Lessons learned from the NEAR experiment and prospects for the upcoming mid-IR HCI instruments

Prashant Pathak; Markus Kasper; Olivier Absil; Gilles Orban de Xivry; Ulli Käufl; Gerd Jakob; Ralf Siebenmorgen; Serban Leveratto; Eric Pantin

doi:10.1117/12.2630040

29 August 2022 Lessons learned from the NEAR experiment and prospects for the upcoming mid-IR HCI instruments

Prashant Pathak, Markus Kasper, Olivier Absil, Gilles Orban de Xivry, Ulli Käufl, Gerd Jakob, Ralf Siebenmorgen, Serban Leveratto, Eric Pantin

Author Affiliations +

Proceedings Volume 12185, Adaptive Optics Systems VIII; 121851T (2022) https://doi.org/10.1117/12.2630040
Event: SPIE Astronomical Telescopes + Instrumentation, 2022, Montréal, Québec, Canada

Abstract

The mid-infrared (IR) regime is well suited to directly detect the thermal signatures of exoplanets in our solar neighborhood. The NEAR experiment: demonstration of high-contrast imaging (HCI) capability at ten microns, can reach sub-mJy detection sensitivity in a few hours of observation time, which is sufficient to detect a few Jupiter mass planets in nearby systems. One of the big limitations for HCI in the mid-IR is thermal sky-background. In this work, we show that precipitate water vapor (PWV) is the principal contributor to thermal sky background and science PSF quality. In the presence of high PWV, the HCI performance is significantly degraded in the background limited regime.

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Prashant Pathak, Markus Kasper, Olivier Absil, Gilles Orban de Xivry, Ulli Käufl, Gerd Jakob, Ralf Siebenmorgen, Serban Leveratto, and Eric Pantin "Lessons learned from the NEAR experiment and prospects for the upcoming mid-IR HCI instruments", Proc. SPIE 12185, Adaptive Optics Systems VIII, 121851T (29 August 2022); https://doi.org/10.1117/12.2630040

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