High contrast imaging with ELT/METIS: The wind driven halo, from SPHERE to METIS

METIS is one of the three first-light instruments planned for the ELT, mainly dedicated to high contrast imaging in the mid-infrared. On the SPHERE high-contrast instrument currently installed at the VLT, we observe that one of the main contrast limitations is the wind driven halo, due to the limite...

Full description

Saved in:
Bibliographic Details
Published in:arXiv.org 2019-11
Main Authors: Cantalloube, Faustine, Absil, Olivier, Bertram, Thomas, Brandner, Wolfgang, Delacroix, Christian, Feldt, Markus, Kenworthy, Matthew, Kulas, Martin, Milli, Julien, Neureuther, Philip, Gilles Orban de Xivry, Pathak, Prashant, Por, Emiel, Scheithauer, Silvia, Steuer, Horst, Roy van Boekel
Format: Article
Language:English
Subjects:
Adaptive optics
Atmospheric turbulence
Infrared imaging
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:METIS is one of the three first-light instruments planned for the ELT, mainly dedicated to high contrast imaging in the mid-infrared. On the SPHERE high-contrast instrument currently installed at the VLT, we observe that one of the main contrast limitations is the wind driven halo, due to the limited AO running speed with respect to the atmospheric turbulence temporal evolution. From this observation, we extrapolate this signature to the ELT/METIS instrument, which is equipped with a single conjugated adaptive optics system and with several coronagraphic devices. By making use of an analytic AO simulator, we compare the amount of wind driven halo observed with SPHERE and with METIS, under the same turbulence conditions.
ISSN:2331-8422