RISTRETTO: a pathfinder instrument for exoplanet atmosphere characterization

Bruno Chazelas; Christophe Lovis; Nicolas Blind; Jonas Kühn; Ludovic Genolet; Ian Hughes; Martin Turbet; Janis Hagelberg; Nathanaël Restori; Markus Kasper; Nelly Natalia Cerpa Urra

doi:10.1117/12.2576316

13 December 2020 RISTRETTO: a pathfinder instrument for exoplanet atmosphere characterization

Bruno Chazelas, Christophe Lovis, Nicolas Blind, Jonas Kühn, Ludovic Genolet, Ian Hughes, Martin Turbet, Janis Hagelberg, Nathanaël Restori, Markus Kasper, Nelly Natalia Cerpa Urra

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Proceedings Volume 11448, Adaptive Optics Systems VII; 1144875 (2020) https://doi.org/10.1117/12.2576316
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

We introduce the RISTRETTO instrument for ESO VLT, an evolution from the original idea of connecting the SPHERE high-contrast facility to the ESPRESSO spectrograph (Lovis et al 2017). RISTRETTO is an independent, AO-fed spectrograph proposed as a visitor instrument, with the goal of detecting nearby exoplanets in reflected light for the first time. RISTRETTO aims at characterizing the atmospheres of Proxima b and several other exoplanets using the technique of high-contrast, high-resolution spectroscopy. The instrument is composed of two parts: a front-end to be installed on VLT UT4 providing a two-stage adaptive optics system using the AOF facility with coronagraphic capability and a 7-fiber IFU, and a diffraction-limited R=135,000 spectrograph in the 620-840 nm range. We present the requirements and the preliminary design of the instrument.

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Bruno Chazelas, Christophe Lovis, Nicolas Blind, Jonas Kühn, Ludovic Genolet, Ian Hughes, Martin Turbet, Janis Hagelberg, Nathanaël Restori, Markus Kasper, and Nelly Natalia Cerpa Urra "RISTRETTO: a pathfinder instrument for exoplanet atmosphere characterization", Proc. SPIE 11448, Adaptive Optics Systems VII, 1144875 (13 December 2020); https://doi.org/10.1117/12.2576316

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