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From the scale model of the sky to the armillary sphere
(American Association of Physics Teachers American Institute of Physics, 2014-10)
It is customary to employ a semi-spherical scale model to describe the apparent path of the Sun across the sky, whether it be its diurnal motion or its variation throughout the year. A flat surface and three bent semi-rigid ...
Dynamical models to explain observations with SPHERE in planetary systems with double debris belts
(EDP Sciences, 2018)
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 ...
SPHERE dynamical and spectroscopic characterization of HD 142527B
(EDP Sciences, 2019)
Aims. HD 142527 is one of the most frequently studied Herbig Ae/Be stars with a transitional disk that hosts a large cavity that is up to about 100 au in radius. For this reason, it has been included in the guaranteed time ...
Astrometric and photometric accuracies in high contrast imaging: The SPHERE speckle calibration tool (SpeCal)
(EDP Sciences, 2018-07-19)
Context. The consortium of the Spectro-Polarimetric High-contrast Exoplanet REsearch installed at the Very Large Telescope (SPHERE/VLT) has been operating its guaranteed observation time (260 nights over five years) since ...
Post-conjunction detection of β Pictoris b with VLT/SPHERE
(EDP Sciences, 2019)
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 ...
Upper limits for mass and radius of objects around proxima cen from SPHERE/VLT
(Oxford University Press, 2017)
The recent discovery of an earth-like planet around Proxima Centauri has drawn much attention to this star and its environment. We performed a series of observations of Proxima Centauri using Spectro-Polarimetric High-contrast ...