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Author

P. Tuthill

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3 papers indexed here

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Preprint Sep 2026

A Candidate Innermost Fifth Planet In the HR 8799 System Revealed By JWST NIRISS Aperture Masking Interferometry

We detect a candidate fifth planet in the HR 8799 system, directly imaged with the JWST/NIRISS Aperture Masking Interferometer (AMI). The detected source lies just above a $3\sigma$ contrast curve at a contrast of $\sim2\times10^{-4}$ in the F380M filter at a projected separation of $\sim150$ mas, corresponding to a fe...

Jayke S. Nguyen, L. Desdoigts, A. Greenbaum et al. · 0 citations
Aug 2026

Astrometric detection of rocky exoplanets from inexpensive space platforms

The detection of orbiting exoplanets by way of astrometric monitoring of the host star to reveal gravitationally induced reflex motion requires extreme precision and measurement stability when targeting Earth-mass objects. Despite this, astrometry is widely regarded as the most promising avenue for the most desired of...

P. Tuthill, George Ayad, Donald G. Dansereau et al. · 0 citations
Open access Aug 2026

ADORA: a differentiable optical modeling and astrometric retrieval framework for SHERA

ADORA provides a flexible framework for studying astrometric extraction, calibration-bias diagnosis, and future SHERA requirements, and Pixel-position errors across the tested range remain near the matched-model recovery scale indicating robustness to certain detector calibration errors.

Dylan M. McKeithen, S. Shaklan, G. Vasisht et al. · 0 citations

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