AO4ELT5 Proceedings

Interferometry in the focal plane with KERNEL

Martinache, Frantz (Laboratoire Lagrange)

KERNEL is an ERC funded project (ERC CoG 2015 # 683029) that aims at boosting the angular resolution of any telescope using the power of interferometry. Looking at the formation of astronomical images as the result of an interferometric process, the mathematical framework at the heart of the KERNEL project makes it possible to use direct focal images to extract either robust observables called kernel-phases that extend the self-calibrating properties of closure-phase to arbitrary apertures and do super-resolution; or wavefront metrology information that can easily and efficiently scale up to multiple references for wide field applications. Currently limited to the small aberration regime, the KERNEL framework can be more widely applied when dealing with spectrally dispersed focal data. The paper presents the current status of the KERNEL project and some of its recent developments and applications that lead to recommendations to reach the ELT's full angular resolution potential, as soon as the first generation AO system becomes available.

DOI: 10.26698/AO4ELT5.0157- Proceeding PDF

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