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Update on the Preliminary Design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy

Stelter, R. Deno and Skemer, Andrew J. and Sallum, Steph and Kupke, Renate and Hinz, Phil and Mawet, Dimitri and Jensen-Clem, Rebecca and Ratliffe, Christopher and MacDonald, Nicholas and Deich, William and Kruglikov, Gabriel and Kassis, Marc and Lyke, Jim and Briesemeister, Zackery and Miles, Brittany and Gerard, Benjamin and Fitzgerald, Michael and Brandt, Timothy and Marois, Christian (2020) Update on the Preliminary Design of SCALES: the Santa Cruz Array of Lenslets for Exoplanet Spectroscopy. . (Unpublished)

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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.

Item Type:Report or Paper (Discussion Paper)
Related URLs:
URLURL TypeDescription Paper
Stelter, R. Deno0000-0003-4549-0210
Skemer, Andrew J.0000-0001-6098-3924
Sallum, Steph0000-0001-6871-6775
Kupke, Renate0000-0002-5826-5314
Hinz, Phil0000-0002-1954-4564
Mawet, Dimitri0000-0002-8895-4735
Jensen-Clem, Rebecca0000-0003-0054-2953
MacDonald, Nicholas0000-0002-6684-8691
Lyke, Jim0000-0001-7809-7867
Briesemeister, Zackery0000-0002-1764-2494
Gerard, Benjamin0000-0003-3978-9195
Fitzgerald, Michael0000-0002-0176-8973
Brandt, Timothy0000-0003-2630-8073
Marois, Christian0000-0002-4164-4182
Additional Information:Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0). We gratefully acknowledge the support of the Heising-Simons Foundation through grant #2019-1697. UC Observatory engineers and staff have worked tirelessly through the COVID-19 pandemic and raging fires. The lead author wishes to acknowledge the Herculean effort on the part of frontline healthcare workers through the pandemic including his father, who serves as an ambulance driver.
Group:Astronomy Department
Funding AgencyGrant Number
Heising-Simons Foundation2019-1697
Subject Keywords:adaptive optics; high-contrast; instrumentation; exoplanets; thermal infrared; integral field spectroscopy; slenslit
Record Number:CaltechAUTHORS:20210202-095305886
Persistent URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:107866
Deposited By: George Porter
Deposited On:03 Feb 2021 20:59
Last Modified:03 Feb 2021 20:59

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