directly imaged exoplanets have …
View article: Multiple reference star differential imaging with VLT/SPHERE
Multiple reference star differential imaging with VLT/SPHERE Open
Context . High-contrast imaging observations mostly rely on angular differential imaging, a successful technique for detecting point-sources, such as planets. However, in the vicinity of the star (typically below 300 mas), this technique s…
View article: orbitize! v3: Orbit fitting for the High-contrastImaging Community
orbitize! v3: Orbit fitting for the High-contrastImaging Community Open
Instrumentation
View article: Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse
Radial Velocity and Astrometric Evidence for a Close Companion to Betelgeuse Open
We examine a century of radial velocity, visual magnitude, and astrometric observations of the nearest red supergiant, Betelgeuse, in order to reexamine the century-old assertion that Betelgeuse might be a spectroscopic binary. These data …
View article: orbitize! v3: Orbit fitting for the High-contrast Imaging Community
orbitize! v3: Orbit fitting for the High-contrast Imaging Community Open
orbitize! is a package for Bayesian modeling of the orbital parameters of resolved binary objects from time series measurements. It was developed with the needs of the high-contrast imaging community in mind, and has since also become wide…
View article: The VLT/ERIS vortex coronagraph: design, pointing control, and on-sky performance
The VLT/ERIS vortex coronagraph: design, pointing control, and on-sky performance Open
Instrumentation
View article: The VLT/ERIS vortex coronagraph: design, pointing control, and on-sky performance
The VLT/ERIS vortex coronagraph: design, pointing control, and on-sky performance Open
The Enhanced Resolution Imager and Spectrograph (ERIS) is the new near-infrared instrument at the VLT-UT4. ERIS replaces and extends the observational capabilities formerly provided by SINFONI and NACO: integral field spectroscopy at 1 - 2…
View article: The Roman coronagraph community participation program: observation planning
The Roman coronagraph community participation program: observation planning Open
The Coronagraphic Instrument onboard the Nancy Grace Roman Space Telescope is\nan important stepping stone towards the characterization of habitable, rocky\nexoplanets. In a technology demonstration phase conducted during the first 18\nmon…
View article: PDS 70 unveiled by star-hopping: Total intensity, polarimetry, and millimeter imaging modeled in concert
PDS 70 unveiled by star-hopping: Total intensity, polarimetry, and millimeter imaging modeled in concert Open
Context. Most ground-based direct-imaging planet search campaigns use angular differential imaging that distorts the signal from extended sources, such as protoplanetary disks. In the case of the young system PDS 70, for which two planets …
View article: PDS 70 unveiled by star-hopping: total intensity, polarimetry and mm-imaging modeled in concert
PDS 70 unveiled by star-hopping: total intensity, polarimetry and mm-imaging modeled in concert Open
Context. Most ground-based planet search direct imaging campaigns use angular differential imaging, which distorts the signal from extended sources like protoplanetary disks. In the case PDS 70, a young system with two planets found within…
View article: Analyzing the atmospheric dispersion correction of the Gemini Planet Imager: residual dispersion above design requirements
Analyzing the atmospheric dispersion correction of the Gemini Planet Imager: residual dispersion above design requirements Open
The Atmospheric Dispersion Corrector (ADC) of the Gemini Planet Imager (GPI) corrects the chromatic dispersion caused by differential atmospheric refraction (DAR), making it an important optic for exoplanet observation. Despite requiring l…
View article: A uniform analysis of debris discs with the Gemini Planet Imager II: constraints on dust density distribution using empirically informed scattering phase functions
A uniform analysis of debris discs with the Gemini Planet Imager II: constraints on dust density distribution using empirically informed scattering phase functions Open
Spatially resolved images of debris discs are necessary to determine disc morphological properties and the scattering phase function (SPF) thatantifies the brightness of scattered light as a function of phase angle. Current high-contrast i…
View article: A Uniform Analysis of Debris Disks with the Gemini Planet Imager. I. An Empirical Search for Perturbations from Planetary Companions in Polarized Light Images
A Uniform Analysis of Debris Disks with the Gemini Planet Imager. I. An Empirical Search for Perturbations from Planetary Companions in Polarized Light Images Open
The Gemini Planet Imager (GPI) has excelled in imaging debris disks in the near-infrared. The GPI Exoplanet Survey imaged 24 debris disks in polarized H -band light, while other programs observed half of these disks in polarized J and/or K…
View article: A Uniform Analysis of Debris Disks with the Gemini Planet Imager II: Constraints on Dust Density Distribution Using Empirically-Informed Scattering Phase Functions
A Uniform Analysis of Debris Disks with the Gemini Planet Imager II: Constraints on Dust Density Distribution Using Empirically-Informed Scattering Phase Functions Open
Spatially-resolved images of debris disks are necessary to determine disk morphological properties and the scattering phase function (SPF) which quantifies the brightness of scattered light as a function of phase angle. Current high-contra…
View article: Atmospheric properties of AF Lep b with forward modeling
Atmospheric properties of AF Lep b with forward modeling Open
Context . About a year ago, a super-Jovian planet was directly imaged around the nearby young solar-type star AF Lep. The 2.8 M Jup planet orbiting at a semimajor axis of 8.2 au matches the predicted location based on the HIPPARCOS- Gaia a…
View article: Atmospheric properties of AF Lep b with forward modeling
Atmospheric properties of AF Lep b with forward modeling Open
Aims. We aim to expand the atmospheric exploration of AF Lep b by modeling all available observations obtained with SPHERE at VLT (between 0.95-1.65, at 2.105, and 2.253 $μ$m, and NIRC2 at Keck (at 3.8 $μ$m) with self-consistent atmospheri…
View article: A Uniform Analysis of Debris Disks with the Gemini Planet Imager I: An Empirical Search for Perturbations from Planetary Companions in Polarized Light Images
A Uniform Analysis of Debris Disks with the Gemini Planet Imager I: An Empirical Search for Perturbations from Planetary Companions in Polarized Light Images Open
The Gemini Planet Imager (GPI) has excelled in imaging debris disks in the near-infrared. The GPI Exoplanet Survey (GPIES) imaged twenty-four debris disks in polarized $H$-band light, while other programs observed half of these disks in po…