D
J
Last name: DEJONGHE
First name: Julien
International audience
International audience
International audience
International audience
The JOVIAL instrument is a Doppler imager, dedicated to the study of atmospheric dynamics at the surface of the planets of the Solar System, and in particle Jupiter and Saturn. The principle of this instrument is fully described in several papers presented at previous SPIE meetings 1-4 (Gonçalves et al, 2016; Soulat et al, 2017; Underwood et...
AOC (Adaptive Optics system at Calern) is an adaptive optics bench being developed on the Epsilon (East) telescope of the two 1-m telescopes of C2PU (Centre Pédagogique Planète Univers), Calern observatory, Observatoire de la Côte d'Azur (OCA), near Nice (France). It is installed at the F/35 Coudé focus, and aims at correcting the wavefront in...
This paper describes instrumentation used to adapt the Dunn Solar Telescope (DST) located on Sacramento Peak in Sunspot, NM for observations using the Doppler Spectro Imager (DSI). The DSI is based on a Mach-Zehnder interferometer and measures the Doppler shift of solar lines to allow the study of atmospheric dynamics of giant planets and the...
The measurements of radial velocity fields on planets with a Doppler Spectro-Imager allow the study of atmospheric dynamics of giant planets and the detection of their acoustic oscillations. The frequencies of these oscillations lead to the determination of the internal structure by asteroseismology. A new imaging tachometer, based on a...
SPEED (Segmented Pupil Experiment for Exoplanet Detection) is an instrumental testbed designed to offer an ideal cocoon to provide relevant solutions in both cophasing and high-contrast imaging with segmented telescopes. The next generation of observatories will be made of a primary mirror with excessive complexity (mirror segmentation, central...
The AOC (Adaptive Optics at Calern) project is an adaptive optics bench being installed on one of the two 1-m telescopes of C2PU (Centre Pédagogique Planète Univers), situated in the Calern observatory, Observatoire de la Côte d'Azur, near Nice (France). AOC is installed at the Coudé focus of the telescope, and aims at working in the visible...
International audience
The VLTI has a huge potential for the study of Active Galactic Nuclei. It allows to resolve the BLR by phase differential interferometry and to make images of the inner dust « torus ». The first generation VLTI instruments AMBER and MIDI allowed studies of the size-luminosity of the inner dust structures and showed strong departures from the...
International audience
CHARA/SPICA (Stellar Parameters and Images with a Cophased Array) is currently being developed at Observatoire de la Cote d'Azur. It will be installed at the visible focus of the CHARA Array by the end of 2021. It has been designed to perform a large survey of fundamental stellar parameters with, in the possible cases, a detailed imaging of the...