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First light of the VLT planet finder SPHERE IV. Physical and chemical properties of the planets around HR8799
(EDP Sciences S.A., 2016-03)
Context. The system of four planets discovered around the intermediate-mass star HR8799 offers a unique opportunity to test planet formation theories at large orbital radii and to probe the physics and chemistry at play ...
A direct imaging survey of spitzer-detected debris disks: occurrence of giant planets in dusty systems
(IOP Publishing Ltd., 2017)
We describe a joint high-contrast imaging survey for planets at the Keck and Very Large Telescope of the last large sample of debris disks identified by the Spitzer Space Telescope. No new substellar companions were ...
K2-30 b and K2-34 b: Two inflated hot Jupiters around solar-type stars
(Edp Sciences, 2016-10)
We report the discovery of the two hot Jupiters K2-30 b and K2-34 b. The two planets were detected during campaigns 4 and 5 of the extension of the Kepler mission, K2; they transit their main-sequence stars with periods ...
Planet Formation Signposts: Observability of Circumplanetary Disks via Gas Kinematics
(The American Astronomical Society, 2015-09-20)
The identification of ongoing planet formation requires the finest angular resolutions and deepest sensitivities in
observations inspired by state-of-the-art numerical simulations. Hydrodynamic simulations of planet–dis ...
Search for giant planets in M67 III. Excess of hot Jupiters in dense open clusters
(EDP Sciences, 2016)
Since 2008 we used high-precision radial velocity (RV) measurements obtained with different telescopes to detect signatures of
massive planets around main-sequence and evolved stars of the open cluster (OC) M67. We aimed ...
Giant planets around two intermediate-mass evolved stars and confirmation of the planetary nature of HIP 67851c
(EDP Sciences, 2015)
Context. Precision radial velocities are required to discover and characterize exoplanets. Optical spectra that exhibit many hundreds of absorption lines can allow the m s-1 precision levels required for this work. After ...
Searching for the near-infrared counterpart of Proxima c using multi-epoch high-contrast SPHERE data at VLT
(EDP Science, 2020)
Context. Proxima Centauri is the closest star to the Sun and it is known to host an Earth-like planet in its habitable zone; very recently a second candidate planet was proposed based on radial velocities. At quadrature, ...
Perturbers: SPHERE detection limits to planetary-mass companions in protoplanetary disks
(EDP Sciences, 2021)
The detection of a wide range of substructures such as rings, cavities, and spirals has become a common outcome of high spatial resolution imaging of protoplanetary disks, both in the near-infrared scattered light and in ...
VLT/SPHERE survey for exoplanets around young early-type stars, including systems with multi-belt architectures
(European Southern Observatory, 2020)
Context. Dusty debris disks around pre- and main-sequence stars are potential signposts for the existence of planetesimals and exoplanets. Giant planet formation is therefore expected to play a key role in the evolution ...
A hot Saturn on an eccentric orbit around the giant star K2-132
(EDP Sciences, 2018)
Although the majority of radial velocity detected planets have been found orbiting solar-type stars, a fraction of them have been discovered around giant stars. These planetary systems have revealed different orbital ...