The technological developments initiated in the early 21 century have led to the implementation of “planet finders” instruments on 8-m class telescopes which are in operation since 2014-2015. Such facilities are at the inception of significant progresses in the study of exoplanetary systems by enabling high contrast imaging of the environment of young nearby stars. One of the most productive science in this field is certainly the observations at high angular resolution of circumstellar disks, from the very young gas-rich protoplanetary disks all the way to more elusive dust-rich debris disks. In this paper, we summarize the main results obtained for these two categories of objects focusing on their morphological characteristics, as well as on the measurement of optical properties of the small dust particles to which the near IR spectral range is sensitive to. We mostly provide exemples based on observations performed with the SPHERE instrument at the VLT.
Les développements technologiques initiés au début du 21ème siècle ont conduit à la mise en place d’instruments “découvreurs de planètes” sur des télescopes de la classe 8m en fonctionnement depuis 2014-2015. De telles installations sont à l’origine de progrès significatifs dans l’étude des systèmes exoplanétaires en permettant l’imagerie à haut contraste de l’environnement des jeunes étoiles proches. L’une des sciences les plus productives dans ce domaine est certainement l’observation à haute résolution angulaire des disques circumstellaires, depuis les très jeunes disques protoplanétaires riches en gaz jusqu’aux disques de débris plus insaisissables, riches en poussières. Dans cet article, nous résumons les principaux résultats obtenus pour ces deux catégories d’objets en nous concentrant sur leurs caractéristiques morphologiques, ainsi que sur la mesure des propriétés optiques des petites particules de poussière auxquelles la gamme spectrale du proche IR est sensible. Nous présentons surtout des exemples basés sur des observations réalisées avec l’instrument SPHERE au VLT.
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Mot clés : Disques circumstellaires, formation des planètes, exoplanètes, imagerie haut contraste, imagerie polarimétrique
Anthony Boccaletti 1
CC-BY 4.0
@article{CRPHYS_2023__24_S2_151_0,
author = {Anthony Boccaletti},
title = {Observations of circumstellar disks in scattered light with {SPHERE} at the {VLT}},
journal = {Comptes Rendus. Physique},
pages = {151--169},
publisher = {Acad\'emie des sciences, Paris},
volume = {24},
number = {S2},
year = {2023},
doi = {10.5802/crphys.134},
language = {en},
}
Anthony Boccaletti. Observations of circumstellar disks in scattered light with SPHERE at the VLT. Comptes Rendus. Physique, Volume 24 (2023) no. S2, pp. 151-169. doi : 10.5802/crphys.134. https://comptes-rendus.academie-sciences.fr/physique/articles/10.5802/crphys.134/
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