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A. Léger

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Review Open access Nov 2025

System analysis for a high-precision high-accuracy astrometric instrument for HWO

This study presents an updated system analysis for an instrument onboard the Habitable Worlds Observatory (HWO), designed for high-precision, high-accuracy differential astrometry, with the primary scientific goal to determine the mass of Earth-like planets around the nearest Sun-like stars. The analysis integrates the...

J. Amiaux, Fabien Malbet, F. Ardellier-Desages et al. · 2 citations
Open access Aug 2026

Pixel-level calibration for space-based high-precision astrometry using Young’s fringes

The detection of Earth-like exoplanets via astrometry necessitates centroiding precision at the 0.3 microarcsec level, thereby imposing stringent constraints on the focal plane geometry of space telescopes. The AGATE focal plane instrument, a proposed component of the NASA Habitable Worlds Observatory (HWO), aims to ac...

Hugo Rousset, É. Thiébaut, Chloé Rey et al. · 0 citations

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