65 citations · 82 across the 8 of their papers we have counts for
11 papers
A study of the frequency and characteristics of stellar companions and Jupiter-like planets in nearby open clusters
R. Gratton, M. Bonavita, D. Mesa +9
Observations of companions of solar-type stars in nearby young moving groups (NYMGs) show that they split into two groups: stellar and brown dwarf companions (mass ratio )…
Implications of the discovery of AF Lep b: The mass-luminosity relation for planets in the Pic Moving Group and the L-T transition for young companions and free-floating planets
R. Gratton, M. Bonavita, D. Mesa +7
Dynamical masses of young planets aged between 10 and 200 Myr detected in imaging play a crucial role in shaping models of giant planet formation. Regrettably, only a few such obje…
Stellar companions and Jupiter-like planets in young associations
R. Gratton, M. Bonavita, D. Mesa +9
Recently, combining high-contrast imaging and space astrometry we found that Jupiter-like (JL) planets are frequent in the beta Pic moving group (BPMG) around those stars where the…
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems V: Do Self-Consistent Atmospheric Models Represent JWST Spectra? A Showcase With VHS 1256 b
Simon Petrus, Niall Whiteford, Polychronis Patapis +119
The unprecedented medium-resolution (R~1500-3500) near- and mid-infrared (1-18um) spectrum provided by JWST for the young (140+/-20Myr) low-mass (12-20MJup) L-T transition (L7) com…
The polarisation properties of the HD 181327 debris ring. Evidence for sub-micron particles from scattered light observations
Julien Milli, Elodie Choquet, Ryo Tazaki +26
Polarisation is a powerful remote-sensing tool to study the nature of particles scattering the starlight. It is widely used to characterise interplanetary dust particles in the Sol…
The debris disc of HD 131488 -- Bringing together thermal emission and scattered light
Nicole Pawellek, Attila Moór, Florian Kirchschlager +9
We show the first SPHERE/IRDIS and IFS data of the CO-rich debris disc around HD 131488. We use N-body simulations to model both the scattered light images and the SED of the disc…
Jupiter-like planets might be common in a low-density environment
Raffaele Gratton, Dino Mesa, Mariangela Bonavita +6
Radial velocity surveys suggest that the Solar System may be unusual and that Jupiter-like planets have a frequency <20% around solar-type stars. However, they may be much more com…
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems III: Aperture Masking Interferometric Observations of the star HIP 65426 at 3.8 um
Shrishmoy Ray, Steph Sallum, Sasha Hinkley +121
We present aperture masking interferometry (AMI) observations of the star HIP 65426 at as a part of the JWST Direct Imaging Early Release Science (ERS) program obtai…
The JWST Early Release Science Program for Direct Observations of Exoplanetary Systems IV: NIRISS Aperture Masking Interferometry Performance and Lessons Learned
Steph Sallum, Shrishmoy Ray, Jens Kammerer +120
We present a performance analysis for the aperture masking interferometry (AMI) mode on board the James Webb Space Telescope Near Infrared Imager and Slitless Spectrograph (JWST/NI…
Limits on the presence of planets in systems with debris disks: HD 92945 and HD 107146
D. Mesa, S. Marino, M. Bonavita +38
Recent observations of resolved cold debris disks at tens of au have revealed that gaps could be a common feature in these Kuiper belt analogues. Such gaps could be evidence for th…
A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS. First polarimetric detections revealing disks around DH Tau B and GSC 6214-210 B
R. G. van Holstein, T. Stolker, R. Jensen-Clem +22
Young giant planets and brown dwarf companions emit near-infrared radiation that can be linearly polarized up to several percent. This polarization can reveal the presence of a cir…