Update on the preliminary design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

R. Deno Stelter; Andrew J. Skemer; Steph Sallum; Renate Kupke; Phil Hinz; Dimitri Mawet; Rebecca Jensen-Clem; Christopher Ratliffe; Nicholas MacDonald; William Deich; Gabriel Kruglikov; Marc Kassis; Jim Lyke; Zackary Briesemeister; Brittany Miles; Benjamin Gerard; Michael Fitzgerald; Timothy Brandt; Christian Marois

doi:10.1117/12.2562768

13 December 2020 Update on the preliminary design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

R. Deno Stelter, Andrew J. Skemer, Steph Sallum, Renate Kupke, Phil Hinz, Dimitri Mawet, Rebecca Jensen-Clem, Christopher Ratliffe, Nicholas MacDonald, William Deich, Gabriel Kruglikov, Marc Kassis, Jim Lyke, Zackary Briesemeister, Brittany Miles, Benjamin Gerard, Michael Fitzgerald, Timothy Brandt, Christian Marois

Author Affiliations +

Proceedings Volume 11447, Ground-based and Airborne Instrumentation for Astronomy VIII; 1144764 (2020) https://doi.org/10.1117/12.2562768
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

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Abstract

SCALES (Santa Cruz Array of Lenslets for Exoplanet Spectroscopy) is a 2-5 micron high-contrast lenslet integral-field spectrograph (IFS) driven by exoplanet characterization science requirements and will operate at W. M. Keck Observatory. Its fully cryogenic optical train uses a custom silicon lenslet array, selectable coronagraphs, and dispersive prisms to carry out integral field spectroscopy over a 2.2 arcsec field of view at Keck with low (< 300) spectral resolution. A small, dedicated section of the lenslet array feeds an image slicer module that allows for medium spectral resolution (5000 10000), which has not been available at the diffraction limit with a coronagraphic instrument before. Unlike previous IFS exoplanet instruments, SCALES is capable of characterizing cold exoplanet and brown dwarf atmospheres (< 600 K) at bandpasses where these bodies emit most of their radiation while capturing relevant molecular spectral features.

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R. Deno Stelter, Andrew J. Skemer, Steph Sallum, Renate Kupke, Phil Hinz, Dimitri Mawet, Rebecca Jensen-Clem, Christopher Ratliffe, Nicholas MacDonald, William Deich, Gabriel Kruglikov, Marc Kassis, Jim Lyke, Zackary Briesemeister, Brittany Miles, Benjamin Gerard, Michael Fitzgerald, Timothy Brandt, and Christian Marois "Update on the preliminary design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy", Proc. SPIE 11447, Ground-based and Airborne Instrumentation for Astronomy VIII, 1144764 (13 December 2020); https://doi.org/10.1117/12.2562768

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