In this new publication, KERNEL team PhD student Alban Ceau and collaborators formulate new formal tools and techniques to determine the contrast detection limits for a planned JWST program designed to look for companions around ultracool Y-dwarfs.
The paper notably introduces an operational test that turns out to be only marginally less powerful than the theoretical optimal (aka Neyman-Pearson) test. The operational test, applied to simulated JWST images of the NIRISS instrument expected to be representative of planned observations of faint Y-dwarfs suggests that companions of less than 1 Jupiter mass are well within the grasp of this observing mode.
Congratulations to Alban whose paper was accepted for publication by Astronomy & Astrophysics! The preprint version of the paper is available for download on the arXiv.org website: https://arxiv.org/abs/1908.03130