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Design of SCALES: A 2-5 Micron Coronagraphic Integral Field Spectrograph for Keck Observatory

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arxiv 2208.10721 v1 pith:JMMNWQZW submitted 2022-08-23 astro-ph.IM

Design of SCALES: A 2-5 Micron Coronagraphic Integral Field Spectrograph for Keck Observatory

Andrew Skemer , R. Deno Stelter , Stephanie Sallum , Nicholas MacDonald , Renate Kupke , Christopher Ratliffe , Ravinder Banyal , Amirul Hasan
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Hari Mohan Varshney Arun Surya Ajin Prakash Sivarani Thirupathi Ramya Sethuraman Govinda K.V. Michael P. Fitzgerald Eric Wang Marc Kassis Olivier Absil Carlos Alvarez Natasha Batalha Marc-Andre Boucher Cyril Bourgenot Timothy Brandt Zackery Briesemeister Katherine de Kleer Imke de Pater William Deich Devika Divakar Guillaume Filion Etienne Gauvin Michael Gonzales Thomas Greene Philip Hinz Rebecca Jensen-Clem Christopher Johnson Isabel Kain Gabriel Kruglikov Mackenzie Lach Jean-Thomas Landry Jialin Li Michael C. Liu James Lyke Kenneth Magnone Eduardo Marin Emily C. Martin Raquel A. Martinez Dimitri Mawet Brittany Miles Dale Sandford Patrick Sheehan Ji Man Sohn Jordan Stone
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keywords scalesdesignkeckspectroscopyadditionallycoronagraphicfieldintegral
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We present the design of SCALES (Slicer Combined with Array of Lenslets for Exoplanet Spectroscopy) a new 2-5 micron coronagraphic integral field spectrograph under construction for Keck Observatory. SCALES enables low-resolution (R~50) spectroscopy, as well as medium-resolution (R~4,000) spectroscopy with the goal of discovering and characterizing cold exoplanets that are brightest in the thermal infrared. Additionally, SCALES has a 12x12" field-of-view imager that will be used for general adaptive optics science at Keck. We present SCALES's specifications, its science case, its overall design, and simulations of its expected performance. Additionally, we present progress on procuring, fabricating and testing long lead-time components.

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