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Belt(s) of debris resolved around the Sco-Cen star HIP 67497
M. Bonnefoy, J. Milli, F. Ménard +15
In 2015, we initiated a survey of Scorpius-Centaurus A-F stars that are predicted to host warm-inner and cold-outer belts of debris similar to the case of the system HR~8799. The s…
Speckle lifetime in XAO coronagraphic images: temporal evolution of SPHERE coronagraphic images
J. Milli, T. Banas, D. Mouill +11
The major source of noise in high-contrast imaging is the presence of slowly evolving speckles that do not average with time. The temporal stability of the point-spread-function (P…
The International Deep Planet Survey II: The frequency of directly imaged giant exoplanets with stellar mass
Raphael Galicher, Christian Marois, Bruce Macintosh +8
Radial velocity and transit methods are effective for the study of short orbital period exoplanets but they hardly probe objects at large separations for which direct imaging can b…
Characterizing HR3549B using SPHERE
D. Mesa, A. Vigan, V. D'Orazi +28
Aims. In this work, we characterize the low mass companion of the A0 field star HR3549. Methods. We observed HR3549AB in imaging mode with the the NIR branch (IFS and IRDIS) of SPH…
Laboratory validation of the dual-zone phase mask coronagraph in broadband light at the high-contrast imaging THD-testbed
J. R. Delorme, M. N'Diaye, R. Galicher +6
Specific high contrast imaging instruments are mandatory to characterize circumstellar disks and exoplanets around nearby stars. Coronagraphs are commonly used in these facilities…
Discovery of concentric broken rings at sub-arcsec separations in the HD 141569A gas-rich, debris disk with VLT/SPHERE
C. Perrot, A. Boccaletti, E. Pantin +45
Transition disks correspond to a short stage between the young protoplanetary phase and older debris phase. Along this evolutionary sequence, the gas component disappears leaving r…