On-sky compensation of non-common path aberrations with the ZELDA wavefront sensor in VLT/SPHERE

2018/06/16 by A. Vigan, Vigan, A., Mamadou N’Diaye +17
Physics and Astronomy · #Adaptive optics and wavefront sensing #Astronomy and Astrophysical Research #FOS: Physical sciences #Instrumentation and Methods for Astrophysics (astro-ph.IM) #Stellar, planetary, and galactic studies

paper · pdf · doi:10.48550/arxiv.1806.06158

openalex publication_date 2018/06/16 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

Circumstellar environments are now routinely observed by dedicated high-contrast imagers on large, ground-based observatories. These facilities combine extreme adaptive optics and coronagraphy to achieve unprecedented sensitivities for exoplanet detection and spectral characterization. However, non-common path aberrations (NCPA) in these coronagraphic systems represent a critical limitation for the detection of giant planets with a contrast lower than a few 10^-6 at very small separations (

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