ANDES, the high resolution spectrograph for the ELT: extending to the K-band

W. Gaessler; H, Korhonen; F, Baron; W, Brandner; P, Di Marcantonio; R, Doyon; M, Ebert; A, Kaminski; L, Kreidberg; W, Laun; M, Lehmitz; A, Marconi; P, Mollière; A, Quirrenbach; R.-R. Rohloff; W. Seifert; J. Stuermer; J. Saint-Antoine; W. Xu; A. Zanutta

doi:10.1117/12.3018397

18 July 2024 ANDES, the high resolution spectrograph for the ELT: extending to the K-band

W. Gaessler, H, Korhonen, F, Baron, W, Brandner, P, Di Marcantonio, R, Doyon, M, Ebert, A, Kaminski, L, Kreidberg, W, Laun, M, Lehmitz, A, Marconi, P, Mollière, A, Quirrenbach, R.-R. Rohloff, W. Seifert, J. Stuermer, J. Saint-Antoine, W. Xu, A. Zanutta

Author Affiliations +

Proceedings Volume 13096, Ground-based and Airborne Instrumentation for Astronomy X; 130964E (2024) https://doi.org/10.1117/12.3018397
Event: SPIE Astronomical Telescopes + Instrumentation, 2024, Yokohama, Japan

Abstract

ANDES is a high resolution spectrograph for the ELT, with the goal of providing simultaneous spectra with R 100000 from 0.35 to 2.4 micrometer. The baseline of the instrument covers 0.4 - 1.8 micron. Here we present the study on the extension into the K-band (1.95 to 2.45 micron) with its scientific motivation and the technical solution. The spectrograph design is constrained by external limits, but a solution is found that enables key science cases in this wavelength range and closes the gap in ELT high resolution spectroscopy between the ANDES baseline and the METIS instrument. The spectrograph design is throughput-optimized and is fed by the diffraction-limited input from the ANDES SCAO system. We summarize the preliminary optical and cryo-mechanical design. But, as the available mass is one of the critical parameters, we also look into an alternative implementation of the spectrograph with carbon fiber.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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W. Gaessler, H, Korhonen, F, Baron, W, Brandner, P, Di Marcantonio, R, Doyon, M, Ebert, A, Kaminski, L, Kreidberg, W, Laun, M, Lehmitz, A, Marconi, P, Mollière, A, Quirrenbach, R.-R. Rohloff, W. Seifert, J. Stuermer, J. Saint-Antoine, W. Xu, and A. Zanutta "ANDES, the high resolution spectrograph for the ELT: extending to the K-band", Proc. SPIE 13096, Ground-based and Airborne Instrumentation for Astronomy X, 130964E (18 July 2024); https://doi.org/10.1117/12.3018397

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