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We present optimal survey strategies for the upcoming NIX imager, part of theERIS instrument to be installed on the Very Large Telescope (VLT). We will usea custom 2.2 micron K-peak filter to optimise the efficiency of a futurelarge-scale direct imaging survey, aiming to detect brown dwarfs and giantplanets around nearby stars. We use the results of previous large scale imagingsurveys (primarily SPHERE SHINE and Gemini GPIES) to inform our choice oftargets, as well as improved planet population distributions. We present fourpossible approaches to optimise survey target lists for the highest yield ofdetections: i) targeting objects with anomalous proper motion trends, ii) afollow-up survey of dense fields from SPHERE SHINE and Gemini GPIES iii)surveying nearby star-forming regions and iv) targeting newly discoveredmembers of nearby young moving groups. We also compare the predictedperformance of NIX to other state-of-the-art direct imaging instruments.

monthly notices of the royal astronomical society

An optimised survey strategy for the ERIS/NIX imager: searching for  young giant exoplanets and very low mass brown dwarfs using the K-peak custom  photometric filter