Author

R. Pourcelot

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Preprint Aug 2026

JWST telemetry combined with active coronagraphy: raw contrast predictions for exoplanet imaging with the Habitable Worlds Observatory

We provide a quantification of the technological gap between the James Webb Space Telescope (JWST) and the Habitable Worlds Observatory (HWO) for the goal of exo-Earth imaging around Sun-like stars at the $10^{-10}$ raw contrast level. We use JWST's in-flight telemetry of the primary segmented mirror to simulate a JWST...

R. Pourcelot, L. Pueyo, E. Por et al. · 0 citations

Preprint Aug 2026

Tradeoff between segment density and IWA for high-contrast imaging of exoplanets with a large segmented space mission

Imaging Earth-like exoplanets with coronagraphs on future large segmented space telescopes such as the Habitable Worlds Observatory requires contrasts down to $10^{-10}$ at separations below 100 mas, imposing segment phasing control down to a few picometers. We evaluate how this constraint can be relaxed by optimizing...

Lucie Leboulleux, R. Pourcelot, L. Pueyo et al. · 1 citation