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20242026
most citedA Multiband Study of the HR 4796A Disk in the Optical Using MagAO-X

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astro-ph.IM2026

Sub-diffraction-limited coronagraphic imaging with nano-printed PIAACMC phase masks

Elena Tonucci, Sebastiaan Y. Haffert, Warren B. Foster +22

Imaging Earth-like exoplanets in the habitable zone of their host star is among the main science objectives of future ground-based and space-based observatories. However, the extre…

astro-ph.IM2026

Comparing realtime optical gain measurement and methods on MagAO-X

Eden McEwen, Jared R. Males, Olivier Guyon +20

A lingering technical challenge for pyramid wavefront sensors (PyWFS) is their change in response between calibration and correction residuals, a quantity known as optical gain (OG…

astro-ph.IM2026

windsoCC: reconstructing the wind-driven halo in MagAO-X images using wavefront sensor telemetry

Jay K. Kueny, Jared R. Males, Alycia J. Weinberger +16

The wind-driven halo (WDH) is a persistent, low spatial frequency noise artifact that arises due to the servo-lag error inherent to all adaptive optics (AO) instruments. Spatial fi…

astro-ph.EP20261 cited

A Multiband Study of the HR 4796A Disk in the Optical Using MagAO-X

Jay K. Kueny, Alycia J. Weinberger, Zhe-Yu Daniel Lin +18

We present total intensity images of the debris disk around HR 4796A from observations spanning 2023 to 2025 with the Magellan extreme adaptive optics instrument (MagAO-X). We dete…

astro-ph.IM2026

ffortissimo: A Freeform Forward-Modeling Pipeline for High-Contrast Images of Circumstellar Disks Based on Automatic Differentiation

Jay K. Kueny, Joseph D. Long, Jared R. Males +16

Modeling circumstellar disks in the traditional sense carries the assumption that the dust density distribution can be accurately described with a fixed parametric form. Furthermor…

astro-ph.EP2026

The spectral energy distribution of YSES 1 b and its circumplanetary disc

Michiel Darcis, Sebastiaan Y. Haffert, Tomas Stolker +18

Context. Direct imaging enables the characterisation of substellar companions on wide orbits. These objects provide a testbed for our formation theories; therefore, it is important…